Final round of quarterly refurb related queries. It's been productive, albeit grey inducing.

240D, 1981

ISSUE:


Low end engine thumping noise alleviated by engaging clutch. More of a thud-thud-thud-thud-thud, disappears when I press the pedal. Comes back when I release it. Engine smooth with clutch in.

CLUES:


*Happens in idle, gear box in neutral.

*Clutch in, noise disappears. Clutch out, noise reappears.

*Driving in gear, doesn't seem to be an issue.

*Issue began about a week ago when I replaced my motor mounts (lemforders)

*The engine appears to wobble side to side in a way that it hadn't previously, can see the oil sump wobbling back and from from underneath. Partially alleviated by pressing the clutch.

*Transmission mount replaced 3 months ago

*No T-mount installed (may have had one in the past?)

*Seated the new mounts by shaking the engine a bit, no issues bolting them down again.


Losing my mind.
Please, throw me a bone.

__________________
1981 240D 4sp manual. Ivory White.