95 GMC 5.7 L oil pump buzzing sound.
Asked by Tommyboy78 Jan 24, 2018 at 12:38 AM about the 1995 GMC Yukon SLT 4WD
Question type: Maintenance & Repair
Oil PSI good. No other abnormal valve train
noise. Temp good, no warning lights. Making
more sound than I'am accustomed to. Crate
motor install. Everything is torqued to spec
on motor.
7 Answers
oldcarpenter answered 6 years ago
have you isolated the buzzing sound to the oil pump? what is the oil pressure reading on a psi guage? possibly could be the pump used in the crate motor...I assume from your post, other than the buzzing sound everything else about the motor running, is fine and sounds "normal"...have you driven it at all....does the "buzzing" sound get louder when you bring up the rpm's slowly?
Tommyboy78 answered 6 years ago
At idle, 40 psi. At 2000 rpm between 40 and 80 psi on dash guage. Ran fine when test drove. Put stethoscope to oil pan sump, and buzzing is clear as a bell. Trans not making any noise. Quiets up when rpm is brought up.
oldcarpenter answered 6 years ago
sounds to me that it is indeed in the oil pump. in my opinion, next step would be to change out the oil pump...and i know that's a lousy option...
Tommyboy78 answered 6 years ago
Yup, especially being 4WD. Oldcapenter, thank you for your feedback.
Tommyboy78 answered 6 years ago
I'm going to call the manufacturer of the engine.... Hopefully something good comes of this.
oldcarpenter answered 6 years ago
Your Welcome, and I hope there is some type of good remedy with the manufacturer
Did you ever find the problem. I'm having the same issue new crate engine installed on my 97 k1500.
