Valve Job

Posted by Paul Reasenberg on February 23, 1998 at 18:11:00

On Feb 16 I posted a message about "Engine Mysery" in which I described my engine's symptoms. Initially, the problem appeared to be a timing problem, but the ignition turned out to be fine. Further inspection made it clear that the valves were sticky. I am planning to clean the valves. In the process of inspecting, I discovered that the distributor/oil pump drive shaft was wobbly, and could move laterally about 1/4" at the joint. There is no sleeve securing it in the well at the bottom of the valve chamber, so it flops around in there. I think there's supposed to be a sleeve and spring to keep the drive shaft in place, and to confine the pressurized oil and cause it to flow through the horizontal diverter tube to the front part of the chamber. Is that right? Apparently, whoever put this engine together left out these parts. Instead, oil flows freely up the shaft's well and directly into the center section of the chamber. This may mean that no oil is getting to the front of the chamber, and thus to the front main bearing and valve chamber.

In addition to this strange configuration, there is another non-standard thing. An after-market oil filter was added by the previous owner, taking "pressurized" oil from the hole at the bottom of the block where the brass test plug should be, From the filter, the oil goes through a tube into the top of the timing gear chamber, through a hollow bolt/fitting. I cannot imagine how any oil could make it through the filter, since there's no pressure due to the lack of sleeve sealing the shaft!

My plan is to (a) lose the filter; (b) replace the parts that should be in the valve chamber. Any comments?

Also, can anyone tell me what kind of valve spring compresser tool I need to get for my valve job? And what kind of abrasive compound?

Finally, there are apparently adjustable tappets in this engine. I don't know how to adjust them. Can someone describe the process? Is this a locking nut system? Is 0.012"-0.015" the desired gap?

Thanks for any comments,

Paul


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