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 Page 1 of 2 ALL12
Username Post: How common is piston slap in 5.3L engines?        (Topic#133591)
NHSilverado 
Senior Member
Posts: 714
NHSilverado
Loc: NH
Reg: 03-31-06
06-10-06 12:11 PM - Post#950606    

I am curious how common this 5.3L piston slap issue is I have heard about recently? Have to say that not being a Chevy/GM guy before this current truck, and not working in the auto field since the mid 90's when Chevy/GMC trucks had 305's or 350's, it was not something I even thought of in relation to the 5.3L in my truck.

I do know the wrist/piston pins on the Chevy SB have always been a weak area at least in my personal/work experience with building up engines with aftermarket parts and drag racing them but I hadn't heard of it in the new, stock, GM SB's like the 5.3L until recently. Doesn't make me happy hearing about it after I have bought a truck with a 5.3L I have to say. Kind of late to do anything about it now really but I am now curious to hear more about it.

My HEMI Ram had the infamous HEMI Tick and it drove me nuts even though it was not something that caused any harm. I have heard the 5.3L piston slap is a similar thing( ie; annoying noise but no harm comes of it ). Me, well I can't stand noises like that so I am now paranoid about my engine developing it. Also, I don't see how a bad piston pin/pins, and thus a loose piston/pistons in the cylinder(s) causing the noise, is not something to be concerned about? To me this means a lot of wear and tear on the cylinder wall and piston itself which in time can only lead to no good. What am I missing that makes it something to not be concerned about if my 5.3L developes it?

Was this more an issue with older 5.3L's or is it common even on 05-06 engines as well? I have the HO 5.3L( 2005 )with the aluminum block. Are all the 5.3L's prone to this problem or do the cast or aluminum block versions seem more so then the other? Has GM come out with any kind of recall/tsb on this problem? Will they do anything for it if it shows up at less then 36K or 3 years under the base warranty or do they call it "normal" to avoid dealing with it? Do most 5.3L's do it or is it just a few? Is there an approx mile figure/range where it usually shows up or does it vary? Is there anything that can be done before the noise arrives to lessen the chances it will such as running synthetic oil( I will anyway but...? ). Just curious.

Would appreciate any info on this issue. I really don't want another vehicle that makes annoying engine noises that the mfg says is "normal" and "nothing to worry about". Drove me nuts in the HEMI Ram. The Toyota 4.0L V6 made all kinds of noises but an especially annoying exhauust leak noise( design of the manifold echoed the exhaust and made it sound like a header leak )that Toyota called normal. This 5.3L to this point( approx 2800 miles )is very quiet and that is a good thing IMO. I am going to flip if it develops this piston slap noise. Just can't take another new vehicle with engine noise.
2008 Equinox
1LT AWD

http://gsthunder0.tripod.com


 
LMC Trucks
redvett01 
Senior Member
Posts: 1158

Loc: Grayling, MI
Reg: 10-23-03
Re: How common is piston slap in 5.3L engines?
06-10-06 01:09 PM - Post#950607    
    In response to NHSilverado

Every engine makes noises and there are no exceptions just some are noisier than others are. Piston knock isnt harmful to an engine. Older forged piston engines were notorious for the knock until warm.
Dont worry about it. If you had a stethoscope and listened to every engine you would be amazed by the noise you can hear. Some engines have noises more audible than others they all make noise there a mechanical devise .
K1500 04 Silverado EXT


 
NC_Redneck 
Senior Member
Posts: 623
NC_Redneck
Loc: Northern California
Reg: 07-09-04
Re: How common is piston slap in 5.3L engines?
06-10-06 01:25 PM - Post#950608    
    In response to redvett01

