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Author Topic: Timing belt issue  (Read 4959 times)

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dave.h

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Timing belt issue
« on: 06 April 2020, 16:34:53 »
Sorry to post again but I’m having major issues changing the timing belt on my V6.

I have all the cams and crank lined up and locked and am following the video.

Problem is that the new belt doesn’t seem to fit.

I line the double line up with the crank mark and wedge it and work Up the cam 1 and 2 side, exactly as in the video.

The belt goes on cams 1 and 2 and the marks align, it goes around the idler and on to cams 3 and 4  but the lines are out and the belt just won’t go around the idler. I took it off and with the belt on the idler won’t go back in as the belt is too tight.

Anybody got any words of wisdom I can use?

The kit is for the car and the back plate with the tensioner on is the same code as the one that came off.

It’s doing my bloody head in!!

Cheers in advance

A frustrated man!
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biggriffin

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Re: Timing belt issue
« Reply #1 on: 06 April 2020, 17:09:36 »
Don't bother with the lines, once you turn it over by hand they all go to cock, they are just there to make it easier to line the pulleys up,.  If you have the locks in, and the cam wheels line up with the marks on the back plate, and your bottom pulley hits the marks, and it's tensioned, then it's fine.  Last belt I fitted had so many marks it looked like a rainbow, and none of them lined up. :o
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TheBoy

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Re: Timing belt issue
« Reply #2 on: 06 April 2020, 17:09:39 »
Don't pay masses of attention to the belt markings, they are probably wrong.

The belt should be tight everywhere.

Does the DVD say do it clockwise?  I must look at it again, as I've always done it anticlockwise  :-[
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Re: Timing belt issue
« Reply #3 on: 06 April 2020, 17:13:54 »
Quote from: TheBoy on 06 April 2020, 17:09:39
Don't pay masses of attention to the belt markings, they are probably wrong.

The belt should be tight everywhere.

Does the DVD say do it clockwise?  I must look at it again, as I've always done it anticlockwise  :-[


Me to, fitted from bottom up, anti-clock,,4321. Down
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dave.h

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Re: Timing belt issue
« Reply #4 on: 06 April 2020, 17:16:21 »
Quote from: biggriffin on 06 April 2020, 17:09:36
Don't bother with the lines, once you turn it over by hand they all go to cock, they are just there to make it easier to line the pulleys up,.  If you have the locks in, and the cam wheels line up with the marks on the back plate, and your bottom pulley hits the marks, and it's tensioned, then it's fine.  Last belt I fitted had so many marks it looked like a rainbow, and none of them lined up. :o

That's good to know - but the belt just will not fit.  When it is on the crank, tensioner cams and top idler, it won't fit over the lower idler - it is tight and it I take the idler off like in the video, the belt won't let the bolt line up to replace the idler.  It's like the belt is 2 inches too short.
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Enceladus

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Re: Timing belt issue
« Reply #5 on: 06 April 2020, 17:22:19 »
As I recall the earliest cars that haven't got the modified tensioner assy are anti-clockwise, (-->MY '96?), looking from the front. Later cars with the modified tensioner go clockwise. The modified tensioner can be fitted to the earlier cars.
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TheBoy

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Re: Timing belt issue
« Reply #6 on: 06 April 2020, 17:26:32 »
What is the backplate ID (stamped in the webbing of rear of backplate) on both new and old?
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robson

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Re: Timing belt issue
« Reply #7 on: 06 April 2020, 18:02:03 »
Have you compared the length of the old belt and the new one.
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Re: Timing belt issue
« Reply #8 on: 06 April 2020, 18:33:32 »
Quote from: robson on 06 April 2020, 18:02:03
Have you compared the length of the old belt and the new one.
That's far, far too easy  ;D
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dave.h

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Re: Timing belt issue
« Reply #9 on: 06 April 2020, 19:29:43 »
Quote from: robson on 06 April 2020, 18:02:03
Have you compared the length of the old belt and the new one.

Yeah - same size! See below for further woe.....
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dave.h

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Re: Timing belt issue
« Reply #10 on: 06 April 2020, 19:35:07 »
Quote from: TheBoy on 06 April 2020, 17:26:32
What is the backplate ID (stamped in the webbing of rear of backplate) on both new and old?

I am about to shoot myself.  Got the belt on finally, arrows in the right direction, marks lined up.  Followed the video and pre set the idlers as told, set the tension as in the video.

Came to turn the motor over by hand to do the rest of the checks and …………..the fkin belt slipped.

I guess now I have to take it all off again, set the cams up (as they are now out of line) starting with No1...then do it all over again...…..

I hate myself, I used to be good at this stuff, get an incurable illness and bang, all that stops and I can't even do a timing belt anymore.

Is there anything special I need to do to get everything in alignment now?
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dave.h

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Re: Timing belt issue
« Reply #11 on: 06 April 2020, 19:44:17 »
Quote from: TheBoy on 06 April 2020, 17:26:32
What is the backplate ID (stamped in the webbing of rear of backplate) on both new and old?

Both say 01
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Doctor Gollum

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Re: Timing belt issue
« Reply #12 on: 06 April 2020, 19:50:50 »
Wind the crank back 60°, then reset the cams and lock them, then reset the crank to tdc and refit the belt. Use a mirror and a wedge to locate and secure the belt on the run from the crank to the tensioner :y
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dave.h

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Re: Timing belt issue
« Reply #13 on: 06 April 2020, 19:59:38 »
Quote from: Doctor Gollum on 06 April 2020, 19:50:50
Wind the crank back 60°, then reset the cams and lock them, then reset the crank to tdc and refit the belt. Use a mirror and a wedge to locate and secure the belt on the run from the crank to the tensioner :y

Thank you very much, I appreciate the help.

This has to be the most helpful forum I have ever been a member of. Good job too as I seem to have turned into Frank Spencer.
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Re: Timing belt issue
« Reply #14 on: 06 April 2020, 20:02:15 »
That was from memory, but you get the gist ;)
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