• The Forums are now open to new registrations, adverts are also being de-tuned.

Piston mealted

rf065 said:
Not maximum speed, but I drove a CLK220CDi non stop from S. France to Glasgow in 20 hours. Subtracting a ferry crossing and fuel stops, that equated to 16 hours driving at an average of 75mph.
The engine was still like new after that and even at 150,000 miles burns no oil between services.
Click to expand...

My OM648 with around 265K burns no oil between services, nor does my OM651 now on 175K!

Regular servicing is all you need :)
 
MWCLS said:
When I sold my S ( OM648 ) it was on 147k.. never had any issues with the lump.. the rest.. I'll say no more! :(
Click to expand...

The OM648 is one of the best Diesels MB produced imo
 
I don't think it's actually mentioned but presumably there was still the correct level of oil in the sump after the seizure? Oil pump problem?

I can't see that injector cleaner additive, if that's what it was, would cause the problem. More powerful versions of the same engine might be a fairly straightforward physical swap but I'm not sure about the various electronics. It's going to be a difficult call between fitting an unknown quantity engine and simply buying another car - too many variables to really know the best option.
 
If poster needs to move at this sort of speed , then a helicopter is his best bet,, or to start his journey i hour early and take his time. . At 130mph it would damage any engine even in tip top condition . But i wounder if its kph and not mph.
 
Tonygw said:
why would it dmaage the engine at 130mph?
Click to expand...

My point exactly
 
Could really be a number of things if a piston has "melted" without looking at the piston itself it could be bad injection/over fuelling which would cause the piston to melt from top down i'd imagine or a blockage in the cooling system, seizing the piston causing scouring around the sides who knows !?

Traveling at that speed may not of necessarily (probably did) caused the fault but certainly didn't help it .... unless personally attached to the car it's a write off.
 
Too high a fuel to air ratio will cause excessive temperatures. Inefficient intercooler or turbo not boosting enough will also cause it. A standard well maintained engine should be sale to run for long periods of time at near the red line. I have a modified diesel Toyota and have fitted a gauge to monitor exhaust gas temperatures
If I push too hard then temps can go over 800c which will cause problems!
 
Running it hard probably just exposed an underlying weakness. You've got to think how hard those engines are worked in Sprinters, a high speed run in a small saloon should be nothing.
 
Years ago I gave a BMW 2 litre petrol a good sprint at approx 140k miles.
It had no issue performing but overheated and needed breakdown to get home.
The well used water pump impellor had near disintegrated, whether due to me booting it or just mileage I don't know.

In that case a new water pump and away it went happily again.

The op is just unlucky I guess.
 
clk320x said:
Driving a car at its maximum speed on a motorway should not cause the pistons to melt...
Click to expand...
It did to me in a Saab 900 Turbo although the wastegate had been altered and I was naive enough not to realise. Didn't seize, just failed loudly on the off ramp on the M11 one day, and never ran again. Two of the pistons had melt holes and a lot of random metal all over the place. Super unusual though, but a white hot turbo and a stupid driver (me) can indeed melt pistons.
 
It's pretty obvious that english is not the poster's 1st language, so I wonder if his "Mealted" is actually something else? we know that it's piston damage ( or are pretty sure anyway) but what kind of damage? I once saw the metal tip of a spark plug fall off, and burn a hole in the piston crown, so it's not impossible, but I wonder what actually happened in this case?
 
You must log in or register to reply here.

Users who are viewing this thread

Total: 2 (members: 0, guests: 2)

Similar threads

V
Vito v6 om642 white smoke
Replies
11
Views
2K
Gnasher141
Gnasher141
Bassmonster
Coolant Leak - W212 65 reg OM651 engine - Head Gasket?
Replies
12
Views
2K
KeithDee
KeithDee
A
Oil Leak fixed now exhaust smoke?
Replies
3
Views
704
Andy084
A
R
Vito 113CDI 2015 - P0269 Cylinder 2 Contribution/Balance fault
Replies
0
Views
158
RobbieC1974
R
T
Random coolant temperature Picture on multi-function display
Replies
0
Views
320
Tech2Zero
T
Back
Top Bottom