OM651 diesel engine

Uncle Benz

Senior Member
Joined
Mar 31, 2006
Messages
3,404
Reaction score
2,024
Age
50
Location
West Sussex
Your Mercedes
Mainly Mercedes
Seems Mercedes have not resolved their recent M271 timing chain issues with the new oM651 engine.

ca90006e9753d7f7b4c602f486499053_zpse0346835.jpg


This is with the tensioner still in. Note the pile of chain on the right side of the picture.
 
Last edited:

Frontstep

Senior Member
Joined
Apr 22, 2007
Messages
7,874
Reaction score
1,685
Your Mercedes
T210 320cdi
Thats within manufacturers tolerance sir !
Or "we have never had that before"
 

turbopete

Senior Member
Joined
Feb 4, 2009
Messages
14,204
Reaction score
328
Age
45
Location
Spennymoor
Your Mercedes
2010 '60' Ford Mondeo 2.0TDCi Zetec (sorry)
how many miles has that engine done, for that to happen?
 
OP
Uncle Benz

Uncle Benz

Senior Member
Joined
Mar 31, 2006
Messages
3,404
Reaction score
2,024
Age
50
Location
West Sussex
Your Mercedes
Mainly Mercedes
  • Thread Starter
  • Thread starter
  • #5
120k, but apparently they can go bad much earlier.
 

star

Forum Supporter
Authorised Forum Supporter
Joined
Oct 6, 2004
Messages
5,800
Reaction score
1,230
Location
Reading
Your Mercedes
Smart + others :)
Yes we have seen several at 70-90k that rattle so bad after draining the oil and a filter change, I was praying it wasn't going to jump a tooth or so. :(

I'm still waiting for the tool from Mercedes hat determines what parts require replacing depending on the streatch.

Few broken teeth there too, they going to be a pain to fetch out of the sump.
 
Last edited:

ernieh

Senior Member
Joined
Nov 20, 2006
Messages
1,522
Reaction score
112
Location
Scotland, East
Your Mercedes
205 / 67 / C220 d
Is this an engine-out job or does it depend on the damage? Looks like our next C could be a petrol...but then that's a 271, isn't it?

Ernie
 

grober

Senior Member
Joined
May 15, 2002
Messages
2,942
Reaction score
23
Location
Scotland
Your Mercedes
W204 C200cdi estate
Problem with the OM651 is the timing gear is at the rear of the engine, so if extensive work is required its an engine out job I think. The OM651 in various states of tune is almost ubiquitous across the Mercedes range from the A class to the CLS/ ML. Lets hope there's an insitu fix or modification [ duplex chain??] in the pipe line.

ps if its any consolation BMW had similar problems on their recent 4 cylinder diesels fitted from Mini to 5 series --- its all to do with shorter/shallower engine blocks to afford more air space under the bonnet for pedestrian collision safety I am led to believe.
 
Last edited:

turbopete

Senior Member
Joined
Feb 4, 2009
Messages
14,204
Reaction score
328
Age
45
Location
Spennymoor
Your Mercedes
2010 '60' Ford Mondeo 2.0TDCi Zetec (sorry)
its all to do with shorter/shallower engine blocks to afford more air space under the bonnet for pedestrian collision safety I am led to believe.

educate pedestrians to LOOK for cars before crossing roads etc and that the PAVEMENT is for pedestrians, the roads are for CARS

after all, i dont see many 'pedestrian friendly' shaped buses, HGV's etc
 

Stability

Senior Member
Joined
Jan 11, 2014
Messages
174
Reaction score
14
Location
UK
Your Mercedes
Mercedes
MB changed the chain they used on the 271 because it used to stretch.

Now they have the chain problem sorted - they obviously did bugger all about the sprocket quality.

With all the crap they had with the 272 engines you think they would have sorted this crap out.

But……….. it keeps us indies busy
 

star

Forum Supporter
Authorised Forum Supporter
Joined
Oct 6, 2004
Messages
5,800
Reaction score
1,230
Location
Reading
Your Mercedes
Smart + others :)
You'd think they would have learnt from the 102 engine........... wait the DID and then fitted a duplex chain to later 102 engines. Perhaps the young deigners/engineers of today can't remember that far back.
 

