rear main seal - The 1947 - Present Chevrolet & GMC Truck Message Board Network

mattpiotr · 01-08-2012, 11:20 PM

im pretty sure the rear main seal is leaking on my 86 gmc 2500. its leaking around the bell housing but then again its also leaking of the front diff. so its got me thinking its either the rear main seal or oil pan gasket i plan on changing the oil pan gasket on the next oil change since its easy but just wanted to know if it is the rear main seal if anybody has used the rear main seal stop leak and did it work at all?

INSIDIOUS '86 · 01-08-2012, 11:33 PM

Stop leak products turn all ALL your engine seals to mush they are a temporary fix and great to run for a weak to sell to the dealer
Posted via Mobile Device

mongoose · 01-08-2012, 11:45 PM

its a once piece seal... I'd just change it out... way easier than a 2 piece.. just need to unblolt the trans.

INSIDIOUS '86 · 01-09-2012, 01:35 AM

Quote:

Originally Posted by mongoose

its a once piece seal... I'd just change it out... way easier than a 2 piece.. just need to unblolt the trans.

it may or may not be, I belive in late 85 they transitioned to one piece for passenger vehicles and it was later for trucks at either rate he still has to drop the pan to unbolt it

rs72z · 01-09-2012, 08:53 AM

I was thinking that all the trucks went to one piece in 86?

motornut · 01-09-2012, 09:52 AM

thought the dipstick drivers side was 2
pass side was one

mongoose · 01-09-2012, 12:59 PM

Quote:

Originally Posted by INSIDIOUS '86

it may or may not be, I belive in late 85 they transitioned to one piece for passenger vehicles and it was later for trucks at either rate he still has to drop the pan to unbolt it

I know the cams stayed untill later but the seals changed too.. So centre bolt heads probably a 1 piece seal..

Should be able to be slipped out like a balancer seal or rotor seal etc. Though I could be wrong.. Drawing a blank honestly how it sits in the aluminum piece.. Even though I've torn down hundreds lol.. Kinda sad
Posted via Mobile Device

mattpiotr · 01-09-2012, 05:37 PM

the dip stick is on the passanger side....or what about that lucas oil oil stablizar?

01-08-2012, 11:20 PM	#1
mattpiotr Registered User Join Date: Oct 2011 Location: Michigan City, Indiana Posts: 158	rear main seal im pretty sure the rear main seal is leaking on my 86 gmc 2500. its leaking around the bell housing but then again its also leaking of the front diff. so its got me thinking its either the rear main seal or oil pan gasket i plan on changing the oil pan gasket on the next oil change since its easy but just wanted to know if it is the rear main seal if anybody has used the rear main seal stop leak and did it work at all?

01-08-2012, 11:33 PM	#2
INSIDIOUS '86 Registered User Join Date: Jul 2009 Location: washington Posts: 4,178	Re: rear main seal Stop leak products turn all ALL your engine seals to mush they are a temporary fix and great to run for a weak to sell to the dealer Posted via Mobile Device __________________ 377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511

01-08-2012, 11:45 PM	#3
mongoose Registered User Join Date: Feb 2009 Location: slurrey, bc. Posts: 1,134	Re: rear main seal its a once piece seal... I'd just change it out... way easier than a 2 piece.. just need to unblolt the trans. __________________ -'73 c/10 - Low with Go - will be complete... probably never. -'90 2wd Blazer - well... soon enough anyways. -'84 SWB - the daily gas guzzler.

01-09-2012, 08:53 AM	#5
rs72z Registered User Join Date: Oct 2011 Location: Emory TX Posts: 900	Re: rear main seal I was thinking that all the trucks went to one piece in 86?

01-09-2012, 09:52 AM	#6
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: rear main seal thought the dipstick drivers side was 2 pass side was one __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350

01-09-2012, 05:37 PM	#8
mattpiotr Registered User Join Date: Oct 2011 Location: Michigan City, Indiana Posts: 158	Re: rear main seal the dip stick is on the passanger side....or what about that lucas oil oil stablizar?



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.