Oil pressure concern

[Kevin Merkley <krmerkley@xxxxxxxxx>]

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Hi,

I have been running my 313 poly engine since it was overhauled last 
spring and have a concern.

Last spring I changed the cam bearings, crank bearings, con rod 
bearings, oil pump, timing gears and chain, and stock rings.

When the engine gets warm and as it approaches operating temperature the 
oil pressure drops dramatically.  At cold start the pressure is at 60 
psi.  At a hot idle (in neutral) the pressure is close to 10.  The 
manual states that at hot idle (500 rpm) the pressure should be a 
minimum of 20 psi.  The manual also states that at 1000 rpm the pressure 
should be between 45-65 psi.

At 1000 rpm I get 30 psi.

The filter is new and the engine has about 2 hours running time on since 
overhaul and approximately 10 miles.

What are the likely problems that could cause the low oil pressure?

btw, the engine sounds fine and does not knock or anything out of the 
ordinary.

I am spooked and expect that after the car comes back from the paint 
shop it will have the engine yanked and torn apart again.  I'm not 
pleased but do not know what things to look for.

Please help.

Thanks.

K.


Kevin R. Merkley
Thunder Bay, Ontario
64 Dodge 440 2dr HT (Cdn)

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