Re: '55 engine back to life! Mostly worked...

Posted by Bob E. On 2018/8/5 18:43:58

A few more bits from today's troubleshooting:

The frequency of the noise coincides with the light pulse on my timing light. I removed the engine oil dipstick and the mechanical fuel pump and noise was still there (used the electric pump I installed to power car). Also, the noise is not evident when I start the engine cold. It starts to appear after 30 sec - 1 min as the engine warms. Noise seems to fade as rpm is increased from 450rpm @ idle to higher, but returns noticeably as return to idle (I attribute to the engine noise drowning out this other noise). When I put my hand on the deep end of the oil pan, I believe that I can feel something when I hear the noise, but it is a subtle difference.

Going to try to focus my efforts to pinpoint the source of the noise before tearing into the timing chain cover etc.

-Bob