Hi Thank you for that. However I need some more information. The bill for the previous occasion was:
The repair was carried out by a MB main dealer.
When they examined care on this occasion would they have seen if there was a build up of oil sludge?
The car was regularly serviced and any occasion when the warning notice to add a litre of oil came up on the display it was added.
Presumably on examination the garage should also be able to tell me if the chain stretched?
I don't quite understand your comments about MB experts
What is the effect of not changing the chain slide rails?
You mentioned the possibility of worn sprockets not being replaced on the first occasion but how would one know if they were replaced or not?
I presume when they say the chain slipped that it jumped a tooth or teeth?
Would the chain and sprockets not need to be very worn to do this?
How unusual is it for the chain to slip after .only 42,000Km or 30,000 Miles done since the chain was first replaced.
There were 8 valves damaged
Can you comment on the chain slide rails?
Also on the worn sprockets issue?
Attachments are only available to registered users.
I spoke with garage and they say there is no evidence of worn sprockets.
They also say there is no evidence of oil sludge
Excuse the questions but I'm not mechanically minded at all but are you saying the slide rails would have to have broken to cause the chain to slip?
If they didn't break, there is no evidence of oil sludge and no sign of worn sprockets does that just leave the tensioner as the cause?
What test is done to check the oil pressure?
Ok but presumably they cannot do this test until car is repaired?
What's a good or bad result?