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Old 07-06-2025, 06:20 AM   #10
JFP in PA
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Join Date: Feb 2005
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Quote:
Originally Posted by heiwaz View Post
If after replace the relief valve continue the noise, next step wiil check the oil pressure in the head and after oil pump. The oil suction cup in the crankcase was checked and is ok.

In the case after replace relief valve and the oil pressure would be low, what could be the problem? chain tensioners loosing oil? oil pump gears with excesive wear?


I have to mention that this hydraulic lifter noise started after the engine was repaired of water-oil mixed through one of the brass plugs in the cylinder head that was corroded.
I would two things: 1. Replace the pressure sender with a mechanical gauge and test the system again. If the problem persists, 2. I would next be looking at the oil pump itself for excessive wear or pitting on the gears.
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