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oil leak between trans and plate..78mgb

Moss Motors
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phil1n2 phil campagna
USA   USA
please tell me its not a rear engine seal?

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dickmoritz Avatar
dickmoritz Platinum Member Dick Moritz
Philly 'burbs, PA, USA   USA
Make sure it's not oil running down and back from the common leak sources, like tappet cover gaskets, rocker cover gasket, inverted oil filter assembly, or even one of the oil hoses behind the distributor.

The good news? It may not be the rear engine seal.

The bad news? It may be the front gearbox seal.

Either way, it's engine out... eye popping smiley

Dick



Errabundi Saepe, Semper Certi
(Often wrong, but always certain)

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tvrgeek Avatar
tvrgeek Scott S
Hillsborough, North Carolinia, USA   USA
1965 MG MGB
It is. And as I learned from Glenn T, all seals are not the same. I did the one from Moss and it leaked as much as the original. Different seal as supplied in the new backplate for my 5-speed, no leak.



Cogito ergo sum periculoso

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ingoldsb Avatar
ingoldsb Silver Member Terry Ingoldsby
Calgary, AB, Canada   CAN
1971 MG MGB
Also be suspicious of the little cork strip underneath the oil pan - the one that goes between the rear plate and the engine block.

But yes, it is probably the rear seal. You probably need to change the clutch and throwout bearing anyway. winking smiley



Terry Ingoldsby
terry.ingoldsby@DCExperts.com

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Crownvicjohn Silver Member John P
Wolcott, CT, USA   USA
1980 MG MGB Limited Edition (LE) "The Roadster"
1995 Buick Roadmaster "The Woody"
2011 Ford Crown Victoria "The Vic"
Mine was a bad rear plate gasket. Engine out for that too.

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GTMattZ Avatar
GTMattZ Matt Zimmerman
Winnemucca NV, USA   USA
1980 MG MGB "Blue RB"
I am in a similar boat. Took the engine/tranny out to deal with what I thought was a leaky rear main, but when I started getting into things I found that the rear tappet cover gasket was completely shot... The whole side of the engine below that cover was an oily mess. Me being the lazy bum I am really do not want to split the engine and tranny to replace the seal if I don't have to. So I bought new tappet cover gaskets, cleaned it all up and am in the process of putting everything back. I am hoping the oil was all from the bad tappet cover gasket, but if the leak is still present I will just let it slide until I rebuild the engine next year. The thing is, with the stock manifold and cat in my car I was not able to really get good access to that cover, so it was not until I had the engine out and started pulling the stock manifold off that I saw the state of that side of he engine.

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ls1ac Avatar
ls1ac scott sommer
bristol , Englewood, wi , Fl, USA   USA
Clean the bottom of the engine, then run for a while and check the color of the oil leaking .If clean probably trans if darker like the engine oil, well you get the idea. Out of luck if you just changed the engine oil.
Sometimes I get lucky and have some of each. Rats

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