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Unclepalmer · 02-09-2022, 03:57 PM

This old truck has ALWAYS started. But not now. I have replaced all plugs, points, condenser, starter switch, set timing, etc.... all the usual. Getting spark, gas, ckd wiring connections. Now i am checking the compression and all 4 cylinders are 49-50.
I watched a couple of YouTubes and one guys was 69 and another guy has 39-60 -ave50. 76 apparently is the factory spec. but the other guy said 64... So help me out on what the compression should be. Does this seemingly low compression indicated a leaky head gasket? that should be replaced?
thanks!

02-09-2022, 03:57 PM	#1
Unclepalmer Junior Member Join Date: Feb 2016 Location: Texas Posts: 20	Model AA cyclinder compression This old truck has ALWAYS started. But not now. I have replaced all plugs, points, condenser, starter switch, set timing, etc.... all the usual. Getting spark, gas, ckd wiring connections. Now i am checking the compression and all 4 cylinders are 49-50. I watched a couple of YouTubes and one guys was 69 and another guy has 39-60 -ave50. 76 apparently is the factory spec. but the other guy said 64... So help me out on what the compression should be. Does this seemingly low compression indicated a leaky head gasket? that should be replaced? thanks! Last edited by Unclepalmer; 02-09-2022 at 04:18 PM.