Om651 - Chain vs Tensioner

[Notamech]

the chain tensioner is easy to replace and costs £45 for an INA brand one which is OE quality
prime the tension in fresh oil before fitting it - A6510500800 this is the part number
fitting takes about 30minutes- just make sure the engine is at TDC otherwise takes some brute force to push it in =)

Thanks mate. Decided not to do it as an oil change seems to have fixed the issue for now. I dont get the rattle anymore even if the car has been sat for long. Will definitely look into it if the noise comes back

 

[Vanbursta]

I've done this twice now, first time not easy as engine was not TDC, second time piece of cake with engine at TDC. Easily doable in an hour and a half.

 

[horgantrevor]

I would just monitor it for now, every now and again on cold start, just listen for any tell tail signs, you WILL hear them if its a problem. chances are there is no issue.

Lots of things can fail, but I wouldnt worry until something does, otherwise you could be pumping money into a car with no problems. I learnt this the hard way over the years.

Pretty tough motors these OM651's Plenty about with >200K miles on them. Enjoy

I have one with 252,000 km still on original tensioner and chain but going to change to updated tensioner