22r Burnt Valve/Head Replacement
#1
22r Burnt Valve/Head Replacement
It does not bring me joy to be in this position, but my beloved 86' pickup has taken a turn for the worse. After the #3 cylinder not firing, and a compression test of 0, I am coming to the hypothesis of a burnt valve? Being that there was 0 pressure I feel like that rules out a busted piston ring. My question is what other steps should I go through to confirm that my thoughts are correct. If so I was planning on buying a new head from engnbldr with valves and all. Any opinions appreciated!
#3
I had a trickle down test done, and i had a problem about a year ago with the coolant system overpressurizing after long drives and overflowing my reserve, this was after a compression test that showed #3 a little low, but a new radiator cap seemed to fix that problem. If i do the new head im going to replace every damn gasket i can get my hands on, and i assume with new head, valves, gaskets....that should fix whatever issues im having. Engnbldr is conveniently closed for the next week and a half so i guess ill just tear it apart anyways in the mean time. Fuun fun
#5
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Something I take into consideration on a top end rebuild is just how many miles is on the motor. If less then 200k miles a top end usually will work. 300k miles I might consider the bottom end. Just wanted to throw that out there.
#6
Hey just wanted to give a quick update. After taking the head off I found a chip out of the #3 valve as suspected. The cylinders and lower half all look to be in good shape, no glazing, and full o ring marks on the top stroke. Picked up a new top and + gaskets from engnbldr for under 400 bucks! thanks for the advice everyone, now for the re-build!
Last edited by tgmack; 01-25-2016 at 12:32 PM.
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