Not all of them do. The ones that do only knock for a few seconds on cold starts. If yours does develop the knock, diconect the pcv line and start the engine. Then put some seafoam in the PCV line (about half a can) and let it choke out the engine. Let it sit for about 15-20 minutes start it up and be prepared for a smoke show. I did this with my truck and have been using Lucas fuel additive and it has not come back.
2002 1500 Z71 Ext.Cab S.B. Victory Red 33in. Mud Terrain Tires Flowmaster Exhaust TrueFlow Cold Air Intake Kit Wester's Hot Tune 1970 El Camino


 
craigblock 
Valued Contributor
Posts: 4008
craigblock
Loc: Ottawa
Reg: 05-22-05
Re: How common is piston slap in 5.3L engines?
06-10-06 01:44 PM - Post#950609    
    In response to NC_Redneck

People a few doors down from me own a Suburban, new enough to have a 5.3. One time while I was outside, they started it up and began to drive past my house, and I could have sworn it was a diesel! I know that it's a gas engine, because whenever they pull in, it's quiet. Still, does it ever sound bad when it fires up!
Casting Numbers


 
silvervortek 
Senior Member
Posts: 732

Loc: Georgia USA/ west coast I...
Reg: 10-10-04
Re: How common is piston slap in 5.3L engines?
06-10-06 07:40 PM - Post#950610    
    In response to NHSilverado

I have 130 thousand miles on my 5.3 litre vortek engine , i dont have the piston slap noise.
I did have a lifter making a little noise one time just after changing oil but i had used that oil cleaner you pour in before you change oil/ but that noise went away after a day or so.
Since brand new i have used mobil 1 oil syn. For the first 100 thou miles i used 93 octane gas, but since the gas went up in price a lot i have changed to 89 octane /i still think i should have stuck to the 93 i had a little more power while towing and overall the engine ran smoother.
Touching wood the engine still runs and performs like brand new.
I would definately recommend using the mobil 1 syn and the good oil filters.
The most common faults on the vortek engines from re3ading posts is the fuel pressure regulator going out at 60 thou miles and the fuel pump whining.
One other key thing is to stick with dexcool and if you ever have to top up used the diluted ready to pour dexcool /if u have to use water use distilled water and never mix any other kind of anti freeze with dexcool.
Other than that i think the vortek engine is a great engine/ mind you i dont run the engine up in the 5 thou to 6 thou rpm range.
Stay away from those cottom oil type air filters /stick with stock air filter and youll have nothing to worry about.
I have a 99 silverado, regular cab ,long bed ,was 4 wheel drive,has auto and 5.3 vortek engine. one hundred and thirty


 
dcarey 
Contributor
Posts: 911

Loc: Mineral, VA
Reg: 01-01-03
Re: How common is piston slap in 5.3L engines?
06-11-06 02:14 AM - Post#950611    
    In response to silvervortek

It's actually a cold start knock. My 2000 developed it at around 50,000 miles. It would knock several seconds at start up, then quiet itself. Seafoam helped, but it came back. That's the only thing that ever helped on my engine. The truck has close to 130,000 miles on it now, and is running strong, burns/uses almost no oil, with the same cold start knock. With all the panic about this a few years ago, I've personally yet to see a 5.3 engine fail due to this condition. So far, I hear nothing on my 2005, but if you stick your head up in the passenger wheel well at start up, you'll hear it. Faint as it is, it's still there. It's nothing to worry about mechanically, and GM will do nothing about it if the noise on your engine becomes audible enough to be annoying. Right or wrong, that's the way it is.
Dave 2005 5.3 Reg Cab Shortbed 4x4


 
elcamino 
Valued Contributor
Posts: 4995
elcamino
Loc: Lake Superior-Michigan US...
Reg: 03-30-00
Re: How common is piston slap in 5.3L engines?
06-11-06 02:41 AM - Post#950612    
    In response to dcarey

Well if seafoam helped, then the noise was carbon build up on the pistons and valves.

