Good morning,
I would suspect the oil cooler which is common. When it fails, then this issue exists.
I would try this before doing anything else.
Roy
REMOVAL
1. Drain engine coolant from radiator drain plug at the bottom of radiator and from water drain plug on cylinder block.
NOTE: Perform this step when removing water hoses.
2. Remove oil filter.
CAUTION: Do not spill engine oil on drive belts.
3. Disconnect water hoses from oil cooler.
When removing oil cooler only, pinching water hoses near oil cooler to prevent engine coolant spilling.
CAUTION:
Perform this step when engine is cold.
Do not spill engine coolant on drive belts.
4. Remove connector bolt, and remove oil cooler.
CAUTION: Do not spill engine oil to rubber parts such as drive belts and engine mounting insulator.
5. Remove water hoses, brackets and water connector, as necessary.
INSPECTION AFTER REMOVAL
Oil Cooler
Check oil cooler for cracks.
Check oil cooler for clogging by blowing through engine coolant inlet. If necessary, replace oil cooler.
Relief Valve
Check relief valve for movement, cracks and breaks by pushing the ball. If replacement is necessary, remove valve by prying it out with a suitable tool. Install the new valve in place by tapping it.
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Wednesday, July 15th, 2020 AT 4:45 AM