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Originally Posted by Mattman
I wasn't aware that the rockers had to be changed at the same time as changing the compensators, I can understand if the rocker face is worn or ensuring the compensators stay paired with the original rocker but do they need to be replaced when fitting new compensators?
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Well, strictly speaking 'on principle' and from the MB manual, yes. If it were me, no, I'd locate and replace the collapsed compensator(s) and re-use the rocker(s) and associated shim(s), assuming the rockers are in good condition. My MB-trained friend has advised me in the past that the rocker can usually be re-used as well.
I guess it's a judgement call, so I'll not say any more since I'm not a mechanic...my experience is limited to a complete 2 camshaft swap, with all compensators and rockers, from a used 116 engine to another ('76 450SE), a gruelling 32 hour job that involved the whole 9 yards, including measuring the shim clearance with the special tool. Previous to that, I tried to save the old worn camshaft by installing new compensators and/or rockers on just the worn lobes, but it didn't work because the lobes just kept digging into the rocker faces and ruining them.