I am convinced as are many experts, its carbon and nothing else. I had a 2001 that would make the noise often. Once I was passing a car and out of a drive a car pulled into my lane. So I had to floor it to make it in and when I did that I could see cloulds of black smoke come from my tail pipe. I was always driving 90 miles a day (work) at 60mph+ but my engine was carboned up. So farther down the road, I started flooring it and watching the carbon blow out of the pipe. I did this several more times. The next time I started the truck, no more cold start noise. That lasted for quite a while till it slowly came back.
Mike
2009 Cadillac CTS4 AWD Performance Sedan
2012 GMC Sierra AWD Denali 6.2L


 
dcarey 
Contributor
Posts: 911

Loc: Mineral, VA
Reg: 01-01-03
Re: How common is piston slap in 5.3L engines?
06-11-06 06:20 AM - Post#950613    
    In response to elcamino

Quote:

Well if seafoam helped, then the noise was carbon build up on the pistons and valves.




Yep! I still open it up when I can on the highway, as that did help my 2000 as well. Good point. Just look how much carbon gets built up in the throttle body throat.
Dave 2005 5.3 Reg Cab Shortbed 4x4


 
NC_Redneck 
Senior Member
Posts: 623
NC_Redneck
Loc: Northern California
Reg: 07-09-04
Re: How common is piston slap in 5.3L engines?
06-11-06 07:59 AM - Post#950614    
    In response to dcarey

Quote:

Well if seafoam helped, then the noise was carbon build up on the pistons and valves.

I am convinced as are many experts, its carbon and nothing else.



I am far from an expert but I would have to agree with that too.
2002 1500 Z71 Ext.Cab S.B. Victory Red 33in. Mud Terrain Tires Flowmaster Exhaust TrueFlow Cold Air Intake Kit Wester's Hot Tune 1970 El Camino


 
Squasher 
Very Senior Member
Posts: 1726
Squasher
Loc: Northern California
Reg: 07-05-02
Re: How common is piston slap in 5.3L engines?
06-11-06 08:22 AM - Post#950615    
    In response to dcarey

Quote:



Yep! I still open it up when I can on the highway, as that did help my 2000 as well. Good point. Just look how much carbon gets built up in the throttle body throat.





I have run my truck in 1st or 2nd gear while on the freeway for a few miles to try to blow out the carbon. I have not had any results. I dont want to go over the speed limit, so thats why I tried it that way to get the engine up to 5000+ RPM's. I need to find a long steep hill and try it in first again to see if the extra load will help clean things up. Some of you guys/gals who live in high humidity states may have better luck cleaning out the carbon because of the water content in the air.
2001 GMC Sierra K1500 Z71 x/cab SLT 5.3L


 
Randy_W 
None
Posts: 27804

Reg: 01-06-02
Re: How common is piston slap in 5.3L engines?
06-11-06 09:05 AM - Post#950616    
    In response to Squasher

Quote:

Quote:



Yep! I still open it up when I can on the highway, as that did help my 2000 as well. Good point. Just look how much carbon gets built up in the throttle body throat.





I have run my truck in 1st or 2nd gear while on the freeway for a few miles to try to blow out the carbon. I have not had any results. I dont want to go over the speed limit, so thats why I tried it that way to get the engine up to 5000+ RPM's. I need to find a long steep hill and try it in first again to see if the extra load will help clean things up. Some of you guys/gals who live in high humidity states may have better luck cleaning out the carbon because of the water content in the air.




It works better if you have a load. I towed a Buick through the mountains and mine has run quietly and great since, and the mpg is improved!
Randy

DON'T mess with Old Men, we didn't get old by being, STUPID!!!

"The veneer of civilization is very thin!" (Arlo)


 
millerliteliker 
Member
Posts: 94

Loc: East Texas
Reg: 04-07-03
Re: How common is piston slap in 5.3L engines?
06-13-06 05:00 AM - Post#950617    
    In response to Randy_W

Audible piston slap is NOT normal and GM knows it. To find out about this huge GM problem go to GM Piston Slap Information You will learn more than what you want to know about this huge cover-up by General Motors.

