2001 5.3 oil sending unit leak

[Kendra]

I have a 2001 Chevy Z71 with a 5.3. I noticed a pretty bad oil leak, oil sending unit is leaking, and gauge is stuck on 80 psi.

 My question is, what causes the sensor to start leaking?

[mjm-1957]

Engine heat and old age.

[dna9656]

You'll want to replace that unit immediately, you're engine will seize and be ruined should it run out of oil. The job requires a special socket available at A/P stores, a 3/8" ratchet, 1 or 2 universal joints and maybe 2 extensions (a 2" to 3" 3/8" extension and a 6" X 3/8" extension) a light of some kind, possibly an inspection mirror as the unit is very hard to see. Tighten the new unit,  but do not over tighten. The hardest part of the job is getting the plug back on. Try to tighten the unit so it's in the same clock position it was in when you started to remove it. This step is not essential, just helpful.

 

Edited September 13, 2023 by dna9656