Quote:
Originally posted by Ron Roberts
Here is the new findings: The knocking occurs between 32and 40 MPH in 3rd or around 20-25 in 2nd and around 45-55 in 4th, AND I here it on decelleration as well as accelleration. Now I question if this is really knocking, or some other problem. Valves? main bearings? What else would make this sound.
Thanks
Ron
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Hi Ron, I had an old 1600 dp engine once that made knocking sounds on both accelleration as decelleration. It proved to be the main bearings: they were very worn. I didn't have an oil pressure gauge at the time, but I suppose oil pressure should be noticebly lower when the bearings are very far gone...
If your tuning of the carbs and ignition doesn't work out, you indeed might have to consider the bearings. (A) bad rod bearing(s) could also be the cause of course. How 'old' is your engine? Oil pressure readings?
Good luck,
Walter