There is a reason for GM's continual market decline. I for one am not happy about the Japenese takeover of the American auto market. But attitudes like GM's regarding piston slap is just one indicator of why this is happening.
2005 GMC 2500HD Sierra SLT CC Duramax 2004 Triton TR186LE Bass Boat 1982 Camaro Z28 305 TBI Black T-Tops 19,800 miles 1983 Camaro Z28 305 TBI Red T-Tops 49,000 miles


 
normajean1064 
Member
Posts: 30

Loc: texas
Reg: 06-09-06
Re: How common is piston slap in 5.3L engines?
06-13-06 05:19 AM - Post#950618    
    In response to millerliteliker

i do a top engine clean every 20,000 gm part # 1050002 works great
2004 chevy 1500 5.3, gibson headers, gibson extreme dual exhaust, westers 89 93 dualtune. mobil 1 oil and filters GM Parts manager price chevrolet


 
HokieNav 
Senior Member
Posts: 468
HokieNav
Loc: Now racing the Beltway Ba...
Reg: 03-17-05
Re: How common is piston slap in 5.3L engines?
06-13-06 09:33 AM - Post#950619    
    In response to millerliteliker

Anyone with an axe to grind can put up a website like that, so I'm pretty skeptical of anything that they have to say. I rarely believe anything that I read on the web (except you guys, of course! )

Does anyone have any stories of this actually causing any real damage? If it were a widespread problem (actual damage, not just noise), then I imagine that GM would have to do something. Since they haven't, I assume that it isn't.
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." - Albert Einstein


 
Tip 
"6th Year" Gold Supporting Member & Chatroom Supporter
Posts: 7142
Tip
Loc: Texas-Nose in the Corner
Reg: 08-31-02
Re: How common is piston slap in 5.3L engines?
06-13-06 10:20 AM - Post#950620    
    In response to HokieNav

Wife's 99 has had the 'slap' since about 60k miles....130k now. Its so bad in the am that you'd think the pistons were trying to change holes. I'll have to run some stuff through it and see if carbon could be an issue. Chevy said "no help" and thats why I bought a Ford Harley Davidson for the next truck....and it has been a good one!!
Bob

www.picturetrail.com/TigerTip"


 
millerliteliker 
Member
Posts: 94

Loc: East Texas
Reg: 04-07-03
Re: How common is piston slap in 5.3L engines?
06-13-06 12:23 PM - Post#950621    
    In response to HokieNav

Well have you actually clicked on the link and read the website? As the past owner of a "piston slappin" 6.0L engine I can tell you it is a REAL problem. And furthermore Ford, Chrysler, Toyota, Nissan, etc. all seem to be able to make a V8 gasoline engine that doesn't sound like it is about to fall apart.

I am a Chevy lover (look at my signature) but I will not purchase the crap they turn out just because it says "Chevrolet" on the getting thinner every day sheetmetal. And from the looks of their declining market share millions of Americans agree with me.
2005 GMC 2500HD Sierra SLT CC Duramax 2004 Triton TR186LE Bass Boat 1982 Camaro Z28 305 TBI Black T-Tops 19,800 miles 1983 Camaro Z28 305 TBI Red T-Tops 49,000 miles


 
HokieNav 
Senior Member
Posts: 468
HokieNav
Loc: Now racing the Beltway Ba...
Reg: 03-17-05
Re: How common is piston slap in 5.3L engines?
06-13-06 03:18 PM - Post#950622    
    In response to millerliteliker

Certainly have - saw a bunch of biased "we think that our car shouldn't do that"

Nevermind the fact that it doesn't seem to cause any real damage, and when the engine heats up (and all the metal parts expand a little bit) things quiet down and work the right way. If they tightened things up a little bit it would be a little quieter when you started it, but when things expand, you'd have a little bit more drag (wearing things out faster, reducing gas mileage and reducing power).

