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Old 12-30-2009, 10:32 PM
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Oil pressure issues this maybe some of the problem.

I have seen on all GM rear caps SBC & BBC we have found then to be restricted because of the casting hangs in past the oil port of the oil pump and we have seen some that have been block 60%

Take a oil pump cut it off like the one on the right.

The cap on the left has been opened up to match the oil pump.

The cap in the middle had been marked with a marker showing how much has to be removed.

The cap on the right you can look in the oil port and see the casting blocking the port.

Even on the after market blocks they some times have to be touched up.

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Old 12-31-2009, 02:50 AM
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Its a little known mod and few people know about the issue, thanks for brining it up again and showing the proper method to solve the problem!

With pics yet!
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Old 12-31-2009, 06:39 AM
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That's great info!! Thanks for the quick study
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Old 12-31-2009, 08:01 AM
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I wonder if GM knows this?
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