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Oil pressure increases

Tiny
CHRISCON13
  • MEMBER
  • 2004 CHEVROLET SILVERADO
Engine Mechanical problem
2004 Chevy Silverado V8 Four Wheel Drive Automatic

My oil pressure slowly increases to maximum as I travel pulling a trailer. The engine is a diesel 6.6
Thursday, April 23rd, 2009 AT 12:06 AM

11 Replies

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the oil pressure with a mechanical gauge if normal replace the oil pressure switch abnormal could mean oil pump and engine bearings
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Thursday, April 23rd, 2009 AT 12:33 AM
Tiny
LCASSA
  • MEMBER
  • 1 POST
  • 1996 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 152,000 MILES
On start up the oil filter seal is blown and oil leaks from filter I noticed recently that my oil pressure reading was higher than normal and I had a tapping in the upper end of the engine for a few minutes until the oil warmed up, I just contributed it to very cold temperature but the other morning on start up it blew the filter. I cleaned up and reinstalled anew filter and it did it again what do you think and how to fix. Also this is a rebuilt motor which has about 5000 miles on it.
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Tuesday, June 6th, 2017 AT 11:22 AM (Merged)
Tiny
DOCFIXIT
  • MECHANIC
  • 18,828 POSTS
Would suspect bypass valve stuck closed in oil pump.
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Tuesday, June 6th, 2017 AT 11:22 AM (Merged)
Tiny
GARY2263
  • MEMBER
  • 1 POST
  • 2000 CHEVROLET SILVERADO
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
Engine problem
2000 Chevy Silverado 6 cyl Two Wheel Drive Automatic 140000 miles

Just in the past few days my Chev has had a cold start tappet noise for 25 - 30 seconeds after starting. Today I noticed the oil pressure is approx 25 - 30 lbs higher than normal. What ya think?
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Tuesday, June 6th, 2017 AT 11:22 AM (Merged)
Tiny
MASTERTECHTIM
  • MECHANIC
  • 4,750 POSTS
I would not panic. I would double check the y pipe flanges. They usually wear and causes an exhaust leak that is usually misconstrued as a lifter noise. If you look at the y pipe flange you will probably see a little black soot. This will verify its an exhaust leak. Check this out before you go after bad lifters.
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Tuesday, June 6th, 2017 AT 11:22 AM (Merged)
Tiny
MACBUSY
  • MEMBER
  • 5 POSTS
  • CHEVROLET SILVERADO
1994 v6 chevy c 1500 oil pressure reads 70 psi while in gear or traveling 60 mph either cold or maximum operating temperature (180 deg.) At idle it reads about 50 psi cold or hot. The oil and filter were changed but, the same pressures appeared before the oil and filter were change. Also, I see no oil where the oil goes in the engine. I am thinking the oil pump is bad.
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Tuesday, June 6th, 2017 AT 11:23 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
The oil pump pressure relief valve is the one that maintains the pressure

I see no oil in the engine

Check your oil level:
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Tuesday, June 6th, 2017 AT 11:23 AM (Merged)
Tiny
MPARSLEY
  • MEMBER
  • 1 POST
  • 2003 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 52,660 MILES
Engine Performance problem
2003 Chevy Silverado V8 Four Wheel Drive Automatic 52660 miles

The guage for the oil pressure in my truck is really high it is past 80psi and seems like it is getting higher.
I was just wondering if this something that I need to get looked at right away and if it is something that will cost alot to get fixed?
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Tuesday, June 6th, 2017 AT 11:23 AM (Merged)
Tiny
MHPAUTOS
  • MECHANIC
  • 31,937 POSTS
HI there, first thing to do is check the oil pressure with a mechanical gauge, and if the pressure is high, report the readings and I will advise on what to do, this just may be a faulty sender, but do the test first.

Mark (mhpautos)
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Tuesday, June 6th, 2017 AT 11:23 AM (Merged)
Tiny
XMIKE66
  • MEMBER
  • 1 POST
  • 2003 CHEVROLET SILVERADO
  • V8
  • 4WD
  • AUTOMATIC
  • 70,000 MILES
Engine Mechanical problem
2003 Chevy Silverado V8 Four Wheel Drive Automatic 70,000 miles

My oil pressure is usally somewhere around 40 psi. But now my oil pressure has jumped to 80 psi.

What are some of the problums I may be facinng with high oil pressure

and is it a Do It Yourself project or would it be Better to have a automotive technichian do it

What would be the average cost
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Tuesday, June 6th, 2017 AT 11:23 AM (Merged)
Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Check the oil pressure with a mechanical gauge if normal replace the oil pressure switch if not could be the oil pump pressure relief valve.
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Tuesday, June 6th, 2017 AT 11:23 AM (Merged)

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