Quote:
Originally Posted by JFP in PA
Possible, but they don't tend to die that way, they just stop working completely. He could always substitute a mechanical gauge to find out if it is real or not.
The pressure relief valve on the pump can fail and blow open a soon as the pressure begins to build, suddenly dumping all the pressure.
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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.
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