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Username Post: oil leak on an 84 s10 2.8l v6        (Topic#219498)
84 chevy10 
Forum Newbie
Posts: 23

Age: 23
Loc: salem new jersey
Reg: 06-08-09
06-18-09 03:14 PM - Post#1719493    

i have an oil leak but can not find out where it is coming from i degreased the whole motor and still no luck.p it drips from the back of the motor onto the tranny and then it sprays all over eveything. i powerwashed it all and still cannot find it and is getting really frustrating any help is greatly appreciated thanks timmy


 
ExtraScrews 
Senior Member
Posts: 284

Loc: Kansas, USA
Reg: 08-19-04
06-18-09 05:47 PM - Post#1719583    
    In response to 84 chevy10

I used to have an 84. It leaked oil from that nifty 2-piece rear main seal. Could that be where yours leaks from?
1995 S10 (4.3 5-speed)

What is your malfunction?


 
69 SS396 
Frequent Contributor
Posts: 2472
69 SS396
Age: 53
Loc: Lakeland, Fl
Reg: 11-30-08
06-19-09 04:43 AM - Post#1719743    
    In response to ExtraScrews

Rear of intake manifold? Oil pressure sender?
The fate of empires depends on the education of youth-Aristotle

Kids will be kids, but parents should be parents.
Sean

http://www.picturetrail.com/myelkyss
1969 El Camino SS396 "Misty Meaner"


 
84 chevy10 
Forum Newbie
Posts: 23

Age: 23
Loc: salem new jersey
Reg: 06-08-09
06-20-09 05:29 PM - Post#1720499    
    In response to 69 SS396

dont can not see anywhere that is leaking on top the motor it starts about 3/4 down the motor i had a guy look at it and told me not to worry about cuz it wasnt and head gasket or anything serious but i am going to find it and fix let you know what i find out


 
JaVeRo 
Member
Posts: 306

Loc: East Texas
Reg: 02-02-06
06-20-09 09:55 PM - Post#1720617    
    In response to 84 chevy10

I had an 87 2.8 that started leaking around the distributor housing. If I remember right, it had an o-ring seal and below the o-ring was oil under pressure from the oil pump. It was an easy fix after my neighbor told me what the problem was.

James
2003 S10 Blazer 4wd (wife's)
2001 S10 Crew Cab (wife's mail truck)
1996 K1500 (mine)
1979 GMC 3/4 ton 2wd 4spd with a "Gilley's" bumper sticker, my first brand new truck.
2006 K1500 Company Truck
2006 K2500 NV4500 4.10's


 
gchemist 
Senior Chevytalk Moderator
Posts: 21783
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
06-21-09 06:29 PM - Post#1720995    
    In response to JaVeRo

I have a similar problem. One day, I'll track it down. I suspect the oil cooler lines. I installed a new lines not too long ago.
'83 Silverardo XST - ZZ4 powered
'96 GMC Jimmy LS Ret. @236651 miles


 
LSGarage 
Forum Newbie
Posts: 4

Loc: Mechanicsburg, PA
Reg: 06-22-09
06-22-09 04:22 PM - Post#1721507    
    In response to gchemist

The valve covers on this engine cover a part of the intake manifold. There is a seam or joint where the intake stops and the head begins. Sometimes this joint is uneven. If you think it is leaking from the valve covers, try to use some RTV at the joints when installing new gaskets. I had this problem on my '86 S-10 2.8 TBI engine.

 
84 chevy10 
Forum Newbie
Posts: 23

Age: 23
Loc: salem new jersey
Reg: 06-08-09
06-24-09 06:54 PM - Post#1722829    
    In response to LSGarage

dude im gettin really mad i cant find this leak i have taken all the vacum lines out and took the carb off and the intake off and nothing

 
ELKYTM 
Very Senior Member
Posts: 1225
ELKYTM
Age: 39
Loc: Vicksburg, Michigan
Reg: 03-09-01
07-18-09 07:07 AM - Post#1737190    
    In response to JaVeRo

  • JaVeRo Said:
I had an 87 2.8 that started leaking around the distributor housing. If I remember right, it had an o-ring seal and below the o-ring was oil under pressure from the oil pump. It was an easy fix after my neighbor told me what the problem was.

James



This is probably where his leak is. This is a very common place for the 2.8's to leak. It is often mistaken for a rear main leak.
I bought a 2.8 Camaro a few years ago for $200 that the owner thought had a rear main leak. It was the $2 O-ring on the dist, sold that Camaro for $800 after fixing
'52 Chevy convert
'94 S10 4x4


 
TDS-OF-MN 
Senior Member
Posts: 575

Loc: Minneapolis, MN USA
Reg: 07-09-01
07-28-09 02:07 PM - Post#1743534    
    In response to ELKYTM

I experienced both the distributor O-ring seal, and the Oil Pressure sending unit leak, on my '88.

When you say it drips from the back of the motor, I'd bet it's probably the O-ring at the distributor. I believe that will only leak when the oil is under pressure, so finding it with the motor off might be difficult.

Good luck!
TomS.
'85 1/2ton 4x4 Pickup
305 w/ Quadrajet, 700R4, NP 208, 3.08 gears, Destination A/T's, rust
'98 Blazer 4x4, 4dr - stock

'70 Camaro-sold 10-4-08
'88 S-10 Blazer 4x4 (stolen 4-23-06 = recovered as total loss)


 
Chevytech 
Subject Matter Expert - Senior Member
Posts: 2963

Loc: Twin Cities, Minnesota, U...
Reg: 04-25-04
07-28-09 05:33 PM - Post#1743674    
    In response to 84 chevy10

If I remember correctly a 1984 2.8 had a rope rear main seal on the crankshaft and they often disintegrated into pieces and would get stuck in the plug up the oil pump pickup screen.
For those of you that are wondering why you are not getting replies to your thread:

Did you give the model, year, engine, fuel system type, and transmission information?

If the it has been altered from stock let us know about that too.


 
onebrucelee 
Forum Newbie
Posts: 1

Reg: 12-16-09
12-16-09 04:59 PM - Post#1825240    
    In response to Chevytech

I must say after replacing 3 of these engines and now pulling again for an oil leak again i have found out that these engines form a lip on the crankshaft also known as a wear spot! and when engine heats up the drip will become worse, if the flex plate cover is off it will spray all over while driving. to fix this issue they sell whats called a seal saver which goes onto crankshaft thus giving new seal a nice surface.

 
ltlvt 
Senior Member
Posts: 1635

Age: 62
Loc: Wichita Falls Texas USA
Reg: 09-17-00
04-27-10 09:18 AM - Post#1905622    
    In response to onebrucelee

Mine was the o-ring already mentioned on the distributor.
Runs like a Scalded Dog!!


 
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