Hi All,
Steve, I made the shims you drew to raise the motor mount and compensate for what looked like a compressed top rubber buffer. I cut an access panel into the wheel well (that can be reinstalled with 5 screws after) but have not yet been able to install the shims due to very tight bolts combined with restrictive access.
I initially thought the noise was coming from an exhaust down pipe hitting the frame but now I am wondering. before trying to loosen the left motor mount, I jammed a few aluminum shims between the down pipe and frame to better secure any movement. However, again at idle, the banging was easily heard and no movement was observed by the downpipe.
Leaving the downpipe shims in place, and taking a short drive, I purposefully drove on rough road and NO banging sound could be heard. Arriving at home, I idled the Healey for a short period and the banging could again be easily heard.
Now I am more perplexed. The sound can be heard when at a rough (low rpm) idle but not at higher engine idle speeds and not when driving on rough roads. The sound doesn't appear to be coming from within the engine but no loose components have yet been found around the engine compartment.
The shims are not yet installed at the base of the engine mount due the difficulties mentioned above and I am beginning to think this is going to be my winter project and will require the removal of carbs, intake and exhaust manifolds and downpipes will be required.
Any thoughts would be appreciated,
Ray(64BJ8P1)
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