Clk om642 engine reliability

[ash1212002]

Found a 320 cdi clk 71k on the clock which has the om642 engine 2007 reg

How reliable is this engine? Anything to look out for?

Were any changes/modifications made to the engine for the clk in later years?

 

[Cole@MBS]

There are hundreds of thousands of these engines out there with out ever having a fault but I will list a few faults of the top of my head,

Turbos
Inlet port shut off motors
Front main bearings
Front and rear main seals
Glow plugs snap off in the heads
Oil cooler seals flood out
Timing chains
Inlet manifold flaps links wear out
Front EGR pipe firs up with carbon
Black Death
Exhaust manifold lining come off and hit turbo vains
Water pumps leak

Probably a couple of other bits but that’s few.......

 

[ash1212002]

There are hundreds of thousands of these engines out there with out ever having a fault but I will list a few faults of the top of my head,

Turbos
Inlet port shut off motors
Front main bearings
Front and rear main seals
Glow plugs snap off in the heads
Oil cooler seals flood out
Timing chains
Inlet manifold flaps links wear out
Front EGR pipe firs up with carbon
Black Death
Exhaust manifold lining come off and hit turbo vains
Water pumps leak

Probably a couple of other bits but that’s few.......

Blimey! Is it best to avoid the 320 clk diesel engine?

Anything I could look out for if i do decide to view and consider purchasing?

How does the 320 compare to the 220 cdi in terms of issues?

 

[LostKiwi]

There are hundreds of thousands of these engines out there with out ever having a fault but I will list a few faults of the top of my head,

Turbos
Inlet port shut off motors
Front main bearings
Front and rear main seals
Glow plugs snap off in the heads
Oil cooler seals flood out
Timing chains
Inlet manifold flaps links wear out
Front EGR pipe firs up with carbon
Black Death
Exhaust manifold lining come off and hit turbo vains
Water pumps leak

Probably a couple of other bits but that’s few.......

Talk about putting him off!

 

[John Laidlaw]

Is that list ( or at least the majority of it) not common to a number of most Mercedes diesels?

 

[Cole@MBS]

I would have the 4 pot and get it remapped, less to go wrong,

Sorry about the list, the chap asked !!

 

[Cole@MBS]

The ex run a 642 up to 320000 miles without any of the above problems!!

 

[ash1212002]

I would have the 4 pot and get it remapped, less to go wrong,

Sorry about the list, the chap asked !!

Had a clk 200 previously but now looking for a diesel although will be used for short journeys and odd long journeys.

220 remapped what can it achieve?

You recommend the 220 over the 320? If so any advice on what to look out for?

 

[Avnt]

The ex run a 642 up to 320000 miles without any of the above problems!!

Thats some miles was it a taxi or something


Sent from my iPhone using Tapatalk

 

[Wighty]

Found a 320 cdi clk 71k on the clock which has the om642 engine 2007 reg

How reliable is this engine? Anything to look out for?

Were any changes/modifications made to the engine for the clk in later years?

Forums are a collection of horror stories , as Cole says , some can run trouble free . I have an E320cdi om642 on a 2009 , same engine as the clk . It is a wonderful engine , drive the 220cdi and you will know all you need to .

 

[malcolm E53 AMG]

The 642 V6 diesel is quite refined and I would buy another. Cole’s list is generic and you may have one or two of the issues listed occur in your ownership but that’s the same with any car. As already said try both the 4 pot and 6 pot and there is only one winner

 

[M80]

Had a clk 200 previously but now looking for a diesel although will be used for short journeys and odd long journeys.

220 remapped what can it achieve?

You recommend the 220 over the 320? If so any advice on what to look out for?

Diesels aren't the best for short journeys, especially if it has the DPF.

As for remapping I would first consider the style of driving you are likely to use it for. If you enjoy the right foot response then max power / torque is good, if you plod like me then the extra power isn't really needed. Although the motor can feel easier at lower revs, around town for example.

