Main bearing shells - fitting procedure question

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simonc
Posts: 86
Joined: Tue Sep 03, 2002 6:35 am
Location: St Albans, UK
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Main bearing shells - fitting procedure question

Post by simonc »

When fitting new main bearing shells what is the procedure regarding the position of the oil feed holes? On a pair of bearings one half has two oil feed holes and teh other half has none. What I am interested in is does the half with the feed holes fit into the block or into the main bearing cap? Is there a preffered way to fit these?

Simon
Simon in the UK

1973 246GT Dino
1976 365 Boxer
1977 400 Auto
DWR46
Posts: 621
Joined: Tue Sep 22, 2009 8:23 pm

Re: Main bearing shells - fitting procedure question

Post by DWR46 »

The oil feed holes go into the bearing cap. The oi flows around the outside of the bearing shell and enters from the bottom of the crank to help support the crank as it is loaded from cylinder firing. That is why the bearing caps have the groove cut into them so the oil can flow to the feed holes.
simonc
Posts: 86
Joined: Tue Sep 03, 2002 6:35 am
Location: St Albans, UK
Contact:

Re: Main bearing shells - fitting procedure question

Post by simonc »

Thank you, that is how I was taught but just wanted to be sure I was remembering it correctly.
Simon in the UK

1973 246GT Dino
1976 365 Boxer
1977 400 Auto
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