YukonOwner06
TYF Newbie
- Joined
- Sep 13, 2022
- Posts
- 14
- Reaction score
- 10
Hi forum members. I have an issue with my 5.3 Yukon engine that perhaps I can get some assistance with. I am the original owner and the vehicle has 137K miles on it. On a dreaded road trip the "Engine Overheating" message popped on the display. The coolant reservoir was empty so once the engine cooled down I refilled it and noticed over the course of a few months the coolant in the reservoir needed to be refilled.
I took the Yukon to a reputable engine shop. They discovered a small hairline crack on the right head. They replaced both heads and less than a few days I noticed the oil pressure dropped from 40 PSI to 20 PSI which eventually dropped below 10 PSI. Fearing there was an issue with the oil pickup, I had the O ring on the oil pick up replaced. It did not improve the oil pressure.
I am still trying to diagnose this pressure issue, but would the installation of new heads (perhaps not the exact replacement heads for my vehicle) cause the oil pressure to significantly drop?
I took the Yukon to a reputable engine shop. They discovered a small hairline crack on the right head. They replaced both heads and less than a few days I noticed the oil pressure dropped from 40 PSI to 20 PSI which eventually dropped below 10 PSI. Fearing there was an issue with the oil pickup, I had the O ring on the oil pick up replaced. It did not improve the oil pressure.
I am still trying to diagnose this pressure issue, but would the installation of new heads (perhaps not the exact replacement heads for my vehicle) cause the oil pressure to significantly drop?