About my noisy lifter

[Richard J Lebens <rick-l@rocketmail.com>]

A few days ago I asked about my noisy lifter in my 1991 90 20 valve. 
Note I said lifter not lifters, as in a clack, clack, clack at idle. 
Putting a screwdriver to my ear the best I could narrow it down was to
the back of the engine.

Phil Payne said to fill it with oil to the max mark.  I was skeptical
but figured what would it hurt and I should top off the oil anyway.  I
added a little less than a quart and the next time I drove it noise
was gone.

Not to look a gift horse in the mouth or anything, but why did this
work?  I thought the lifters were supplied pressurized oil from the
pump.  What difference could the oil level in the sump make unless it
was way low?






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