RPM vs oil PSI stats

[winks]

I installed a mechanical psi gauge in my truck this weekend, and have recorded some of my results. I know they're low and I want to know what type of shape I'm in. I plan on using the truck for some trail riding and I don't want to be stuck out on the trails... I also don't want to have to get a new motor either.

idling in drive 700 rpm +/-6 psi

idling in park 800 rpm +/-7 psi

running 1k rpm +/-10 psi

running 1.5k rpm +/-13 psi

running 2k rpm +/-25 psi

running 2.5k rpm +/-30 psi

I know its a hard to get to the oil pump and it involves a bit of work, but I am probably going to try and change it out. I would also like to clean out the oil returns as they are probably clogged, but I don't know how much work it is to get to them. What I'd like to know before I get to working on this, is should I do it, how hard is it to get to the oil returns and clean them? And is my engine doomed, or with some cleaning will it get back to holding the correct PSI that I need?

 

[Seabronc]

You may be able to improve them by going up a notch or two in viscosity like 10W40 or 20W50. The numbers indicate wear in the engine and it could be the mains, clogged pickup, pump, etc. I have been running 20W50 for over a year now in order to avoid pulling the engine until I get around to my next round of restoration.

Good luck,

>-

 

[winks]

You may be able to improve them by going up a notch or two in viscosity like 10W40 or 20W50. The numbers indicate wear in the engine and it could be the mains, clogged pickup, pump, etc. I have been running 20W50 for over a year now in order to avoid pulling the engine until I get around to my next round of restoration.

Good luck,

>-

Thanks, I'll try upping my oil viscosity. How much has it improved your numbers?

 

[Seabronc]

I get 50 - 60 lbs at start, running hot above 1000 RPM around 25 - 30 lbs and idle about 15 lbs. However on real hot days, say in the 95+ range the pressure at idle drops to an indicates 5 lbs or less. I don't worry about it being low as there is no associated lifter or rod noise.

>-

 

[winks]

Thanks again, now my numbers don't seem so bad. I'll be changing out the oil soon.