I have just changed the timing belt on my 2007 1.9 JTD unfortunately after I had put the new belt on I was rotating the engine for the couple of turns before the final adjustment on the tension adjuster when the belt suddenly slipped forward a few notches, how many I have no idea this was because the tension wheel had flipped over the top. I had marked the bottom toothed cog before starting so is it just a case of lining this up and the TDC mark with the lines on the belt or is there more than one positions for the cam or piston stroke (compression/exhaust) etc. Any help please? :bang:
Technical Timing belt slipped.
- Thread starter mbarrass
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Technical Timing belt slipped.
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Just line them up again... The crank spins twice for every turn of the cam so all will be good once you realign.
When cranking by hand turn by the crank not by the cams.
Marty.
When cranking by hand turn by the crank not by the cams.
Marty.
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May not have been clear there(phone!!)
But valve positions will be fine... Yes you could potentially alter compression stroke to exhaust stroke on any particular cylinder but it makes no odds.
In fact I'll bet because IT IS an interference engine(piston can hit valves) you won't be able to alter strokes...but it doesn't matter if you do
Marty.
But valve positions will be fine... Yes you could potentially alter compression stroke to exhaust stroke on any particular cylinder but it makes no odds.
In fact I'll bet because IT IS an interference engine(piston can hit valves) you won't be able to alter strokes...but it doesn't matter if you do
Marty.
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I **** myself the first time I done this too...
However keep rotating the engine and they will eventually line up!!
However keep rotating the engine and they will eventually line up!!
Thanks for that especially the bit about turning the crank instead of the cam. I just carefully and slowly rotated the cam and crank, as the pistons and valves where knocking into each other, until they where lined up with TDC and my original line on the crank and 3 hours later job finished and engine running fine. The worst part of the job is having to work round the air con stuff that isn't on my copy of eLearn. Once again thanks for the advice couldn't have done it without it.
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Good stuff fair play to you.... A brave job to tackle... You just have to be confident in yourself that's all
Marty.
Marty.
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A mechanic at my local garage told me that sometimes to replace a timing belt, they cut the belt lengthways with a Stanley knife, remove half, and push the new belt on with the old one still in place. When the new one is in position, they cut the old one away, and push the new belt fully into place.
Seemed like a genius idea to me - keeps the timing intact.
Seemed like a genius idea to me - keeps the timing intact.
Nice idea!
No need for aligning anything, but ultimately will only save you a couple of minutes.
Thing is, on a Multi, you have to remove the Cam pulley to replace the water pump, and you have to replace the tensioner also . . .
No need for aligning anything, but ultimately will only save you a couple of minutes.
Thing is, on a Multi, you have to remove the Cam pulley to replace the water pump, and you have to replace the tensioner also . . .
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