Loss of oil pressure ?????????
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09-20-2006, 06:08 PM
#22
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Re: Loss of oil pressure ?????????
Do you have a windage tray in the pan? The crank turning at higher rpm can be whipping up and possibly aerating the oil and causing the pump to cavitate(?) Just a thought....
09-20-2006, 06:59 PM
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Re: Loss of oil pressure ?????????
Originally Posted by articfriends
Another question-did your motor always do this since built or is it something that started happening afte x number of hours of run time. You mention 15 hours of run time,were you able to hold it at wot BEFORE 15 hours and it held 60 psi? Did you change the oil pump when you had it back apart to check the bearings. Re-reading everything I would think if everything was fine at one time and you verified all the clearences are still the same and nothing was damaged that your oil pump bypass is now opening or more oil is going thru your lifters or something. Was there any other changed along the way or is your oil running hotter? Did you give it more timing at one point?Smitty
09-20-2006, 07:02 PM
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Re: Loss of oil pressure ?????????
Originally Posted by 4mulafastech
Do you have a windage tray in the pan? The crank turning at higher rpm can be whipping up and possibly aerating the oil and causing the pump to cavitate(?) Just a thought....
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09-20-2006, 08:23 PM
#26
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Re: Loss of oil pressure ?????????
3/8" I believe that is what Stefs called for in my situation..
Had a friend on OSO.. have water plug up his oil filters.. They were AC delco's I believe. Moisture in the oil plugged them up in short order.. ??
Did you try a mech gauge before you tore it down?? I had a problem this past weekend.. and the gauge was reading low and I think I got gas in the oil.. On my last pass, oil warmed up and psi dropped. At an idle it was low also, and you say it comes back when you slow down..
Is the screen in the pan orientated so the oil will be stripped off the crank, or could it be in backwards?? Or was this pan run before without troubles..
Just thinking outloud...
Not sure I am any help.. keep looking.
Dick
Had a friend on OSO.. have water plug up his oil filters.. They were AC delco's I believe. Moisture in the oil plugged them up in short order.. ??
Did you try a mech gauge before you tore it down?? I had a problem this past weekend.. and the gauge was reading low and I think I got gas in the oil.. On my last pass, oil warmed up and psi dropped. At an idle it was low also, and you say it comes back when you slow down..
Is the screen in the pan orientated so the oil will be stripped off the crank, or could it be in backwards?? Or was this pan run before without troubles..
Just thinking outloud...
Not sure I am any help.. keep looking.
Dick
09-20-2006, 10:50 PM
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Re: Loss of oil pressure ?????????
Originally Posted by johnnyboatman
sender will do that, check the engine ground wire, all else fails ck with a mech gauge
09-20-2006, 10:52 PM
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Re: Loss of oil pressure ?????????
Originally Posted by Mr Gadgets
3/8" I believe that is what Stefs called for in my situation..
Had a friend on OSO.. have water plug up his oil filters.. They were AC delco's I believe. Moisture in the oil plugged them up in short order.. ??
Did you try a mech gauge before you tore it down?? I had a problem this past weekend.. and the gauge was reading low and I think I got gas in the oil.. On my last pass, oil warmed up and psi dropped. At an idle it was low also, and you say it comes back when you slow down..
Is the screen in the pan orientated so the oil will be stripped off the crank, or could it be in backwards?? Or was this pan run before without troubles..
Just thinking outloud...
Not sure I am any help.. keep looking.
Dick
Had a friend on OSO.. have water plug up his oil filters.. They were AC delco's I believe. Moisture in the oil plugged them up in short order.. ??
Did you try a mech gauge before you tore it down?? I had a problem this past weekend.. and the gauge was reading low and I think I got gas in the oil.. On my last pass, oil warmed up and psi dropped. At an idle it was low also, and you say it comes back when you slow down..
Is the screen in the pan orientated so the oil will be stripped off the crank, or could it be in backwards?? Or was this pan run before without troubles..
Just thinking outloud...
Not sure I am any help.. keep looking.
Dick
09-21-2006, 07:20 AM
#29
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Re: Loss of oil pressure ?????????
Ok.. something changed... what kind of hoses are you using.. I have heard of the SS wire braid hoses colapsing under certain conditions. Any chance a hose is pinching or closing or the rubber inner hose is swelling?? Actually it was a braided hose that one end would act like a valve. I guess the rubber would somehow close off the flow. Again thinking outloud..
Dick
Dick
09-21-2006, 01:42 PM
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Re: Loss of oil pressure ?????????
Originally Posted by Mr Gadgets
Ok.. something changed... what kind of hoses are you using.. I have heard of the SS wire braid hoses colapsing under certain conditions. Any chance a hose is pinching or closing or the rubber inner hose is swelling?? Actually it was a braided hose that one end would act like a valve. I guess the rubber would somehow close off the flow. Again thinking outloud..
Dick
Dick
Thanks