I think it's a great tradeoff. I'll let the engineers do all the engineering stuff, and I'll enjoy driving my Chevy.
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." - Albert Einstein


 
Randy_W 
None
Posts: 27804

Reg: 01-06-02
Re: How common is piston slap in 5.3L engines?
06-13-06 03:55 PM - Post#950623    
    In response to millerliteliker

Quote:



I am a Chevy lover (look at my signature) but I will not purchase the crap they turn out just because it says "Chevrolet" on the getting thinner every day sheetmetal. And from the looks of their declining market share millions of Americans agree with me.




Doesn't exactly look like a decline to me!!

Sales Figures
Top 10 Pickups
Year to Date, 2005



Ford F-Series
694,690 -0.5% YTD
September 2005: 69643
September 2004: 99720


Chevrolet Silverado
570,278 +8.2% YTD
September 2005: 48051
September 2004: 77007


Dodge Ram
318,812 -3.1% YTD
September 2005: 35502
September 2004: 33690


GMC Sierra
187,371 +16.4% YTD
September 2005: 16232
September 2004: 23588


Toyota Tacoma
125,114 +4.9% YTD
September 2005: 14632
September 2004: 12040


Chevrolet Colorado
106,930 +25.5% YTD
September 2005: 7648
September 2004: 12493


Ford Ranger
99,907 -21.6% YTD
September 2005: 10105
September 2004: 13687


Toyota Tundra
91,086 +10.2% YTD
September 2005: 7253
September 2004: 8973


Dodge Dakota
86,243 +1.4% YTD
September 2005: 8921
September 2004: 8365


Nissan Titan
67,605 +15.7% YTD
September 2005: 7015
September 2004: 7903
Randy

DON'T mess with Old Men, we didn't get old by being, STUPID!!!

"The veneer of civilization is very thin!" (Arlo)


 
millerliteliker 
Member
Posts: 94

Loc: East Texas
Reg: 04-07-03
Re: How common is piston slap in 5.3L engines?
06-14-06 02:26 AM - Post#950624    
    In response to HokieNav

Quote:

Certainly have - saw a bunch of biased "we think that our car shouldn't do that"

Nevermind the fact that it doesn't seem to cause any real damage, and when the engine heats up (and all the metal parts expand a little bit) things quiet down and work the right way. If they tightened things up a little bit it would be a little quieter when you started it, but when things expand, you'd have a little bit more drag (wearing things out faster, reducing gas mileage and reducing power).

I think it's a great tradeoff. I'll let the engineers do all the engineering stuff, and I'll enjoy driving my Chevy.




That has got to be the craziest rationale advocating the virtues of piston slap that I have ever seen!! Unbelievable. Is there anything crappy enough that GM could turn out that you would NOT drive?

I guess Toyota, Nissan, Honda, Ford, Daimler-Chrysler, etc. are missing out on the piston slap feature. Maybe GM ought to loosen up the clutches in the automatic transmissions so that they will shift a little harder with a "clunk". You would probably think that was a neat feature too.
2005 GMC 2500HD Sierra SLT CC Duramax 2004 Triton TR186LE Bass Boat 1982 Camaro Z28 305 TBI Black T-Tops 19,800 miles 1983 Camaro Z28 305 TBI Red T-Tops 49,000 miles


 
millerliteliker 
Member
Posts: 94

Loc: East Texas
Reg: 04-07-03
Re: How common is piston slap in 5.3L engines?
06-14-06 02:28 AM - Post#950625    
    In response to Randy_W

Quote:

Quote:



I am a Chevy lover (look at my signature) but I will not purchase the crap they turn out just because it says "Chevrolet" on the getting thinner every day sheetmetal. And from the looks of their declining market share millions of Americans agree with me.




Doesn't exactly look like a decline to me!!

