oil pressure?

[Bodyman]

I have 93 Yukon 2dr 5.7 having oil pressure problem after driving for 10 to 15 miles engine warms up oil pressure drops from 28lbs to 10lbs stop at light bottoms out check gauge light comes on parked it just now my tech will pick up tommorow he said thinks its the oil pump just curious what some of u guys opinion would be.

 

[99Yukon_Z71]

This might sound stupid, but do you have the right amount of oil in there? Also, check the sending unit, but to be on the safe side I would replace the oil pump. If it still acts up then its going to be the sending unit behind the manifold, or the gauge itself.

 

[Bodyman]

Yeah checked it first thing i bought it from state college been service regularly runs great expect for this issue that just started.

 

[Biggwaukegan]

yo, heres whats wrong. You gotta worn out oil pump. Gonna have to take off the oil pan and put a new one in. Id go with a HP Meling. Im getting ready to do this on my 97 this weekand along with a new timing gear set and the new optima. Trust me replace the oil pump and you can thank me later

 

[blueflamed03]

if light is coming on, its reading low pressure, so for the mean time, until you can change oil pump, use thinner oil. How many miles on this?

 

[k gee]

Just curious...is the oil guage on our trucks a dummy guage or is it supposed to fluctuate with RPMs?

 

[Bodyman]

oil pressure

Thanks for your input guys my tech pulled oil pan today replaced oil pump also thought we would check rod bearings and and main they were pretty bad so while apart figured be a good time to replace them also Always something i think he was pretty fair $582.00 parts and labor. now its time to start on body and paint thats what i do for a living so atleast the labor's cheap.

 

[blueflamed03]

Just curious...is the oil guage on our trucks a dummy guage or is it supposed to fluctuate with RPMs?

it will fluctuate with temp of oil, and RPM of truck.

 

[99Yukon_Z71]

I hope he had the crank machined!!

 

[blueflamed03]

some good guys can slip new main bearings in from the bottom and never pull crank...

 

[Biggwaukegan]

yea your welcome for the oil pump info. wheres your manners

 

[blueflamed03]

yea your welcome for the oil pump info. wheres your manners

seriously?

if you expect 'thank you's' you might want to find another forum.

Enjoy helping, should be pleasure enough.

 

[Bodyman]

oil pressure

Well got the Yukon back yesterday oil pressure is peggin out to 60lbs on start up and hasn't dropped below 40lbs after warm up and driving no bottom end rattle at start up anymore tech checked with machine shop went with slightly oversized bearing on their reccommendation seems to be doing great think i'll get started on body this weekend thanks again for all the input i really enjoy this forum very informative.

 

[blueflamed03]

cool deal T.C, sounds like your dialed in, have a great weekend.

 

[Sellncars]

some good guys can slip new main bearings in from the bottom and never pull crank...

Ya and they also don't know what the journals on the crankshaft look like on the top. He would have been better off just buying a reman crank and bearing set, timing chain and oil pump with screen.

 

[maniacmurray]

Well I've been drag racing, doing mods on engines since I was 15 and I can honestly tell you that by not pulling the crank out and at least having it checked then you are asking for trouble man! If the crank is scarred in any way it will chew up/burn or spin s bearing quick! Be safe and listen for abnormal noises! Use Castrol GTX 10w30! I have put bearings in like that before too, but only because I needed a motor to hold up for maybe a few quick races til I got the money to put a Crank Kit in it! Not trying to rain on what may seem a good thing to you, but ID be cautious with this deal!!!