Rear Main Seal install - The 1947 - Present Chevrolet & GMC Truck Message Board Network

RapidRide2 · 12-08-2004, 10:11 PM

Shoooo,,, it has been a month since i have been able to log onto this board???? Why i have no idea,, but was able to log in tonight. My question is as follows,,, Can a rear main seal be replaced on an 83' gmc full size 1/2 ton automatic 305 without jacking up the motor???? Will the pan clear the oil pump pickup and crossmember simultaneously?????? Also,,, has anyone ever had any success with the new one piece oil pan gaskets???? P.S. is the rear main the only thing that would leak without the engine running??? quite a bit of oil is dripping down onto my crossover pipe then the ground. The truck has hardly been driven.

SanitysBane · 12-08-2004, 11:01 PM

yes the oil pan will clear with out jacking up the engine, it did on my C10

Devil'S Ride · 12-08-2004, 11:12 PM

The oil pan should clear, if I remeber correctly, and yes, get the fel pro one piece gasket....it is WELL worth the money...I have used them several times now, and I believe Fel Pro has found a winner!

**Captkaos** · 12-09-2004, 06:52 PM

I replace my oil pump not 2 months ago. Definitely not a problem.

loblazer · 12-10-2004, 01:44 PM

Ok guys, can you give a little more info on how to do this? Mine is leaking too. I have heard it can be done with the two piece, how do I get it done if I buy a Fel pro?

Thanks, Doug

12-08-2004, 10:11 PM	#1
RapidRide2 Registered User Join Date: May 2004 Location: Saint Louis Posts: 76	Rear Main Seal install Shoooo,,, it has been a month since i have been able to log onto this board???? Why i have no idea,, but was able to log in tonight. My question is as follows,,, Can a rear main seal be replaced on an 83' gmc full size 1/2 ton automatic 305 without jacking up the motor???? Will the pan clear the oil pump pickup and crossmember simultaneously?????? Also,,, has anyone ever had any success with the new one piece oil pan gaskets???? P.S. is the rear main the only thing that would leak without the engine running??? quite a bit of oil is dripping down onto my crossover pipe then the ground. The truck has hardly been driven. Last edited by RapidRide2; 12-08-2004 at 10:29 PM.

12-08-2004, 11:01 PM	#2
SanitysBane Registered User Join Date: May 2004 Location: Lubbock, Texas Posts: 2,121	yes the oil pan will clear with out jacking up the engine, it did on my C10 __________________ '96 Nissan Pathfinder '02 Firebird Trans Am. '88 K5 Blazer

12-08-2004, 11:12 PM	#3
Devil'S Ride Registered User Join Date: Nov 2003 Location: Grants PassOregon Posts: 335	The oil pan should clear, if I remeber correctly, and yes, get the fel pro one piece gasket....it is WELL worth the money...I have used them several times now, and I believe Fel Pro has found a winner! __________________ The Devil 1983 ONE TON 454/400/208 11" of lift on 44's

12-09-2004, 06:52 PM	#4
Captkaos www.73-87chevytrucks.com Join Date: Dec 1999 Location: Birmingham, AL Posts: 6,935	I replace my oil pump not 2 months ago. Definitely not a problem. __________________ Chris Lucas 1973 Chevy C-10 1978 GMC Jimmy (2WD) - SOLD 1987 R10 twin turbo LS 1991 R3500 SRW CrewCab 1985 K5 diesel swapped project 1989 K5 2WD conversion w/ Vette susp Project Captkaos Customs 73-87chevytrucks.com

12-10-2004, 01:44 PM	#5
loblazer Senior Member Join Date: Mar 2004 Location: Fergus, Ontario Posts: 481	Ok guys, can you give a little more info on how to do this? Mine is leaking too. I have heard it can be done with the two piece, how do I get it done if I buy a Fel pro? Thanks, Doug



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