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Author Topic: Timing belt won't!  (Read 2358 times)

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chrisdb

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Re: Timing belt won't!
« Reply #15 on: 18 February 2009, 19:55:31 »

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top one at 12 o'clock, lower one to 3 o'clock...
There's no point in an adjuster if you set it like that. :D

Ahh.... tell me more!  ;D
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Darth Loo-knee

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Re: Timing belt won't!
« Reply #16 on: 18 February 2009, 19:57:07 »

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Your top adjuster looks to be on minimum.  Have you set it?

Yes, I set it as Mark DTM said - top one at 12 o'clock, lower one to 3 o'clock...

I think people get a bit confused with the 12 o'clock and 3 o'clock setting. This is to start off with. You then adjust accordingly.

As Mark has said the crank is not locked in position to hold in the TDC position, in which case you could be wrong altogether.
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Marks DTM Calib

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Re: Timing belt won't!
« Reply #17 on: 18 February 2009, 19:58:38 »

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top one at 12 o'clock, lower one to 3 o'clock...
There's no point in an adjuster if you set it like that. :D
Put the locks back in and set it to take out the slack.


Ah, somebody who has not grasped the details of the timing setup.

You set them to that as this is the minimal adjustment resulting in the shortest belt run.

You then move them anti-clockwise to set the timing.

Can you set the tensioner much tighter for the first setting...
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chrisdb

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Re: Timing belt won't!
« Reply #18 on: 18 February 2009, 19:59:02 »

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Your top adjuster looks to be on minimum.  Have you set it?

Yes, I set it as Mark DTM said - top one at 12 o'clock, lower one to 3 o'clock...

I think people get a bit confused with the 12 o'clock and 3 o'clock setting. This is to start off with. You then adjust accordingly.

As Mark has said the crank is not locked in position to hold in the TDC position, in which case you could be wrong altogether.

But it was locked... I only just removed it because I'm at the point now where I need to turn the crank over  :)
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Marks DTM Calib

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Re: Timing belt won't!
« Reply #19 on: 18 February 2009, 20:00:11 »

Ok, so set the tensioner much tighter, a good 15mm past the mark for the first setup
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Darth Loo-knee

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Re: Timing belt won't!
« Reply #20 on: 18 February 2009, 20:01:30 »

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The crank lock should be fitted for a start!

We dont know if the crank is at TDC!

Oh, sorry, I had just removed it. I had it 60 btdc while I was setting the cams in place, then I put it on and locked it on tdc, and then removed it after I torqued the bolts - 40nm for the rollers and 20 for the tensioner nut. Incidently, the tensioner has always moved a long way out after turning the crank, even though tightened to 20nm...

So did you when the old cambelt was on, turn the crank until the cams were nearly in place, then put on the crank locking tool, turn the crank a little more to lock it to the water pump? then look if the cams were lined up properly? if they were then put in the cam locks? If not line up the cams first?
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Marks DTM Calib

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Re: Timing belt won't!
« Reply #21 on: 18 February 2009, 20:03:31 »

The initial cam alignment looks fine.

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chrisdb

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Re: Timing belt won't!
« Reply #22 on: 18 February 2009, 21:04:38 »

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Ok, so set the tensioner much tighter, a good 15mm past the mark for the first setup

YIPEE !! Setting the tensioner much higher seems to have done the trick. The timing did not move too far out after the first 720 and I was able to adjust it after fe few more rotations till it's now spot on.

I'm scared to reset the tension though - it's all the way to the left most stop. Will it throw things out if I set it back to the 4mm mark?
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Marks DTM Calib

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Re: Timing belt won't!
« Reply #23 on: 18 February 2009, 21:06:53 »

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Ok, so set the tensioner much tighter, a good 15mm past the mark for the first setup

YIPEE !! Setting the tensioner much higher seems to have done the trick. The timing did not move too far out after the first 720 and I was able to adjust it after fe few more rotations till it's now spot on.

I'm scared to reset the tension though - it's all the way to the left most stop. Will it throw things out if I set it back to the 4mm mark?

Nope, the trick is to set the tension high for the first adjustment so it can take up the belt slack.....having set the cams and rotated the engine, the tension can then be reset properly without any affect on the timing
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chrisdb

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Re: Timing belt won't!
« Reply #24 on: 18 February 2009, 21:09:08 »

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Ok, so set the tensioner much tighter, a good 15mm past the mark for the first setup

YIPEE !! Setting the tensioner much higher seems to have done the trick. The timing did not move too far out after the first 720 and I was able to adjust it after fe few more rotations till it's now spot on.

I'm scared to reset the tension though - it's all the way to the left most stop. Will it throw things out if I set it back to the 4mm mark?

Nope, the trick is to set the tension high for the first adjustment so it can take up the belt slack.....having set the cams and rotated the engine, the tension can then be reset properly without any affect on the timing

Cheers, thank you very much - I might even get finished in time for work tomorrow  ;D
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