SPONSORED LINKS

1979 Dodge Truck oil pressure

Tiny
DANIEL49
  • MEMBER
  • 1979 DODGE TRUCK
  • V8
  • 2WD
  • AUTOMATIC
  • 451,000 MILES
Don't let the mileage scare you. Truck is on it's third engine. Currently use Castrol 20W-50 and change oil and filter regularly. Oil pressure gauge reads 50+ when 1st crank. Drive to work on highway and gauge reads 75. Longer I drive the lower the pressure gets, however it never drops below 25 except at stops then it is around 5-10 (maybe lower). I have replaced sender (electric) and even connected mechanical aftermarket gauge which gives me about the same readings. Pressure seems OK till engine gets to operating temperture, then as long as RPM's remain higher then idle everything is OK. My concern is the low pressure at idle which could be below 5 lbs. I am thinking oil pump.
SPONSORED LINKS
Saturday, November 29th, 2008 AT 12:40 PM

1 Reply

Tiny
RASMATAZ
  • MECHANIC
  • 75,992 POSTS
Between 5-10psi at idle and at 2K rpm with 40psi plus is good enough for me. Oil pump pressure relief valve could be sticking-engine bearing problems you'll see and entirely different readings and followed by an engine knock
SPONSORED LINKS
Was this
answer
helpful?
Yes
No
Saturday, November 29th, 2008 AT 12:48 PM

Please login or register to post a reply.

Related Oil Filter Replace/Remove Content

VIEW MORE

Sponsored links