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Old 01-15-2018, 07:11 PM   #35
Stage1gs
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Join Date: Nov 2014
Location: Grant, FL
Posts: 37
Default Re: Interpreting Compression Test Results

I spun the engine over with the head off and valves 2 and 6 stuck open. I aimed a flashlight in the intake. / exhaust port of each valve when the valve was in the closed position, and found that a couple tappets had "self adjusted" preventing the valves from completely closing. I am in the process of installing the modern valve kit shown in #34 and have 6 of the 8 valves completed. The seats are cleaning up nicely. I am lapping until I get a .090" wide wear pattern on the seat, one valve took a while but I finally got it.

Question - when installing the one piece guide that looks like the original guide, is there a sealer that should be applied around the guide, or do you put them in dry? Once I cleaned the valve guide bore they pushed in with just a bit of resistance.

I measured the lower skirt of each piston at 90 degrees to the wrist pin. The engine is .125 over and thr bore is 4.00". All 4 pistons came in between 3.996 and 3.998.
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