Burnt Valve
Fleet Owner
Joined: Sep 2005
Posts: 28,609
Likes: 18
From: Lake Tahoe, Nevada
Remove the push rods from the suspect cylinder and blow air into the spark plug hole. Listen for air escaping. If it's leaking through the intake it's an intake valve. If it's leaking through the exhaust it's an exhaust valve. If it leaks into the crankcase it's the piston or rings.
Thread Starter
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4wd Low
Joined: Jan 2006
Posts: 13
Likes: 2
Thanks so much Bdox, I have a 77 F100 with a 300ci and it has only 57,000 on her, I bought it two years ago with only 40,000 on her. I'm the second owner and it was never beat on but it did sit in the original owners yard for 12 years. If a valve did get cooked what would be the cause for one to burn at 57,000 and would a compresion test tell me if one was bad?
Thanks for your help,
Ken.
Thanks for your help,
Ken.
