Quote:
Originally Posted by JHZR2
Thanks. The damage on the old one was from the shock rubber bushing coming off. Could something have twisted? Yeah I guess so (?). I thought it had just vibrated in place. This engine does allow a decent amount of tensioner up and down movement.
I can’t imagine something is seizing up occasionally to cause funny forces. But something is obviously moving in a strange direction.
I could have sworn that one of my 603 cars, maybe my 1993 300SD had a washer between the shock and the head, which is why I asked. If that shock is misaligned, it would pull and cause all sorts of funny issues.
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It may need a washer to be perfect, you can always try and see. My 86 and 87s did not come with them, but who knows if the exterior dimensions in the head redesigns in later years, had any impact. I'm not sure how much impact a1mm washer either way wou,d have on the proper function of the tensioner, there's already a bit of play in the bushings. Should be fine.
Either way once assembled and running you can visualize any belt runout and or pulley wobble if any thru the rpm range. If no probs, chalk it up to another case of der gremlins seeking tribute.
