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1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Main bearing cap bad?

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Old Aug 19, 2022 | 06:04 PM
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Main bearing cap bad?

Just got all my parts back from the machine shop and I'm looking over everything. I noticed some pitting/missing metal on the rear one. Could this contribute to a rear main leak? Should I get a replacement cap?
 
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Old Aug 19, 2022 | 07:30 PM
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Looks like a piece broken out of it.
 
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Old Aug 19, 2022 | 08:01 PM
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You are supposed to daub sealer on each side in that area anyway. So I don't see it affecting too much.
 
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Old Aug 19, 2022 | 09:04 PM
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Originally Posted by Franklin2
You are supposed to daub sealer on each side in that area anyway. So I don't see it affecting too much.
X2 that is on the oil pan seal side not the rear main seal or the bearing.

BTW if you get a new rear main bearing cap you will need to take the block & all bearing caps back to the machine shop and have them line hone it to make it true again with the other caps.
Dave ----
 
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Old Aug 19, 2022 | 11:02 PM
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Awesome, I'll just use some sealant and just send it. Thanks guys.
 
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Old Aug 20, 2022 | 03:14 PM
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Originally Posted by FuzzFace2
X2 that is on the oil pan seal side not the rear main seal or the bearing.
You need a thin smear of sealer where the two main caps come together metal to metal. This is not the oil pan side, this is between the OD of the rubber seal, and the outer part of the main cap.
 
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Old Aug 20, 2022 | 03:19 PM
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Here''s a picture.



 
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Old Aug 21, 2022 | 05:00 AM
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Originally Posted by Franklin2
Here''s a picture.


I was talking of were it looks broken (on my phone) that he posted about.
But yest a thin smear of sealer there.
Dave ----
 
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