Fireguyfire
Active Member
So when I bought my 70 300 convertible last fall, the previous owner mentioned there was a tick sound on the top of the engine which had just arrived. When I drove the car a couple of times and moved it into my shop for the winter I could tell it was a top end “tic” but didn’t sound deep, and could even be the water pump or alternator.
This winter I pulled the engine, took it apart and found it had been recently rebuilt and bored 30 over, and everything looked excellent inside. I installed a new engine gasket set, replaced some fuel lines etc and then freshly repainted the engine and dropped it back into the freshly restored engine bay.
Anyways, I’ve recently recorded the engine and am about to get to tuning the 440, and the sound is still there, which I could best describe as a fairly loud “tic” on the top end. By ear I was thinking it sounded like the alternator, but using my engine stethoscope it actually sounds like it might be the top front of the intake, just to the right of the distributor.
My plan is to remove the belts for the alternator and PS pump and quickly fire the engine which would eliminate the PS pump, water pump and alternator. If I still have the tic with the belts off, that will tell me it is the engine itself.
Does anyone have any guesses on what this tic might be if it’s not an ancillary item?
It seems very localized to the top enter front of the intake in a small area.
Any suggestions or tips for further diagnosing the sound would be appreciated!
I don’t want to get too deep into setting up the timing and the carb until I figure this one out first.
This winter I pulled the engine, took it apart and found it had been recently rebuilt and bored 30 over, and everything looked excellent inside. I installed a new engine gasket set, replaced some fuel lines etc and then freshly repainted the engine and dropped it back into the freshly restored engine bay.
Anyways, I’ve recently recorded the engine and am about to get to tuning the 440, and the sound is still there, which I could best describe as a fairly loud “tic” on the top end. By ear I was thinking it sounded like the alternator, but using my engine stethoscope it actually sounds like it might be the top front of the intake, just to the right of the distributor.
My plan is to remove the belts for the alternator and PS pump and quickly fire the engine which would eliminate the PS pump, water pump and alternator. If I still have the tic with the belts off, that will tell me it is the engine itself.
Does anyone have any guesses on what this tic might be if it’s not an ancillary item?
It seems very localized to the top enter front of the intake in a small area.
Any suggestions or tips for further diagnosing the sound would be appreciated!
I don’t want to get too deep into setting up the timing and the carb until I figure this one out first.