E350 timing chain tensioner woes

[jmsgld]

2010 W212 E350

Previous owner replaced timing chain tensioner and cross threaded it and buggered the thread, (cheeky bugger covered it in silicone so it didn't start noticeably leaking until a couple of thousand miles after I bought it).

Local merc specialist have tried re-tapping and using Merc spec liquid gasket type stuff, new washers etc, still leaks.

Anyone any ideas how to bodge this more effectively? It's OM642.850 which command ridiculous prices from a scrappy... It runs fine and only leaves a few drops every time it is parked but I can't be leaving oil everywhere I go in it.

Thanks

[harrycovert]

Can you put a Helicoil in?

[jmsgld]

Would have to pull the engine to access, and I think there is an oil channel pretty close to the hole so not sure if enough room to drill out...

[mwstewart]

Clean with brake cleaner, blow dry, and seal with JB Weld. If that won't do it, nothing will, but it will make removal extremely difficult.

[john493]

Loctite also do some excellent stud lock & seal products - Loctite 577, it won't leak and can be removed if needed.


https://www.ebay.co.uk/itm/116273442770?_skw=locti...

Edited by john493 on Friday 14th March 20:05