ChrisGoulding

Won't start after timing belt change

12 posts in this topic

I'm after some help on my wife's 2006 golf plus 1.9 tdi. I changed the timing belt and since then it won't start. The engine turns over but won't start. I locked the cam and crank for changing but everytime I turn the engine over the timing marks are out. The cam is lined up but the crank is about an inch clockwise. Would this stop it starting? It got dark so I couldn't carry on but is it likely that I just need to do the timing again? I would have thought it would start even if running rough. I've ruled out an air lock in the fuel lines.

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Probably, yes. The evidence would also suggest it would.

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I've tried again this morning and the crank is definitely aligned and the cam locking pin is in the correct location. However, when I try to manually turn the engine it stops after a small clockwise turn like it is hitting the valve. Without the timing belt on both crank and cam will turn. Any ideas??

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Yes - you've not got the timing marks properly aligned on the crank and camshaft.  Don't try to start it, or you'll cause expensive damage.

 

You can align it all visually - there's timing marks on the crank and cam pulleys, as well as the case and the head.  No exact alignment means it's wrong.

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I've refitted it and the lock pin is in the centre of the groove on the cam and the crank lock is firmly in place with the crank arrow at tdc. Yet when I turn the crank by hand it stops hard. If I take the tb off again, both with turn ok. Where am I going wrong? I've done a few tb changes and never encountered this problem.

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I'm assuming that a valve has got bent during the initial test? Could that stop the engine turning by hand?

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I wouldn't have thought so, if the timing marks are now properly aligned, the valve (even if bent) shouldn't be bear enough to the piston.

I guess you'll have to do a compression test.

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I thought that too. I would have thought that if a valve was bent it would have bent out of the way not making it stop dead. Could there be a something under the cam cover jamming it like a stuck/damaged lifter etc?

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Fixed. The timing was out but not my fault. Apparently VW made a few faulty crank shaft pulleys with the arrow in the wrong place. It turns out tdc is in a different place as explained in this vid http://m.youtube.com/watch?v=_bhCRr-H2yw

Thought I would post up the solution to help others who may be browsing the forums.

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Glad you got it sorted, if it wasn't for the internet, you'd have been goosed!

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Rubbish!!! There would have been a recall or QE on said issue. Either pulley was shot completely or user error......if it ran tidy to start with then there's only one port of call.......tidy

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