W204 (651) CDI Turbo Replacement

K1AN1

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So after sending the car in to have the leaky injector repaired they have advised that the turbo needs to be replaced:(

Not so bad, I was expecting them to say the engine was knackered. Was just wondering is this a DIY job? My dad and I have worked on plenty of other cars (all be it older) but never a Mercedes before. Just wanted to make sure there isn't any "specialist" equipment/procedures required? That's said, we did manage to get the inlet manifold gasket replaced in about 5 hours :) That doesn't include getting the wipers, battery try, bulk head heat shield out ;-)

Although, when driving, the turbo seems to work just fine! Could it be a case of oil seals? TBF to the indy, they did say given the amount of smoke coming out it's likely to be the turbo.

Thanks
 

Sander1337

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Its a doable job (you can access it fairly easy from about and below, but expect a full days work if you have never done it before. An experienced mechanic can do it in 2-3 hours.
 
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K1AN1

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Its a doable job (you can access it fairly easy from about and below, but expect a full days work if you have never done it before. An experienced mechanic can do it in 2-3 hours.

Awesome, that's good to know, we always prefer, enjoy a DIY :)

Thanks
 

star

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Oil coming from the Operating shaft/lever is a clue, plus smoke.
So after sending the car in to have the leaky injector repaired they have advised that the turbo needs to be replaced:(

Not so bad, I was expecting them to say the engine was knackered. Was just wondering is this a DIY job? My dad and I have worked on plenty of other cars (all be it older) but never a Mercedes before. Just wanted to make sure there isn't any "specialist" equipment/procedures required? That's said, we did manage to get the inlet manifold gasket replaced in about 5 hours :) That doesn't include getting the wipers, battery try, bulk head heat shield out ;-)

Although, when driving, the turbo seems to work just fine! Could it be a case of oil seals? TBF to the indy, they did say given the amount of smoke coming out it's likely to be the turbo.

Thanks

The amount of smoke, colour of smoke and oil dripping from the turbo actuator/cane lever arm was a clue. :)
 
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K1AN1

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Oil coming from the Operating shaft/lever is a clue, plus smoke.


The amount of smoke, colour of smoke and oil dripping from the turbo actuator/cane lever arm was a clue. :)
Oil coming from the Operating shaft/lever is a clue, plus smoke.

Oh you guys are here!

Thanks for your work today, left you a +review on Google :)

I think we also live on the same estate have seen the smart parked up!
 

star

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To be 100% sure, remove exit Pipe from turbo.
 
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K1AN1

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If STAR are saying it’s likely the turbo then I’d trust his judgment,

Oh I will/do, they have a very good rep in Reading which is why I went.

Star, wasn't questioning your judgement, was just trying to clutch at straws ;)
 
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K1AN1

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So, I'm almost there with the turbo removal, just need a coupe of pointers if any one has had any experience. I think the only I need to remove is the oil return pipes. Everything else is off. Following the Mercedes manual it says to remove the alternator, which according them includes lowering the steering rack etc. Just wanted to check, is this necessary, or could I do by just removing the alternator by removing the four bolts and belt obviously.

Am struggling with one bolt (bottom) as its to close to the subframe and can't get a socket on there. I'll grab a star spanner tomorrow, just wanted to check, once the alternator is out of the way, it's just the oil return pipes I need to remove from the bottom?

Many thanks
 

Frontstep

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My car had some similar symptoms and my new Turbo has made not a jot of difference.
 
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K1AN1

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To be 100% sure, remove exit Pipe from turbo.
Would this be the turbo to intercooler pipe right? Had it off, there was a bit of oil around the connection, but to be fair, the inside of the pipe was quite clean, but the outside was quite mucky. I defo have an oil leak form somewhere, whether that be the sump gasket, or rocker cover gasket.

How much play should there be in the turbo shaft, I could move it a but when I checked it. I know there is usually a little play, but when moving it it would "knock/click" against the housing.
 
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K1AN1

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My car had some similar symptoms and my new Turbo has made not a jot of difference.
Did you manage to figure out what it was?
 

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Would this be the turbo to intercooler pipe right? Had it off, there was a bit of oil around the connection, but to be fair, the inside of the pipe was quite clean, but the outside was quite mucky. I defo have an oil leak form somewhere, whether that be the sump gasket, or rocker cover gasket.

How much play should there be in the turbo shaft, I could move it a but when I checked it. I know there is usually a little play, but when moving it it would "knock/click" against the housing.

no the exit side (exhaust)
 

ajlsl600

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clk3202001,sl6002003 with everything regrettably sold ,A class 170cdi auto. NG/TF1800 ML250
Would this be the turbo to intercooler pipe right? Had it off, there was a bit of oil around the connection, but to be fair, the inside of the pipe was quite clean, but the outside was quite mucky. I defo have an oil leak form somewhere, whether that be the sump gasket, or rocker cover gasket.

How much play should there be in the turbo shaft, I could move it a but when I checked it. I know there is usually a little play, but when moving it it would "knock/click" against the housing.
It should not be touching the housing .check that's not carbon build up a good turbo will have near no up down play on spindle if it has chances are seal leaking too.
 
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K1AN1

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So had exit pipe off today and not signs of any oil in the turbo, it was dry,plenty of carbon buiod up, but not a drop off oil. I do have an oil leak from that side of the engine, possible the return pipe to the block.

Not sure if I should replace the turbo with used one I have! I may put her back together, run some injector and DPF cleaner throug it to see if that makes another difference.
 

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If no oil in exit side, you need to determine where the smoke is being generated from?? The reason we thought turbo, oil leaking from spindle to vanes and no other oil leak in area, plus oil smoke. The worry now is what is causing the smoke.
 

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