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Username Post: 454 Leaky Rear Freeze Plug        (Topic#165647)
MustangDon 
Member
Posts: 150

Loc: Mustang, Oklahoma USA
Reg: 10-07-03
07-26-07 06:45 AM - Post#1217069    

Hello All,
I have a leaky rear freeze plug in my 454 engine. How can I remove it without knocking it inside the block?
Thanks,
Don
57 Chevy 305/PG (Ole Blue) 79 Grand Prix 4 speed (Blackie) 86 Vet Conv. (Fast Red) 88 GMC Truck (Big Blue) 93 Cad F/W (Daily Driver) 94 Z28 468 BBC/700R4 (Mean Green) 99 Cad ETC (Weekend Driver)


 
CDAUSA 
Needs to Get Out More Member
Posts: 12906

Loc: Texas Panhandle
Reg: 12-31-01
07-26-07 07:16 AM - Post#1217091    
    In response to MustangDon

Rear? As in the flywheel area?

It's easily done, knock the plug in on one side, it will pivot in the bore so you will see the cupped edge sticking out. Either lay a bar or large screwdriver in that cup and pry off the plug boss, it will pull right out. Or, some people clamp vise grips on the edge and hammer/wedge it out. I like the bar way alot better, if you have any kind of room

 
MustangDon 
Member
Posts: 150

Loc: Mustang, Oklahoma USA
Reg: 10-07-03
07-26-07 07:24 AM - Post#1217093    
    In response to CDAUSA

CDAUSA,

Thanks for the information. I was just not sure how to handle it. The BBC is in my 94 Z28, but I thought this forum would have the best information on a 454. Now I got to pull the transmission to get to them. I just pulled the transmission on my truck last month for leaks. That lift and transmission jack are earning there money this summer!
Thanks again,
Don
57 Chevy 305/PG (Ole Blue) 79 Grand Prix 4 speed (Blackie) 86 Vet Conv. (Fast Red) 88 GMC Truck (Big Blue) 93 Cad F/W (Daily Driver) 94 Z28 468 BBC/700R4 (Mean Green) 99 Cad ETC (Weekend Driver)


 
MustangDon 
Member
Posts: 150

Loc: Mustang, Oklahoma USA
Reg: 10-07-03
07-26-07 10:29 AM - Post#1217230    
    In response to MustangDon

CDAUSA,
I reread your reply, and yes, it is leaking from behind the engine block below the heads and intake manifold , and forward of the flexplate on the block. I can not see the freeze plug, but I do not know what else is back there that would leak radiator fluid.
Don
57 Chevy 305/PG (Ole Blue) 79 Grand Prix 4 speed (Blackie) 86 Vet Conv. (Fast Red) 88 GMC Truck (Big Blue) 93 Cad F/W (Daily Driver) 94 Z28 468 BBC/700R4 (Mean Green) 99 Cad ETC (Weekend Driver)


 
Big Steve 
Frequent Contributor
Posts: 1131
Big Steve
Loc: Riverside, CA
Reg: 04-17-06
07-26-07 10:46 AM - Post#1217244    
    In response to MustangDon

Do yourself a favor, and as long as you're in there replacing the one that's leaking now, replace the other one as well. If your luck is anything like mine, it will start leaking too as soon as you replace the one that's leaking now. make sure to use brass replacements.
I may be getting older but I refuse to grow up.

'93 Silverado Extra Cab Sportside
'99 Suburban (My wife's but I get to wash and work on it)
'69 Buick Riviera project car


 
MustangDon 
Member
Posts: 150

Loc: Mustang, Oklahoma USA
Reg: 10-07-03
07-26-07 01:31 PM - Post#1217339    
    In response to BIGg Steve

CAtech,
Sounds like a good idea!
Don
57 Chevy 305/PG (Ole Blue) 79 Grand Prix 4 speed (Blackie) 86 Vet Conv. (Fast Red) 88 GMC Truck (Big Blue) 93 Cad F/W (Daily Driver) 94 Z28 468 BBC/700R4 (Mean Green) 99 Cad ETC (Weekend Driver)


