OM642 Turbo Actuator failed w251

bh13coupe

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Hi Guys

I have a stuttering OM642 under load, fault code (P2510-001, Y77/1 turbo actuator positioner signal fault) is pointing to the actuator failing on the turbo. My question is, can you purchase/replace the actuators or are we looking at a new turbo?

If anyone has been down this route, any pointers would be appreciated

thanks

Paul
 

E270 Owner

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Yes you can get them separately,
but if the turbo is causing the positioner to stick due to carbon deposits it will cause the same fault,
in worst cases the worm gear gets stripped on the positioner.

I would advise taking the turbo off and cleaning off the vnt vanes and assembly,
but to test first on the car, take the actuator arm clip off and see if the rod moves the vanes freely around 10mm without snagging.
 
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grober

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Hi Guys

I have a stuttering OM642 under load, fault code (P2510-001, Y77/1 turbo actuator positioner signal fault) is pointing to the actuator failing on the turbo. My question is, can you purchase/replace the actuators or are we looking at a new turbo?

If anyone has been down this route, any pointers would be appreciated

thanks

Paul

https://en.wikipedia.org/wiki/Mercedes-Benz_OM642
Mercedes don't list the actuator as a spare part- just the entire turbocharger- which is only available as a reconditioned unit -- incidentally they list 5 possible replacements according to chassis no. They are also used in commercial vehicles so a good commercial diesel engine rebuilder might be a useful avenue to explore?
 
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bh13coupe

bh13coupe

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https://en.wikipedia.org/wiki/Mercedes-Benz_OM642
Mercedes don't list the actuator as a spare part- just the entire turbocharger- which is only available as a reconditioned unit -- incidentally they list 5 possible replacements according to chassis no. They are also used in commercial vehicles so a good commercial diesel engine rebuilder might be a useful avenue to explore?
Thanks :thumb:
 
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bh13coupe

bh13coupe

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dropped the car into my indie. He has suggested the actuator unit goes to AC Tronics who test and repair actuators on Mercedes Turbo's. I will follow this route and post back if its a success.
 

E270 Owner

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It will probably be condemned and a complete replacement turbo unit recommended.

Shame as I repair many of these at a fraction of the reconditioned cost.

They usually need stripping down and cleaning internally,
there's nothing special about these turbos,
but you might be told there is :)

Also the wiring needs checking to the actuator as it can throw the same code,
the EGR valve and map sensor also need checking/cleaning.
 
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pnevesfoto

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Yes you can get them separately,
but if the turbo is causing the positioner to stick due to carbon deposits it will cause the same fault,
in worst cases the worm gear gets stripped on the positioner.

I would advise taking the turbo off and cleaning off the vnt vanes and assembly,
but to test first on the car, take the actuator arm clip off and see if the rod moves the vanes freely around 10mm without snagging.

today I made this video on my car... I am looking for a solution for me as well... same trouble, same symptoms...

 

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