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MGB MGB Motor Rebuild - Gaskets

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Lynn Kirkpatrick

Lynn Kirkpatrick

Jedi Hopeful
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I'm rebuilding this '71 B motor. I'm using the Payden gasket sets. In the Lower set there are 3 cork, straight rectangular strips. One fits the groove in the bottom of the front main bearing cap pretty well. The other 2 are thinner. Just one isn't quite thick enough to fit the rear main bearing cap groove. Am I missing one for the rear? Should I stack the 2 thin ones?

I asked Moss and they said they go in the sides of the rear cap. Huh??? I can imagine that there may be odd extras to fit older and newer series, what goes in the rear?

Also, the front one is in place, but it is kind of thick. Will the pan pull it down flush and seal OK? The original fit flush, of course.

Any explanation will be greatly appreciated. Thanks!
 
The two thin small ones go in groves in the main bearing cap. They sorta push down in the groove. The other one (thick) you have to play with a little. I found one fits snug and had to change it around. Moss was right, the two little ones go in the rear cap on the sides.
 
I guess I'm still confused. I have 3 rectangular seals. There is a slot on the bottom edge of the front main bearing cap and a slot on the bottom of the rear main bearing cap. Looking at my pictures and racking my brain I don't remember a slot on the rear cap any place but on the bottom, where the pan contacts. There was nothing on the sides, it fit tight and I had to tap it into the block. The thick seal fits the deeper front slot. One of the thin seals is too thin for the rear slot. Both stack up too high.

Looking at the rear of the rear main bearing, there appears to be a groove that sort of lines up with OD of the flywheel flange. There was nothing in that groove when I tore it down. Should there be?

What am I missing here?
 
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