Quote:
Originally Posted by ctnewman
Is it just cam on valve? I'm still in the stoneage over here spending most of my time working on old harleys.
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No, not cam on valve. "Solid lifters", adjustable or not, on cars are long gone. All modern cars have a hydraulic device to take up any valve gap.
They have a one way valve to pressurize a piston with engine oil pressure. The factory repair manual has a good illustration of the device on page 4244.
If the one way valve leaks a bit, they will bleed down, causing a chattering noise until the oil pressure recharges them.
