
12 Feb 2010
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Veteran HUBBer
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Join Date: Feb 2005
Location: LONDONISTAN, England
Posts: 1,034
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Quote:
Originally Posted by Boanerges
The hydraulic timing chain tensioner on these engines relys on oil pressure to work And it is possible if the engine is stalled in gear for the crank to turn backwards enough to snatch on the chain tensioner causing a momentary slackness which allows the chain to jump on the distributor pump sprocket.
It will jump one or two teeth, enough to stop it running.
I have only heard of this happening twice on an Iveco 4x4 usually caused by starting the engine in gear and dumping the clutch before it's got up momentum resulting in a stall.
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Are you sure about this? surely if the chain or belt was to jump any sprocket it would cause all the timing gears to be out of sync. I once came across a small Renault van that passed the UK emissions test although it was 'white smokin' and the problem was caused by a previous mechanic fitting a timing belt one tooth out, the van appeared to be not suffering any lack of power, but was obviously not timed correctly.
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