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Old 08-07-2013   #1
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2004 2.0jtd Died after cam belt change.But belt is ok.

This weekend I changed my cam belt and water pump.It wasn't the first time i had done the cam belt and i had no problems after the first change.Took it on a short test drive and all was ok. Today went a bit further (about 2km)and there's a banging sound from the engine but it's still running,thought i might have broken something on the exhaust while raising and lowering the engine so tried to get home to check. Didn't make it, engine clattered and died.Got recovered home and checked timing belt, it's fine and the timing too.The engine turns over and almost runs but thumps to a halt.
So thought OK I'll look to see if there are any fault codes before i start disassembling the engine to look for broken things.No response from ECU.I did connect to it the day before when the engine was running.
So my first question is could the ECU or a sensor failure cause what sounded like the innards of the engine disintegrating?
The second question is should i start at the top or the bottom of the engine to look for breakages?
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Old 08-07-2013   #2
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.

If the timing was out you could have bent the valves, but usually it won't run when it's that far out.
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Old 08-07-2013   #3
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.

Either way, best to start at the top.
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Old 08-07-2013   #4
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.

I'd check the timing again, so make sure it hasn't jumped a tooth.
Is there a cam sensor on these, and is it still in the right place?
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Old 09-07-2013   #5
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.

Been running through what could happen all night and wonder if it is worth trying to fix this in my garden in the middle of Sweden.If the valves are bent could i actually manage to replace them or would i be forced to get a rebuilt head and then be stopped dead if i could not get the injectors out of the old one.I think if it were just a van it could be considered uneconomical to repair but as it is a motor caravan it seems to be more valued.
It has no value in Sweden as it is UK registered and can't be registered here because of no type approval etc. Don't want to spend thousands fixing it just to get it back to UK.
May put it on Ebay in case there's a better mechanic who wants to come and stay in it while he or she repairs it and then takes it away.
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Old 09-07-2013   #6
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.

You can replace the valves with the right tool, hardest part is removing the stem seals (if you decide to replace these, which is normally good practice) form the valve guides without doing any damage. You might have to get the head skimmed when you've stripped it and may be need a larger gasket, But wit diesels, I usually find if the head's cold you can get away without skimming the head.
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Old 09-07-2013   #7
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.

Valve spring compressor.
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Old 09-07-2013   #8
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.


Hi. I wouldnít start stripping the engine just yet; when you say no response from the ECU on the code reader does it not connect to the ECU, have you got the ignition turned on?

When you jacked the engine make sure you didnít break the engine earth strap and check carefully all electrical connections especially the ECU plug and the ECU earth.

If the timing is still O.K I donít see why the valves would be damaged unless by coincidence you have dropped a valve, not very likely and you would hear it popping when you turned it over it would probably still start on three cylinders anyway.

If the ECU or cam/crank sensor is faulty or loose connection you can sometimes get a banging type sound.



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Old 09-07-2013   #9
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.

Don't know on this engine, but the cam sensor is usually in there somewhere under the cover.

Earth strap is a good idea as well, there must be something stopping the ecu communicating.
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Old 10-07-2013   #10
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.

ECU started responding now that i have calmed down a bit.No fault codes though.
Upon reflection and having turned the engine over by hand to check the belt I think i have carelessly just topped up the coolant and not made sure all the air was out of the system and so partially seized one or more of the pistons.Bought an old car yesterday so the pressure is off and i can spend some time investigating my options.Doing my sums it's been interesting to see how much NOT running a motor caravan can save! Thanks for the suggestions.
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Old 10-07-2013   #11
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.

sorry to hear that, doid you replace / disturb the waterpump..??
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Old 10-07-2013   #12
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.

Yes i did replace the water pump all parts SKF.Today I'm on the net checking out the Swedish motor rebuilding services.It's funny all the sites I've looked at in UK and SWE seem similar, it's like they are all just conduits to the same place,just like whoever i order tyres from on the net if i follow the tracking they always start from the same town in Germany.
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Old 10-07-2013   #13
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.

I've overheated (not terminally) a car after replacing the coolant.
Normally it smells very badly of hot oil even if you catch it in time.
I would guess you opened the bonnet when you got home, did it smell hot?
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Old 10-07-2013   #14
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.

As Mikey 72 said you would smell a cooked engine, 2k doesnít seem far to seize a diesel engine if it had some coolant in it, I think the JTD has a temperature warning light also.

EGR valve is a very common fault on the JTD takes about 20 minutes to blank it and cost nothing might be worth a go, when they jam up you get a severe loss of power and a sort of backfire type noise then it dies sometimes it will restart but not always.

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Old 10-07-2013   #15
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Re: 2004 2.0jtd Died after cam belt change.But belt is ok.

Worth doing a compression test, or at least getting the cam cover off being any major work, and bar the engine over and see what the valves are doing.
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