and the saga continues... (low/no oil presure...) - Page 3 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


General GM Chat When starting new posts, please specify YEAR, MAKE, MODEL, ENGINE type, and whatever modifications you have made. Chat about all things GM (and related cars). Off-topic stuff should be in the Lounge, and all Model specific mechanical problems should be posted in the proper forum.

Reply
 
 
 
Thread Tools Search this Thread
Old 02-13-2008, 07:00 AM   #21
Senior Member
Posts like a Corvette
 
Join Date: Feb 2007
Location: Sanford Michigan
Posts: 1,200
Thanks: 0
Thanked 0 Times in 0 Posts
crash93ssei is on a distinguished road
Default

I agree with haro. I usually see about 40 in my '93 at idle
crash93ssei is offline   Reply With Quote
Old 02-13-2008, 07:33 AM   #22
Darrel
Guest
 
Posts: n/a
Default

well thats the thing, on the actual gauge before things went nuts i would see about 30 to 40 as well... grr.... i don't know what to think about this anymore. i have NO money to be chasing problems like the around.
  Reply With Quote
Old 02-13-2008, 10:44 AM   #23
Senior Member
True Car Nut
 
Join Date: Mar 2004
Location: Ames, Iowa
Posts: 3,066
Thanks: 0
Thanked 1 Time in 1 Post
bill buttermore is on a distinguished road
Default

Remember that oil viscosity (thickness) affects oil pressure. Oil viscosity is affected greatly by temperature.

If you have a leaking injector, gasoline will dilute the oil and that will also lower the viscosity and therefore the pressure.

Running heavier oils will increase the oil pressure. If you are currently running 5W-30, change to 15W-40 and see what I mean.

Assuming your cooling system is in good shape, running a 180 drilled thermostat will keep the engine and the oil cooler and the pressure higher. The engine temperature dropped and oil pressure increased in my '95 when I installed a transmission cooler. That'* because the engine coolant no longer had as much transmission heat to absorb with a separate cooler for the trans installed.

Don't get too excited until you have tried a few things and installed a mechanical gauge to see what pressure you really have.
bill buttermore is offline   Reply With Quote
Old 02-13-2008, 11:05 AM   #24
Darrel
Guest
 
Posts: n/a
Default

won't dilluted oil have a lower pressure all the time? according to the mechanic i'm getting about 50psi while driving. i thought that was normal. its just the idle thats in the basement.
  Reply With Quote
Old 02-13-2008, 08:38 PM   #25
Senior Member
True Car Nut
 
Join Date: Mar 2004
Location: Ames, Iowa
Posts: 3,066
Thanks: 0
Thanked 1 Time in 1 Post
bill buttermore is on a distinguished road
Default

Quote:
Originally Posted by Darrel
won't dilluted oil have a lower pressure all the time? according to the mechanic i'm getting about 50psi while driving. i thought that was normal. its just the idle thats in the basement.
Diluted oil will lower the pressure across the range. But, even with diluted oil, the pressure will increase with engine (oil pump) speed.
bill buttermore is offline   Reply With Quote
Old 02-13-2008, 11:15 PM   #26
Senior Member
Posts like a 4 Banger
 
Join Date: Feb 2008
Location: St.Louis area
Posts: 101
Thanks: 0
Thanked 0 Times in 0 Posts
Mr.Firemouth is on a distinguished road
Default

I had around 30psi on my gauge when I got the car, but did an oil change 1,000 miles early and used a Motor Flush kit for the engine oil. The oil came out pretty black! But after the oil change the gauge stays at or above 40.

Many people don't like oil cleaners that remove sludge because small oil holes can be clogged by sludge.(so, I have been told) I on the other hand motor flush every 3-4 oil changes. My Ford Explorer is still running at 280,000 miles and my 390 didn't have varnish/sludge anywhere when we opened it up to do some head work. I'm kinda big about cleaning solvents like motor flush and fuel injection cleaners. Tranny fluid works well too.(but that'* another story)

If your cool with it you could do a "motor flush" on the engine oil and see if it helps any.
Mr.Firemouth is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
And the saga continues..detailed wheels and wheel wells SSEimatt93 Your Ride: GM Pictures & Videos 25 05-07-2006 10:28 PM
The Saga Continues beckstyle General GM Chat 9 01-20-2005 06:29 PM
My idle saga continues... Damemorder 1992-1999 4 10-16-2004 01:02 AM
Car won't start, stall, die saga continues rnbraud 1992-1999 35 08-17-2004 12:35 AM
Low Oil Presure websitedude 1992-1999 1 12-09-2002 06:00 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:25 PM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.