lost most oil pressure

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May 11, 2008 | 03:10 AM

Jammer

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lost most oil pressure

408 ci. when cold it was about 40 psi, within minutes recently it was 20 psi.. then 10 psi at idel these past few weeks. fresh oil, didnt replace filter. Made a 130 run and lost all oil pressure at idle now..10 psi at like 2500-3k rpm so I shut her down. I hear a tinking noise..not really a ticking..but uneven rattle. No knock. Not sure where to start but this was one of Jellys APE 408's, which many have had cam bearings fail.. any thoughts on best way to find the culprit.. or just yank and rebuild. Figured Id try and do a filter change 1st, but not many miles on motor (2500) and 3 filters in that time.

BTW, making 700 rw at 12ish lbs on this..twin T-60's.

May 11, 2008 | 03:41 AM

99blancoSS

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shavings in the oil?

May 11, 2008 | 09:27 AM

Jammer

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just did it..so havnt looked... but nothing obvious on dipstick..will pull oil tonight

May 12, 2008 | 10:57 PM

Jammer

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Oil looks pretty good
.. I;m guessing cam bearings, since most of APE's motors had such issues.

May 12, 2008 | 10:59 PM

99blancoSS

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Yeah thats not good

May 13, 2008 | 08:50 PM

Urslozum

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cam bearings??????

I was just wondering if you checked to see if that oil pump o-ring was torn....that will definately cause the symtoms you have. Just an idea....

May 13, 2008 | 09:52 PM

427

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That does not sound good......
Cut the filter open and look inside, it will tell the story.

Kurt

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May 14, 2008 | 10:29 AM

Jammer

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Quote:

Originally Posted by Urslozum

I was just wondering if you checked to see if that oil pump o-ring was torn....that will definately cause the symtoms you have. Just an idea....

Not yet bro.. just getting all the accessories/wires/plumbing out of the way still/.

May 14, 2008 | 04:13 PM

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trans2000am

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From: detroit

i call up w2w im having some problem (iron 370) pressure is fine on start up but once i put stress on motor starts to drop down to 20psi i have no engine noise changed oil nothing......the guy i talked to said to check oring and to see if they put the shim in my oil pump.

May 14, 2008 | 05:00 PM

#11

Jammer

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Quote:

Originally Posted by trans2000am

I did contact w2w... but my issue was dif... 0 oil pressure at idel. Im still betting cam bearings... will post up in 2 weeks once swap takes place and I dismantle.