View Full Version : Tapping in a 351 HO GT40

09-18-2007, 05:01 PM
"I have a tapping in my engine (351 HO GT40). I have a 1997 Correct Craft. I have been told not to worry about it because my oil pressure is cool, my temp is cool, I haven't lost any power, and it doesn't smoke. I have been told the valves can't be individually adjusted because they are in a rack which is adjust via schims. I am not a engine guy so any help or info would help"

09-18-2007, 08:41 PM
is it a tap or knocking?

09-19-2007, 07:37 AM
It is a tap. When you give it throttle the tap either goes away or you can't hear it. The boat is a 1997 with only 111 hrs on it when I got it. The boat has never been run that much. I was told to change the oil and that might take the tap out but it did not.

09-20-2007, 03:57 PM
sounds like a sticking lifter
i have the manual if you want

10-12-2007, 07:25 AM
Anything you suggest besides breaking into the engine?

10-12-2007, 05:49 PM
change the oil

10-12-2007, 08:44 PM
I changed less than a month ago