Stability

Senior Member
Joined
Jan 11, 2014
Messages
174
Reaction score
14
Location
UK
Your Mercedes
Mercedes
dawn right - recently done a 113 heads and had to stand back with a fag admiring the chain for 5.
 

star

Forum Supporter
Authorised Forum Supporter
Joined
Oct 6, 2004
Messages
5,800
Reaction score
1,230
Location
Reading
Your Mercedes
Smart + others :)
Not looking good for the 651 engine, we had 2 cars delivered by recovery truck last week, both new to us and both 10 plates, one had a loose timing chain tensioner and lost its oil and threw a rod (only ever been serviced at merc). The other which also had been serviced at mb and to be fair they did report a noisy chain has now got a snapped chain.
 
Last edited:

stumo

Senior Member
Joined
Sep 4, 2008
Messages
422
Reaction score
48
Location
VIC, Australia
Your Mercedes
ML270CDI 2002 facelift| Sprinter 316CDI 2003 LWB
What mileage did they have on them?
 

star

Forum Supporter
Authorised Forum Supporter
Joined
Oct 6, 2004
Messages
5,800
Reaction score
1,230
Location
Reading
Your Mercedes
Smart + others :)
What mileage did they have on them?

The one with the loose tensioner and thrown a rod has 70,000m and the other 110,000m. Both main dealer serviced and maintained, not seen either car before.

I expect we will start to see alot more of them with similar problems, we have ordered all the special tools for the job.
 

star

Forum Supporter
Authorised Forum Supporter
Joined
Oct 6, 2004
Messages
5,800
Reaction score
1,230
Location
Reading
Your Mercedes
Smart + others :)
Edit that, 50,000 and 78,000. :(
 

television

Always remembered RIP
Joined
Mar 14, 2005
Messages
164,074
Reaction score
330
Age
86
Location
Daventry
Your Mercedes
2002 SL500, 216 CL500, all fully loaded
Do not these lengthy jobs upset the normal running of a workshop, 2 or 3 of them at the same time must upset the normal flow of work.
 

star

Forum Supporter
Authorised Forum Supporter
Joined
Oct 6, 2004
Messages
5,800
Reaction score
1,230
Location
Reading
Your Mercedes
Smart + others :)
Do not these lengthy jobs upset the normal running of a workshop, 2 or 3 of them at the same time must upset the normal flow of work.

Yes it can but we tend to set aside one man to do these type of jobs. We sent the 50k mile car to mb as it was only just out of warranty and had only been worked on by them, £320 +vat later, no goodwill. :( so it's going to be back with us.
 

Corned

Senior Member
Joined
Jun 25, 2012
Messages
1,470
Reaction score
5
Age
118
Location
East Midlands
Your Mercedes
2005 S211 E320CDI Avantgarde
I'm amazed MB have any customers left.

But it's great news for the indies - you're going to be very busy for years to come with these continuing problems MB repeatedly wash their hands of.

I was thinking of a new career anyway - I think I now know what to go and do!
 

star

Forum Supporter
Authorised Forum Supporter
Joined
Oct 6, 2004
Messages
5,800
Reaction score
1,230
Location
Reading
Your Mercedes
Smart + others :)
I'm amazed MB have any customers left.

But it's great news for the indies - you're going to be very busy for years to come with these continuing problems MB repeatedly wash their hands of.

I was thinking of a new career anyway - I think I now know what to go and do!

We would rather not being carrying out these sort of repairs, its too time consuming and I'm sure some customers think it down to us for the design and poor materials used. :(

I feel for the customer who has the short end of the deal.
 


Online parts website for Mercedes:www.partsformercedes-benz.com
Parts for Mercedes-Benz provides a wide choice of OEM (Original Mercedes), quality aftermarket and performance mercedes parts at competitive prices. Our clear, easy to use online store takes the headache out of having to search for that part or accessory you need, with a service that is second to none.
Top Bottom