Turbo Failure - Timing Belt Jumped 10 Teeth

[easymove]

Hi guys,

i have just joined this forum as my much beloved citroen has now decided to start playing up.

It is a C5 2.0ltr diesel tourer, running well untill on the aproach to a roundabout it kind of missfired like a petrol engine twice,

on leaving the roundabout it accelerated away, then went straight into limp mode with no power and sounded like it was running on two cylinders, I limped it home...its been into a diesel specialist, who suspected it was the turbo, but after plugging it into their diagnostics it showed timing errors, after inspection the timing had somehow jumped 10 teeth...they then said this would bend the valves as well, this was the case valves were bent....they have now said the crankshaft may also be bent,,, so my question is is this possible without damaging the belt and why did it jump the timing.....please help

[Johndouglas]

Have some teeth been torn off the belt?   Difficult to tell without removing it.    Is the belt tension still correct?    Maybe the tensioner pulley has moved.   When was the belt fitted?

[paul.h]

How many miles has the car done ? Some time back we had a topic where a C5 had not reached the years for timing belt replacement but had more than exceeded the mileage limit. The timing belt broke and wrote off the engine.

 

As well as the belt and its tensioner, there may also be a pulley and the water pump which do not last forever and should always be replaced when the belt is replaced.

[coastline taxis]

Is it a 8 or 16 valve engine

[MikeLane]

"As well as the belt and its tensioner, there may also be a pulley and the water pump which do not last forever and should always be replaced when the belt is replaced."

Surely the water pump is driven by the auxilliary belt. But I agree. This belt and the water pump should also be replaced at the same time as the cam belt - or earlier if the belt shows signs of cracking.

[easymove]

Hi guys the car is a 2010 , and has just turned a hundred and five thousand miles, I took it to citroen about a month and a half ago to have it replaced and they said come back when its near one hundred and sixty thousand...the belt was still under tension and had no damage to it , can the belt stay intact and bend the crankshaft is my question, can you help please

[coastline taxis]

the 16 valve has 2 camshaft,s 1 for exhaust and 1 for inlet . the timming belt turns only one of these shafts. there is a small chain that connect the 2 cams so i would imagine it,s the chain thats slipped.your easiest and cheapest way forward now is another engine and just drop it straight in or sell the car as spares or repairs

[Johndouglas]

Surely the water pump is driven by the auxilliary belt.

No Mike the pump goes into the block with the cambelt driving the pulley marked with red paint.

[MikeLane]

 

Surely the water pump is driven by the auxilliary belt.

No Mike the pump goes into the block with the cambelt driving the pulley marked with red paint.

 

Thanks for the info John (one learns something every day!).

[aspire_helen]

It is highly unlikely that the crankshaft is bent due to the valve and piston clash. My cambelt snapped on my 2001 2.2hdi at 75k miles before it was due a change, but outside warranty. I rebuilt the cylinder head myself for about £300 parts and materials on my driveway. I needed only replace the valve rockers. I crack tested the valves themselves satis and reused them. It appears to me that the engine is designed such that the rockers take all the damage , note on my diesel the valves are in line with the flat-topped piston crowns. If your engine has inclined valves, they will be bent. My engine has now run for a further 80k miles and 7 years with no problems.

I wish i had pursued citroen. In your case, if the car has only been serviced by citroen, and a citroen dealer advised against replacement, and the belt failed before it was due change, then pursue citroen vigorously. Do not be fobbed off. You may at least get a contribution from them. Only downside is that you hsve to suffer the cost of a citroen repair without knowing whether citroen will contribute, or can you do without the car for a few weeks?