Posted by used red MN on April 01, 2022 at 13:02:31 from (75.73.112.20):
In Reply to: Ford naa posted by Ac145 on March 31, 2022 at 15:40:23:
In your previous post on this you said it showed 120psi for compression on two of the cylinders. In my opinion it should have ran or at least fired on those two cylinders. I wonder since the lash was that tight if a variation in the cam lobe base circle was enough to open a valve slightly at top dead center and then released the compression before it was able to fire. I am surprised that it did not do a lot of backfiring out of both the intake and exhaust. It must have been pumping some air to blow the mouse nest out of the exhaust and you also said it had suction with your hand on the carb inlet. If I was in your shoes I would need to throw a dial indicator on the intake and exhaust valve push rods and turn it by hand up past TDC compression and see if there is movement from the cam base circle that could have been releasing the compression. Will be interesting to see if it runs after the valve set.
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