skoryaro2
12-07-2004, 08:42 AM
A couple of days ago someone posted a reply to a thread (and I'll be darned if I can find it again!) that said that at 62psi of oil pressure and above oil begins to by-pass the OEM oil filter, thus resulting in unfiltered oil being recirculated. Is this correct?
Why do I ask........? Ever since reading it I've been watching my oil pressure gauge. During air temps below about 40*F my truck will stay well above 60psi (sometimes nearing 90psi) for 15 minutes or so of driving at higher RPM's until warm. Thinking I might start using the block heater more often.
Melvin Hatcher
12-07-2004, 09:07 AM
A couple of days ago someone posted a reply to a thread (and I'll be darned if I can find it again!) that said that at 62psi of oil pressure and above oil begins to by-pass the OEM oil filter, thus resulting in unfiltered oil being recirculated. Is this correct?
Why do I ask........? Ever since reading it I've been watching my oil pressure gauge. During air temps below about 40*F my truck will stay well above 60psi (sometimes nearing 90psi) for 15 minutes or so of driving at higher RPM's until warm. Thinking I might start using the block heater more often.Try this web site.
http://www.machinerylubrication.com/article_detail.asp?articleid=398&relatedbookgroup=ContaminationControl
skoryaro2
12-07-2004, 10:28 AM
Try this web site.
http://www.machinerylubrication.com/article_detail.asp?articleid=398&relatedbookgroup=ContaminationControl
Very Interesting!!
Melvin Hatcher
12-07-2004, 11:10 AM
Very Interesting!!To back up this theory, I rebuilt my Grand National engine. I done the entire reccomended increased oiling tricks to the engine and oil pump modifications. I also used the highest-pressure relief spring (avised against by my machinest) on the oil pump, when it was rebuilt.
After a year of match racing and going to the track. I pulled the pan to check the bearing.
Well, low and behold! The bearing were worn down past the babbit to the brass, along with a lot scratches in all of the bearing.
The modification of the oil pump resulted a sixty lb. oil pressure at idle and eighty lbs. @ two thousand rpms or more.
I now believe in high volume but, not necessary high pressure