iamkimosabi

Does anyone know where I can find this? I tried ebay with no luck, and the online websites that do carry them want 160+. Just trying to find an alternative. What did you guys use to install your check valves?
Part Number:



This is what the tool looks like...

w276589003300

JohnnyC

you can easily fab one at your local Home Depot

iamkimosabi

iamkimosabi

iamkimosabi

xsever

What was the problem? Tell us more about what you were doing.

JohnnyC

when the engine was first introduced, there was a (non-critical) flaw regarding engine start up sounds. Adding that check valve as well as replacing the chain tensioners was a remedy.

iamkimosabi

The notorious cold start rattle, so I ended up swapping out the chain tensioner for the new part number that was recommended in the TSB for the m276. My engine number fell under the numbers affected. I also add in check in valves into the head, behind the chain tensioner is a hole. I pushed it in by hand till I couldnt anymore, then used an old chain tensioner housing with a flat metal bracket behind it to push the check valve in. Its in, almost exactly flush...a little part sticks out and I didn't want to push it and risk stripping the bolts or damaging the head.

tripper80

Appreciate your sharing this post. It really helps when there's no resources regarding this 276 engine issue.

can you please share the part number of the tensioner and check valve? where do you buy it? how many of them needed?

Plus, how did you manage to press it in?

thanks again.

bmwowner

how did you remove the check valve?
Half of mine got stuck in there

Just204

You can buy it on Amazon.

CaliBenzDriver

Ouch!
These valves are mostly made to go in but not out. MB used two designs:
1- The one with threads behind shoulder flange is good to gently pull

2- The valve with deep shoulder and outer threads: don't mess with it! It's guaranteed to split up nightmare.


Now you are left drilling and cleaning shavings... a road less traveled. Take all the time you need to clean up mint like new.

While at it, polish the tensioner mating surface smooth to hold oil pressure well. This will give you a well timed engine without any camshaft jerkings.

CaliBenzDriver

I have two spare perfectly new check valves with no use. I was stopped by the factory parts not being the cooperative type.


thread near shoulder are removable

In 2013 the factory installed the "Do not disturb" check-valves parts... so I chickened out with no valve replacement.

No problem there! The issues are with the limp tensioner shaft seal and the engine oil pump low output control.


polished aluminum tensioner surface

My new in a box MERCEDES BENZ tensioner parts came from factory with a lip defect on the mating surface - I had to polish one smooth so both tensioners got sanded smooth. Note: for some reason, there is no sealant used to install tensioner.
Surfaces better be nice and true.


air bleed vent hole

Air present inside the tensioner can acts as an air cushion - We don't want that to keep chain tight!!
A tiny hole is provided to help flush air out at the expense of a minor internal leak.