| Author |
Message |
    
Warren Basil
Member
Username: wbasil
Post Number: 11
Registered: 06-2006
| | Posted on Wednesday, October 07, 2009 - 02:22 pm: | 
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I am having an issue with one of my Chrysler 360's holding oil pressure. When it starts up cold the oil pressure reaches about 65psi. After it runs about 1/2 hour under a load the pressure goes down to about 15ps to 20 psi. The other engine stays about 40psi. Any ideas what is happening? I put a mechanical gauge on last night just at the dock & it seems to be doing the same thing, so i know the gauage is not bad.
Thanks - totally fustrated |
Fastjeff
Senior Member
Username: fastjeff
Post Number: 6908
Registered: 09-2003
| | Posted on Wednesday, October 07, 2009 - 05:33 pm: |
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One of mine does the same thing, and I could care less. Why? 'Cause all you need it 10 psig per 1,000 rpms--and that's very conservative.
Jeff |
dan brahms
Member
Username: dbrahms
Post Number: 41
Registered: 09-2008
| | Posted on Tuesday, October 13, 2009 - 03:38 pm: |
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I have the same problem. Port motor starts at 60psi and drops a bit after running. Starboard engine starts and stays at 40psi all the time. Why does this happen? |
Fastjeff
Senior Member
Username: fastjeff
Post Number: 6941
Registered: 09-2003
| | Posted on Wednesday, October 14, 2009 - 07:02 am: |
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Sticking pressure relief valve in the oil pump. A tiny bit of dirt is all it takes in the balancing act of pressure vs spring load.
Jeff |