The V6 320 CDI is smoother and quieter than the 220 CDI.
I would expect it would be easier to find a 220 without the DPF and that would make the consumption difference between them significantly different.
The early C class 320 had the option of a DPF, as I understand the Viano 320 all have a DPF, with the CLK I can't comment.

If you get the VIN no of the CLK and post it here someone will tell you if it has the DPF.

 

[ash1212002]

Diesels aren't the best for short journeys, especially if it has the DPF.

As for remapping I would first consider the style of driving you are likely to use it for. If you enjoy the right foot response then max power / torque is good, if you plod like me then the extra power isn't really needed. Although the motor can feel easier at lower revs, around town for example.

The V6 320 CDI is smoother and quieter than the 220 CDI.
I would expect it would be easier to find a 220 without the DPF and that would make the consumption difference between them significantly different.
The early C class 320 had the option of a DPF, as I understand the Viano 320 all have a DPF, with the CLK I can't comment.

If you get the VIN no of the CLK and post it here someone will tell you if it has the DPF.

Based on what I have researched thus far my understanding is that neither the 220 or 320 had dpfs

om642 is what i believe was fitted to the 320 and om646 was in the 220, i dont believe the clk ever had the om646 evo fitted?

Predominantly the car would be used normally but would also enjoy having the torque and power on tap when needed

Based on my circumstances I'm thinking the 220 would suit me most, smaller engine more economical and suited more for short journeys compared to the 320 as i will be unable to exercise the engine very often, unless someone could tell me otherwise.

I plan to keep the car long term and intend to maintain and service it myself

In terms of reliability is the 220 engine more reliable than the 320?

 

[M80]

In terms of reliability is the 220 engine reliable than the 320?

IMO the simple answer is yes.
Of that age the 220 will still have the easy to snap glow plugs, otherwise a robust engine known to do stella mileage.

The 320 is superior in the drive though. Still reliable with many high mileage examples around.
TBH if your sure the 320 won't have a DPF I would choose that over the 220. If it turns out to have a DPF leave it.

 

[ash1212002]

Ok great! Thanks for your input

Finding a fully loaded 320 or a 220 low mileage with xenons, heated seats, memory seats, sat nav are very rare, so need to be patient to find the right one!

Sunroof on these models are also very rare!

Ideally would also want an 58 or 09 year as i believe 09 was the last build for the clk

 

[Wighty]

Ok great! Thanks for your input

Finding a fully loaded 320 or a 220 low mileage with xenons, heated seats, memory seats, sat nav are very rare, so need to be patient to find the right one!

Sunroof on these models are also very rare!

Ideally would also want an 58 or 09 year as i believe 09 was the last build for the clk

Remember they all need an ATF oil and filter change at 37500 miles , and ideally every 40k miles after that .
My 2009 E320cdi has no DPF , although plenty of earlier ones than that do have them .

 

[ash1212002]

Remember they all need an ATF oil and filter change at 37500 miles , and ideally every 40k miles after that .
My 2009 E320cdi has no DPF , although plenty of earlier ones than that do have them .

Do they have the 7g gearbox? I thought that it was for life but have heard it is good practice to do at 50 or 60k

 

[malcolm E53 AMG]

Yes still some low miles 09 plate 320 sport models around and by that time the 211 was very well sorted, as already said just check the VIN re DPF. You are almost in 212 territory price wise but they do all have a DPF but to be honest I do similar mileage to you without problem the main thing is that you know about DPF and low mileage issues and accommodate it, when mine starts a regen I run the car till it finishes the cycle if I can

 

[Wighty]

Do they have the 7g gearbox? I thought that it was for life but have heard it is good practice to do at 50 or 60k

Yep , 7g . I think the sealed for life argument ran out in 2004 ish , it was replaced by sealed for death . I think for a few years before my cars production date MB specified a one off ATF service at 37500 miles . It has become adopted by others who read too much and want to keep their car long term to keep up this schedule .

 

[Wighty]

As an example of cars with horror stories your car ( and my clk )has an M271 engine , if you read the Internet on that one you would never have bourght it