LOw oil pressure when cold - Engine Troubleshooting


	Auto Repair Home	SEARCH POSTS	WHO'S ONLINE	LOG IN

Automotive Repair

Car Troubleshooting Topics
  Car Troubleshooting
  Engine Troubleshooting
  Engine Fault Codes
  Electrical and Wiring
  Transmission Problems

Car Repair Topics
  Car Making Noises
  Car Stereo Repair
  Heating or AC Issues
  Motorcycles and ATVs
  Tricks of the Trade
  Truck Repair Advice

Site Options:
  Login
  Sign up here!

Latest Forum Post

1989 toyota pickup 3.0 crank no start

I have a 1989 toyota pickup 3.0 crank no...

Strut spring orientation and strut mount tension nut

2017 Nissan rogue awd 2.5 L Put in Monro...

Transmission stuck in part, I have tried everything

So I'm working on my elderly fathers 201...

2017 dodge journey LED headlights on/off randomly

Year of vehicle 2017 Make of vehicle dod...

Kia Soul starter replacement issues!

Okay so my car is a 2010 Kia soul 2.0 en...

Please Help - Knock sound & engine fail

Hi all, Hoping to get some insight and ...

multiple warning lights

2013 GMC Terrain 130,000 miles 4 cylinde...

03 alero no low speed blower

Good day everyone, I have a 2003 Olds a...

04 Chevy 2500hd tail light issues

Help!!! I have changed my combo switch...

1999 Grand Caravan Sport not starting.

Hi. I'm new here. I hope someone can hel...

LOw oil pressure when cold

Sign up here!

Search for (search options)

Auto Repair Home>> Automotive Repair>> Engine Troubleshooting

maize21
New User

Nov 4, 2012, 10:21 AM

Post #1 of 3 (1932 views)

LOw oil pressure when cold	Sign In

I have a 2006 GMC 2500 Savannah van with a 4.8 V-8 engine; 385K miles (almost all highway miles). This engine has been very well maintained, uses no oil; and runs and sounds as good as when it was new. For the past couple months; when I first start it, the oil pressure gauge reads 20-25 lbs. Once it warms up it's just fine; 50-60 lbs. NO CLACKING OR OTHER NOISES ARE COMING FROM THE ENGINE. I've changed the oil and filter (Fram) twice already but no difference. Any suggestions as to what could be causing this? Perhaps the sending unit is faulty? This makes no sense to me; I would think that the opposite would be true - high pressure when cold, low when hot. -Maize

Discretesignals
Ultimate Carjunky / Moderator
Discretesignals profile image

Nov 4, 2012, 11:40 AM

Post #2 of 3 (1882 views)

Re: LOw oil pressure when cold	Sign In

That is a lot of miles. Oil pressure seems to be within specifications.

Specification when the engine is hot:

6 psi at 1,000 engine RPM)
18 psi at 2,000 engine RPM
24 psi at 4,000 engine RPM

Could be a gauge or sender problem. You could screw in a oil pressure gauge and confirm your readings.

Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Nov 5, 2012, 5:53 AM

Post #3 of 3 (1844 views)

Re: LOw oil pressure when cold	Sign In

?? By rights should read higher at first start up if correct readings which they may not be. I would check by separate gauge as DS suggested and also switch out oil filter to a Wix or NAPA gold (should be same) filter. I'm not pleased that manufacturers maintain their same specs anymore with any of them. Allied Signal (Fram) TMK as a company has changed hands and Wix may have too

Plenty of miles for assorted reasons. I've never seen actual lower oil pressure cold vs warm even with some really tired high mile engines,

T

Search for (options) Privacy Sitemap