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 Post subject: Timing chain misery
PostPosted: Mon May 15, 2017 12:19 am 
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Location: Cumbria
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Well, I replaced the chain and tensioner on the vacuum pump for the servo and...

...it still rattles! I've listened with a screwdriver to both ends of the engine and I think it's maybe sounding a bit louder from the timing chain end. I took the cam cover off (AGAIN) and the new vac pump chain and tensioner felt fine, so I think I'm resigned to doing the bleedin' timing chain now! :headbang: :bigcry:

I'll be trawling the forum for threads on this, but in the meantime, if anyone has done the job themselves, I'd be grateful for any hints and tips! Has anyone done it without taking the engine out?


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 Post subject: Re: Timing chain misery
PostPosted: Mon May 15, 2017 6:47 am 
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Joined: Mon Apr 02, 2012 2:09 pm
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Model: T30 2.2 dci
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Mods: Diesel powered pre/aux heater, 4wd working monitor, Ring Xenon ultramax+120.
Been there done that.
The engine mount must come off then with a floor jack and wood block you can move the engine up and down to get to the chain cover bolts.
If you deside to to the lower chain too, I do not the english word for is but the aluminium oil pan,(above the steel oil pan) has to come off too. It has 2 additional hidden bolts under a cover near flywheel. My brother did not find them and he destroid it.

Can you but a youtube video here too?

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 Post subject: Re: Timing chain misery
PostPosted: Tue May 16, 2017 8:09 pm 
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Like Ahto said remove the lh mount and it gives access i used a telescopic mirror and a torch to align the timing dots

i have a very useful manual on the 2.2 engine i can email you if you wish


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 Post subject: Re: Timing chain misery
PostPosted: Wed May 17, 2017 10:49 pm 
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Xtrail Nut

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Thanks Ahto, that's interesting. I didn't know there were two chains! Is it only the top one that tends to get noisy?


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 Post subject: Re: Timing chain misery
PostPosted: Wed May 17, 2017 10:50 pm 
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Xtrail Nut

Joined: Mon Dec 27, 2010 6:11 pm
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Colour: Silver
Thanks Davy, as the car ages, that would be fantastic, thanks ever so much! I'll PM you.


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 Post subject: Re: Timing chain misery
PostPosted: Thu May 18, 2017 8:36 am 
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Mods: Diesel powered pre/aux heater, 4wd working monitor, Ring Xenon ultramax+120.
The top strectes the moust, because the cam lopes when turnin over valves creates spikes, and that pots more stress on the chain. Of corse the best is to change both.

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 Post subject: Re: Timing chain misery
PostPosted: Thu May 18, 2017 11:59 am 
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davy-jeff wrote:
Like Ahto said remove the lh mount and it gives access i used a telescopic mirror and a torch to align the timing dots

i have a very useful manual on the 2.2 engine i can email you if you wish


Does it have anything on replacing the timing chain? Mine has started making a bit of noise and probably needs a look at....

thanks


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 Post subject: Re: Timing chain misery
PostPosted: Thu May 18, 2017 8:57 pm 
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not sure mate , i just bought it for the timing marks

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 Post subject: Re: Timing chain misery
PostPosted: Wed May 24, 2017 5:55 pm 
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Avocet, have just finished our vacuum pump chain and tensioner, and it rattles just the same.

Our local garage did it twice as well.

So my thinking is that it must be one of the timing chains, and generally only does it while
it warms up.

ATB


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 Post subject: Re: Timing chain misery
PostPosted: Thu May 25, 2017 3:53 pm 
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Location: Cumbria
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Colour: Silver
Yeah, that's exactly what happened to me! I can't explain why the noise shut up for a few miles after doing the vacuum pump chain though! The first time I did it, I just re-tensioned the existing chain and put it back together. Car was as good as gold for 1000 miles and I thought "YES! I've cracked it"! Then I got the odd, very faint noise and by 2000 miles, it was as bad as it ever was. I then did it again (replacing the chain and tensioner this time) and this time, it was fine for the first 100 miles and then deteriorated very rapidly. This time after only about 300 miles, it was rattling its brains out again. I took the cover off YET AGAIN and re-tensioned (although it wasn't very slack) and this time it made no difference at all.

All I can think of, is that the timing chain is "borderline" and that any backlash in the vacuum pump chain sends a shock load down the cam to the timing chain, which then sets the timing chain flapping. Now I think the timing chain tensioner will be sufficiently "cream crackered" to just flap of it own accord anyway - regardless of what happens with the vacuum pump chain.

(And yes, like you, it is worse when cold).

I used to hate timing belts on other cars, and a chain-driven cam was one of the big selling points when we bought the X-Trail. Now I'm kind-of thinking belts aren't that bad after all...!


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