RE: Oil pressure concern

[Jeff Mullen <dodge65500@xxxxxxxxx>]

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for the record, i was reading an article on a race engine builder a while back (it might've been dan dvorak, but i'm not sure) they were saying that an engine needs 10 psi per 1000 rpm as a bare minimum i.e. 5psi @ 500 rpm, 10psi @ 1000 rpm, etc. i personally like it a lot higher,, but it's probably not a bad rule of thumb as a minimum

Scott Powell <skpowell@xxxxxxxxxxxx> wrote:[AD removed for archives]
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Hi Kevin,

If I'm not mistaken, The LA pump interchanges with our poly engines. Look up the specs on the LA engine and (if my
memory is still OK) you may just find that the pressures are just dandy for an LA engine. As was mentioned earlier, you
don't need gobs of oil pressure for adequate lubrication. Surely bearing technology is favourably different from fourty
some odd years ago. If, however, you find this issue keeping you awake at night, I would replace the oil pump with a
high volume unit and rest easy. Hope this helps.

Scott Powell -=- Cobourg, ON, Canada
Email: mailto:skpowell@xxxxxxxxxxxx
Website: http://www3.sympatico.ca/skpowell
'62 Belvedere (313/auto) -=- '76 Volare RR (360/4spd)
'83 Cordoba (318/auto) -=- '93 W150 (318/auto) -=- '95 Intrepid (3.3/auto)

-----Original Message-----
From: Kevin Merkley [mailto:krmerkley@xxxxxxxxx] 

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.

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Please address private mail -- mail of interest to only one person -- directly to that person.  I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic.  Thanks!

'62 to '65 Mopar Clubhouse Discussion Guidelines:
http://www.1962to1965mopar.ornocar.org/mletiq.html. 



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