 
Big Steve 
Frequent Contributor
Posts: 1131
Big Steve
Loc: Riverside, CA
Reg: 04-17-06
07-26-07 01:54 PM - Post#1217354    
    In response to MustangDon

What I've usually found works well is to tap in one dge of the plug so it pivots in the hole, then grab it with a pair of channelocks to pop it out. Even if it ends up dropping into the block, you can still usually fish it out to the point where you can grab it with Channelocks. The original plug should be steel, so if necessary you can snag it with a magnet if it falls in. Not knowing whether you have any previous experience changing freeze plugs, I will also tell you that the easiest way to drive in the new one is to find a socket that fits just inside the cup, and use that as a driver to drive the plug in. With the limited clearance in back of the engine, this will probably work OK.
I may be getting older but I refuse to grow up.

'93 Silverado Extra Cab Sportside
'99 Suburban (My wife's but I get to wash and work on it)
'69 Buick Riviera project car


Edited by CAtech on 07-26-07 01:55 PM. Reason for edit: No reason given.

 
MustangDon 
Member
Posts: 150

Loc: Mustang, Oklahoma USA
Reg: 10-07-03
08-01-07 12:09 PM - Post#1221881    
    In response to BIGg Steve

Well, I got the transmission out and the right rear freeze plug was leaking. It looked like part of the center of the plug at the ring was cracked or rusted. The center came completely out when I removed it from the block. I was able to fish it out of the block with my fingers. It was a brass one, so maybe it was damaged upon installation! Is there any sealant to use upon reinstallation?
Thanks,
Don
57 Chevy 305/PG (Ole Blue) 79 Grand Prix 4 speed (Blackie) 86 Vet Conv. (Fast Red) 88 GMC Truck (Big Blue) 93 Cad F/W (Daily Driver) 94 Z28 468 BBC/700R4 (Mean Green) 99 Cad ETC (Weekend Driver)


 
CDAUSA 
Needs to Get Out More Member
Posts: 12906

Loc: Texas Panhandle
Reg: 12-31-01
08-01-07 12:33 PM - Post#1221896    
    In response to MustangDon

I always just put enough silicone on there so you know it (bore) has some, drive it in. I have a good sized 1 1/8" socket that just fits the ID, and a broken extension that I use as a driver. (Socket is turned around backwards)

If your other one looks OK, and is brass, doesn't have that ring where someone must have used a bad tool, I think I would leave it.

 
MustangDon 
Member
Posts: 150

Loc: Mustang, Oklahoma USA
Reg: 10-07-03
08-01-07 12:43 PM - Post#1221904    
    In response to CDAUSA

Thanks for the information, Don
57 Chevy 305/PG (Ole Blue) 79 Grand Prix 4 speed (Blackie) 86 Vet Conv. (Fast Red) 88 GMC Truck (Big Blue) 93 Cad F/W (Daily Driver) 94 Z28 468 BBC/700R4 (Mean Green) 99 Cad ETC (Weekend Driver)


 
CDAUSA 
Needs to Get Out More Member
Posts: 12906

Loc: Texas Panhandle
Reg: 12-31-01
08-01-07 12:49 PM - Post#1221909    
    In response to MustangDon

I blew by Mustang last weekend, I waved when I went by, didja see me?

 
MustangDon 
Member
Posts: 150

Loc: Mustang, Oklahoma USA
Reg: 10-07-03
08-01-07 01:30 PM - Post#1221929    
    In response to CDAUSA

I miss ya! I was down south in Marlow this weekend with the wife's family reunion. Had way to much fun with her side of the family! All of the eating and drinking is tuff on an ole guy!
Don
57 Chevy 305/PG (Ole Blue) 79 Grand Prix 4 speed (Blackie) 86 Vet Conv. (Fast Red) 88 GMC Truck (Big Blue) 93 Cad F/W (Daily Driver) 94 Z28 468 BBC/700R4 (Mean Green) 99 Cad ETC (Weekend Driver)


 
CDAUSA 
Needs to Get Out More Member
Posts: 12906

Loc: Texas Panhandle
Reg: 12-31-01
08-01-07 01:39 PM - Post#1221937    
    In response to MustangDon

Too damned humid over there

 
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