Lost oil pressure! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TheSeeker · 01-11-2011, 01:36 PM

I was getting my truck ready last weekend to drive to work on monday and doing some repairs/cleaning. I removed the AC compressor which was bad and changed to a brand new water pump. I removed all the ac brackets as well. The temp gauge is busted and most of the other gauges are off, but now my truck starts and idles nice but has no oil pressure. I changed the oil about 2 weeks ago and checked it its nice and full but theres still no pressure. I can get on the free way and the needle just bounces between 0-20. Do you think somethings wrong or the gauge is bad? Any signs to look for?

dan76 · 01-11-2011, 01:43 PM

For a quick check, install a mechanical gauge. You don't have to make this a permanent install, just attach the fitting to the back of the block where the sender is. Most likely the sender is faulty. What type of engine/year?

rusty baker · 01-11-2011, 02:00 PM

If you drove it on the freeway with no oil pressure, it wouldn't still be running.

cdowns · 01-11-2011, 02:09 PM

Quote:

Originally Posted by dan76

For a quick check, install a mechanical gauge. You don't have to make this a permanent install, just attach the fitting to the back of the block where the sender is. Most likely the sender is faulty. What type of engine/year?

no sending units on these trucks they are mechanical oil gauges from the factory

TheSeeker · 01-11-2011, 02:40 PM

So, I should probably get around to replacing the gauges then. I have driven it since sunday on the freeway everyday between 30 and 50 miles round trip. It still starts and idles nice but the gauge reading freaks me out. Stock 70 350 btw. Thanks for the help. If anyone else has any suggestions let me know

allengator · 01-11-2011, 02:52 PM

If you really had no oil pressure at idle, it wouldnt take long for the top end to start chattering!
And I agree that it wouldnt have lasted on the highway

cdowns · 01-11-2011, 03:14 PM

i'd go to local autoparts and see if they have a cheap mechanical gauge and just disconnect the original and hookup the new one to see if original gauge went bad

TheSeeker · 01-11-2011, 03:33 PM

Ok, I havent heard any knocking or rattling either so Im going to pick up a cheap gauge tonight. See if it fixes the problem

Jacfourteen · 01-11-2011, 04:12 PM

Maybe a line got kinked when you were working on it? I know it's not really near where you were working on, but it's just kinda weird for it to stop working all of a sudden.

01-11-2011, 01:36 PM	#1
TheSeeker Registered User Join Date: Dec 2009 Location: Glendale, AZ Posts: 337	Lost oil pressure! I was getting my truck ready last weekend to drive to work on monday and doing some repairs/cleaning. I removed the AC compressor which was bad and changed to a brand new water pump. I removed all the ac brackets as well. The temp gauge is busted and most of the other gauges are off, but now my truck starts and idles nice but has no oil pressure. I changed the oil about 2 weeks ago and checked it its nice and full but theres still no pressure. I can get on the free way and the needle just bounces between 0-20. Do you think somethings wrong or the gauge is bad? Any signs to look for?

01-11-2011, 01:43 PM	#2
dan76 Registered User Join Date: Mar 2008 Location: Salt Lake City UT Posts: 441	Re: Lost oil pressure! For a quick check, install a mechanical gauge. You don't have to make this a permanent install, just attach the fitting to the back of the block where the sender is. Most likely the sender is faulty. What type of engine/year?

01-11-2011, 02:00 PM	#3
rusty baker '70 C-10 Primer Join Date: Dec 2008 Location: nevada,missouri Posts: 117	Re: Lost oil pressure! If you drove it on the freeway with no oil pressure, it wouldn't still be running. __________________ "The difference between stupidity and genius is that genius has its limits." Albert Einstein

01-11-2011, 02:40 PM	#5
TheSeeker Registered User Join Date: Dec 2009 Location: Glendale, AZ Posts: 337	Re: Lost oil pressure! So, I should probably get around to replacing the gauges then. I have driven it since sunday on the freeway everyday between 30 and 50 miles round trip. It still starts and idles nice but the gauge reading freaks me out. Stock 70 350 btw. Thanks for the help. If anyone else has any suggestions let me know

01-11-2011, 02:52 PM	#6
allengator Registered User Join Date: Dec 2010 Location: Burleson, Texas Posts: 596	Re: Lost oil pressure! If you really had no oil pressure at idle, it wouldnt take long for the top end to start chattering! And I agree that it wouldnt have lasted on the highway __________________ Allengator Outta the Blue (my band - available for hire in the DFW area!) 1980 Chevy SWB Pickup (build thread) 1951 Chevy Sedan Delivery 2004 Chevy Tahoe Z71 2011 Harley Davidson Street Glide 2018 Silverado Z71 Crew Cab

01-11-2011, 03:14 PM	#7
cdowns Senior Member Join Date: Jan 2003 Location: daytonabeach Posts: 22,956	Re: Lost oil pressure! i'd go to local autoparts and see if they have a cheap mechanical gauge and just disconnect the original and hookup the new one to see if original gauge went bad __________________ 71c-10 350/2004r/4:11 lowered3/4 longbed/dead by hurricane MEANING OF DEATH::::: SOMEBODY ELSE GETS YOUR STUFF DONT BELIEVE EVERYTHING YOU THINK TAKE MY ADVISE;I DON'T USE IT ANYWAY

01-11-2011, 03:33 PM	#8
TheSeeker Registered User Join Date: Dec 2009 Location: Glendale, AZ Posts: 337	Re: Lost oil pressure! Ok, I havent heard any knocking or rattling either so Im going to pick up a cheap gauge tonight. See if it fixes the problem

01-11-2011, 04:12 PM	#9
Jacfourteen Big Red - Now its a SWB! Join Date: Jun 2009 Location: Oroville, Ca Posts: 1,624	Re: Lost oil pressure! Maybe a line got kinked when you were working on it? I know it's not really near where you were working on, but it's just kinda weird for it to stop working all of a sudden. __________________ 68 3/4 ton (Project)-350 Small Block, .030 over, 10:1 comp, 3998993 heads, C3BX edelbrock intake, comp cams XE268, Holley 670 SA, long tube headers, dual flow 40's, E-fan, Alum rad, currently under the knife getting shortened and bagged build thread 41 3/4 ton (wife's)-flatbed, fully restored to original 01 Tahoe LT 4WD (my daily driver)-Magnaflow Muffler, Rollin on 22's 02 Ford Mustang Convertable (Wife's Car)-Flowmaster 50, Clear corners, Intake, sittin on 18's



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