Reproduction Parts for 1916-1964 Chevrolet Passenger Cars & 1918-1987 Chevrolet & GMC Trucks



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#374697 09/01/16 03:45 PM
Joined: Aug 2016
Posts: 20
Buddyp Offline OP
Grease Monkey
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Grease Monkey
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Posts: 20
Oil is leaking between the back of the oil pan and the clutch housing.
It can't be a rear main seal because the '28 National Coach appearently
didn't have one!Right?OK,then why can I not find a replacement, or have
I not looked in the right place?Oil pan gasket maybe?
Any help or suggestions welcomed.
Thanks,
Buddyp
BRBud


BRBuddyp or KI4BR
Filling Station - Chevrolet & GMC Reproduction Parts


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Buddyp #374698 09/01/16 04:46 PM
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Could be the rear pan gasket or a rear main bearing that has two wide a gap. Any gap between crankshaft and main bearing over 0.002" is likely to leak. The wider the gap the more oil will leak. A teeny leak is normal.


How Sweet the roar of a Chevy four!
Buddyp #374699 09/01/16 04:48 PM
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You need to check clearence on main bearings. If the rear main is over .002 it will leak. also check the drain hole and ball cheak in the rear cap.

chevy1937 #374706 09/01/16 06:07 PM
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Shade Tree Mechanic
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Shade Tree Mechanic
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Yes, sounds like excessive rear (or perhaps all) main bearing clearance issues to me too.

Regards
Al

Chipper #374708 09/01/16 08:15 PM
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Buddyp Offline OP
Grease Monkey
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OK,so are you suggesting I get out the plasti-gauge and plan on
removing a shim or two?
As you can guess,this stuff is new to me but i'm not too old to
learn something,from those willing to help.
Thanks,
BRBud


BRBuddyp or KI4BR
Buddyp #374709 09/01/16 08:35 PM
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Yes, but if you do it from under the car you need to support the weight of the crank.


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