Sales Figures
Top 10 Pickups
Year to Date, 2005



Ford F-Series
694,690 -0.5% YTD
September 2005: 69643
September 2004: 99720


Chevrolet Silverado
570,278 +8.2% YTD
September 2005: 48051
September 2004: 77007


Dodge Ram
318,812 -3.1% YTD
September 2005: 35502
September 2004: 33690


GMC Sierra
187,371 +16.4% YTD
September 2005: 16232
September 2004: 23588


Toyota Tacoma
125,114 +4.9% YTD
September 2005: 14632
September 2004: 12040


Chevrolet Colorado
106,930 +25.5% YTD
September 2005: 7648
September 2004: 12493


Ford Ranger
99,907 -21.6% YTD
September 2005: 10105
September 2004: 13687


Toyota Tundra
91,086 +10.2% YTD
September 2005: 7253
September 2004: 8973


Dodge Dakota
86,243 +1.4% YTD
September 2005: 8921
September 2004: 8365


Nissan Titan
67,605 +15.7% YTD
September 2005: 7015
September 2004: 7903




GM has hit a new low of 24% share of the US market. They have not been that low since the early part of the 20th century when they were in a growth mode. In addition they have lost $462M in the 1st quarter of this year.

If you are such a big believer in the future of GM then I assume you have all of your 401K or savings invested in GM stock.
2005 GMC 2500HD Sierra SLT CC Duramax 2004 Triton TR186LE Bass Boat 1982 Camaro Z28 305 TBI Black T-Tops 19,800 miles 1983 Camaro Z28 305 TBI Red T-Tops 49,000 miles


 
boogie 
Senior Member
Posts: 2151
boogie
Loc: Louisiana
Reg: 07-11-02
Re: How common is piston slap in 5.3L engines?
06-14-06 02:48 AM - Post#950626    
    In response to Randy_W

This may not be new news to some of you but....I see GMC and Chevy full size truck sales combined surpasses Ford F-series.
'85 GMC C1500 SWB 355 sbc


 
Randy_W 
None
Posts: 27804

Reg: 01-06-02
Re: How common is piston slap in 5.3L engines?
06-14-06 06:07 AM - Post#950627    
    In response to millerliteliker

Well, you said Chevy trucks were losing market share, and as the numbers show, they aren't losing relative to other brands. Trucks in general have lost share recently, but Chevy has gained ground on the other trucks and yes Chevy and GMC combined outsell Ford trucks.
Randy

DON'T mess with Old Men, we didn't get old by being, STUPID!!!

"The veneer of civilization is very thin!" (Arlo)


 
HokieNav 
Senior Member
Posts: 468
HokieNav
Loc: Now racing the Beltway Ba...
Reg: 03-17-05
Re: How common is piston slap in 5.3L engines?
06-14-06 10:33 AM - Post#950628    
    In response to millerliteliker

Quote:

That has got to be the craziest rationale advocating the virtues of piston slap that I have ever seen!! Unbelievable. Is there anything crappy enough that GM could turn out that you would NOT drive?

I guess Toyota, Nissan, Honda, Ford, Daimler-Chrysler, etc. are missing out on the piston slap feature. Maybe GM ought to loosen up the clutches in the automatic transmissions so that they will shift a little harder with a "clunk". You would probably think that was a neat feature too.




I'm not saying it's a "feature". I'm saying that it's an engineering decision - if they had it to do all over again, I'm sure that the engineers would have tightened things up a bit, since people seem to be b#&%hing so much. But, since there is still nobody standing up to say they have an engine that has died because of piston slap, I maintain that it isn't a problem.

As far as the transmission, don't most of the tuners (FOR THE LOVE OF PETE DON'T TURN THIS INTO A BLOODY TUNING ARGUMENT OR THE CAPTAIN WILL KILL ME) do that to firm up the shifts a little bit to prolong the transmissions life (less slipping = longer life)??? If so, I's say that's a feature that lots of people find "pretty neat".
"Only two things are infinite, the universe and human stupidity, and I'm not sure about the former." - Albert Einstein


 
CaptainK 
Senior Member
Posts: 8242
CaptainK
Loc: Maryland
Reg: 02-25-02
Re: How common is piston slap in 5.3L engines?
06-14-06 11:56 PM - Post#950629    
    In response to HokieNav

