Timing Chain Tensioner Leak at 208k
 

Timing Chain Tensioner leaks on my E300. Never seen this or have experience. It is the highest point of the leak, not the valve cover.

Is there an o-ring, or do I have to replace the whole tensioner? Advice. Thank you.

Jake

Did you mean to post a picture ?
And exactly what engine do you have ?

If it's anything like the 603, there's just an aluminum sealing ring in there. Try tightening the tensioner.

it's an om606. no picture there isn't quite a point. it's cut and dry.

I'd love to know if it's as simple as tightening the tensioner.

Looking up pictures of the 606 tensioner, it's VERY similiar, if not identical to the 603, complete with the aluminum sealing ring. Try tightening the big bolt head (tensioner body) and see if the leak stops. If not, you'll want to replace the crush washer.

That particular seal is very easy to mess up. Tightening is worth a try, but you'll probably end up R&R the tensioner to install a new seal.

Thanks guy should I just replace the tensioner all together? if I remove it?

May as well, cheap enough, and good insurance for keeping the chain tight.
Recently I held an om606.910 tensioner and in comparison with a 602/3 unit, they are similar but have a different depth.
I'd imagine the crush washer would interchange but not the tensioner itself

The cylinder head is aluminum. I'd be wary of simply "tightening it some more". If you strip out those threads, you'll be in a world of trouble.

I vote for replacing the seal ring only, and torquing the tensioner to spec. I can look up the spec if you need it.

If you have the spec that'd be great. I'm gonna locate the seal ring part number as well.

I'm also not a huge fan of trying to tighten a tensioner in an aluminum head. Sounds risky...

Cam Tensioner
 

Can the tensioner be cleaned and reused with new washer or straight out replace with OEM ?
Cheers from Australia
Peter

If you tighten or re-tighten it with a torque wrench to the proper torque there should be no issues.