Reasons for oil not draining from the first 4 rocker arms.
Feb 2, 2020 at 7:02 PM
Lack of oil from rocker arm
1995 GMC SIERRA
SAVANNAH DALES
- MEMBER
- 1 POST
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JACOBANDNICKOLAS
- ✓ASE Certified Mechanic
- 110,194 POSTS
Hi,
Do you mean there is no oil supply to 4 of the rocker arms or the oil isn't draining from the cylinder head?
If it is lack of supply, something is blocked. If you have oil to all except 4, chances are there is a build up of sludge or corrosion. If the problem is oil isn't draining from the head, then the ports in the head which allow oil to drain back to the oil pan are plugged.
Let me know the specifics.
Joe
Do you mean there is no oil supply to 4 of the rocker arms or the oil isn't draining from the cylinder head?
If it is lack of supply, something is blocked. If you have oil to all except 4, chances are there is a build up of sludge or corrosion. If the problem is oil isn't draining from the head, then the ports in the head which allow oil to drain back to the oil pan are plugged.
Let me know the specifics.
Joe
Feb 2, 2020 at 7:30 PM
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