'99 Silverado (NBS)


 
Randy_W 
None
Posts: 27804

Reg: 01-06-02
Re: How common is piston slap in 5.3L engines?
06-15-06 12:39 AM - Post#950630    
    In response to HokieNav

GM knew that the short piston skirt would cause some noise, but they felt that having the highest specific output as well as the best MPG amoung full size trucks was worth the trade off. That decision amoung indiduals is up to them. If whisper quiet is more important than performance and mieage, then buy a Ford.
Randy

DON'T mess with Old Men, we didn't get old by being, STUPID!!!

"The veneer of civilization is very thin!" (Arlo)


 
dcarey 
Contributor
Posts: 911

Loc: Mineral, VA
Reg: 01-01-03
Re: How common is piston slap in 5.3L engines?
06-15-06 01:51 AM - Post#950631    
    In response to Randy_W

Quote:

If whisper quiet is more important than performance and mieage, then buy a Ford.




That's because they use "quiet steel)
Dave 2005 5.3 Reg Cab Shortbed 4x4


 
Randy_W 
None
Posts: 27804

Reg: 01-06-02
Re: How common is piston slap in 5.3L engines?
06-15-06 01:55 AM - Post#950632    
    In response to Randy_W

Quote:

performance and mieage




I left out the "l".
Randy

DON'T mess with Old Men, we didn't get old by being, STUPID!!!

"The veneer of civilization is very thin!" (Arlo)


 
car24sucks 
Member
Posts: 35

Loc: Peoria, IL
Reg: 02-04-05
Re: How common is piston slap in 5.3L engines?
06-16-06 09:29 AM - Post#950633    
    In response to Randy_W

My girlfriend's '93 Honda Civic made that same noise when cold. In the winter, on really cold days, the noise never went away. That car had 175,000 miles when it was sold. It still ran good.
My '99 silverado 5.3 made that noise every time I started it. Since I've been using the correct oil, and good gas, the noise has subsided. I can still hear it on really cold mornings, but it's normally inaudible.
Beware of websites that make wild claims about severe problems (or even great products). The truth is, anything with moving parts will break eventually. You're bound to have failures in several out of millions of engines produced, even if the failure modes are random. 80% of the time, failures can be traced to assembly issues, and/or tolerance stack-up.
'12 Sierra Z71; '87 Monte Carlo SS; '63 Bel Air 4-door


 
Rokgtar1 
Member
Posts: 9

Reg: 03-23-05
Re: How common is piston slap in 5.3L engines?
06-24-06 03:23 PM - Post#950634    
    In response to car24sucks

It's funny - I just traded my 03 Suburban in (along with my 04 Silverado) on a crew cab for the family. The Suburban had CSK and piston slap pretty bad (the truck had 35k on it and didn't knock at all), but GM was not concerned - they gave me a 100k warranty and let it be at that. So I ignored it and just drove it. A few days after I traded I received a call from the dealer svc mgr who asked about the "unusually loud knock". I told him it had been warranted by GM and to contact them. He said that he would; that he was hoping that they'd help them with the engine noise (either replace the pistons or the motor altogether). The Suburban only had 65 K on it - started knocking around 22K. It's funny - the knock was not a problem when answering to the owner, but when they want to sell it - suddenly it's a problem. Glad I got rid of that thing.

 
nodakbassmaster 
Super Senior Member
Posts: 4397
nodakbassmaster
Loc: Poorhouse, SD
Reg: 03-14-04
Re: How common is piston slap in 5.3L engines?
06-24-06 09:11 PM - Post#950635    
    In response to Rokgtar1

My truck has over 144K and it slightly has the noise when cold , oil pressure is still outstanding, even by new engine standards and she runs like a raped ape... just my .02...
Richard

'09 Silverado 3500HD CC LB D/A LTZ Z71, Mods Annonymous Member #3


 
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