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Author Topic: Refitting cams - getting the timing into position  (Read 1325 times)

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Martin_1962

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Refitting cams - getting the timing into position
« on: 23 May 2009, 21:53:56 »

Basically - how do I do it please?
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TheBoy

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Re: Refitting cams - getting the timing into position
« Reply #1 on: 23 May 2009, 22:07:08 »

crank in the safe position (60degrees or whatever).

Then put both cams on one bank to match markings on back plate, then pop in lock. Same for other bank.  Then set crank to tdc, and pop belt on
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Kevin Wood

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Re: Refitting cams - getting the timing into position
« Reply #2 on: 23 May 2009, 22:13:20 »

.. if you've got the pullies off, set cams to the approximate locations shown here when fitting them : http://www.omegaowners.com/forum/YaBB.pl?num=1152565319
With crank at a safe position (fit the heads and cams with the crank at 30 degs BTDC No.1).

Tighten down the bearing caps, fit the back plate and the pullies, then turn them to match the timing markings, lock them in place, rotate crank to TDC on no.1 (by rotating clockwise through 30 degs only!) and fit cam belt as normal.

Kevin
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Andy B

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Re: Refitting cams - getting the timing into position
« Reply #3 on: 23 May 2009, 22:19:27 »

Quote
Basically - how do I do it please?

I hope you don't need this car for work next Tuesday morning!  ;D  ;D  ;D
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Darth Loo-knee

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Re: Refitting cams - getting the timing into position
« Reply #4 on: 23 May 2009, 22:24:50 »

Quote
.. if you've got the pullies off, set cams to the approximate locations shown here when fitting them : http://www.omegaowners.com/forum/YaBB.pl?num=1152565319
With crank at a safe position (fit the heads and cams with the crank at 30 degs BTDC No.1).

Tighten down the bearing caps, fit the back plate and the pullies, then turn them to match the timing markings, lock them in place, rotate crank to TDC on no.1 (by rotating clockwise through 30 degs only!) and fit cam belt as normal.

Kevin

Pretty sure its 60 degrees BTDC Kev :-?
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Kevin Wood

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Re: Refitting cams - getting the timing into position
« Reply #5 on: 23 May 2009, 22:32:55 »

Quote
Quote
.. if you've got the pullies off, set cams to the approximate locations shown here when fitting them : http://www.omegaowners.com/forum/YaBB.pl?num=1152565319
With crank at a safe position (fit the heads and cams with the crank at 30 degs BTDC No.1).

Tighten down the bearing caps, fit the back plate and the pullies, then turn them to match the timing markings, lock them in place, rotate crank to TDC on no.1 (by rotating clockwise through 30 degs only!) and fit cam belt as normal.

Kevin

Pretty sure its 60 degrees BTDC Kev :-?

60 does give you more clearance.  :y

Kevin
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Martin_1962

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Re: Refitting cams - getting the timing into position
« Reply #6 on: 23 May 2009, 22:36:21 »

Quote
Quote
Basically - how do I do it please?

I hope you don't need this car for work next Tuesday morning!  ;D  ;D  ;D

Want Monday - Need Friday
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Martin_1962

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Re: Refitting cams - getting the timing into position
« Reply #7 on: 23 May 2009, 22:40:27 »

Thanks for the advice - this is the biggest engine rebuild I have ever done - I have rebuilt 4 cylinders and bike engines singles & twins.

And it is hard work!
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Darth Loo-knee

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Re: Refitting cams - getting the timing into position
« Reply #8 on: 23 May 2009, 22:46:46 »

Back aching  :-[
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Martin_1962

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Re: Refitting cams - getting the timing into position
« Reply #9 on: 23 May 2009, 23:11:37 »

Quote
Back aching  :-[


A lot :(, holding up better than it did though - but a good reminder that I am still not fully recovered
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Martin_1962

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Re: Refitting cams - getting the timing into position
« Reply #10 on: 24 May 2009, 08:01:58 »

Taking some ibuprofen now :(
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Martin_1962

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Re: Refitting cams - getting the timing into position
« Reply #11 on: 24 May 2009, 21:38:27 »

Followed that - 3 & 4 are OK, 1 & 2 are pointing out rather than in.
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Martin_1962

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Re: Refitting cams - getting the timing into position
« Reply #12 on: 24 May 2009, 22:43:21 »

Try this

Page says
.o...o................o
1.....2........3.....4
...............o......

I get
o........o.............o
.1.....2........3.....4
...............o......

Is this to be expected?
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Kevin Wood

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Re: Refitting cams - getting the timing into position
« Reply #13 on: 25 May 2009, 10:21:46 »

As long as you're sure you got cams 1 and 2 the right way round (i.e. inlet and exhaust not swapped) I would say it's OK. That guide is just a general aid to getting them roughly right before putting the pullies on. The tension in the valve springs tends to make the cam sit where it wants. ;)

Once you've got the pullies and backplate on, with the crank in a "safe" position, you can get them correctly aligned and lock them.

Kevin
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espen22

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Re: Refitting cams - getting the timing into position
« Reply #14 on: 25 May 2009, 22:23:10 »

Quote
Try this

Page says
.o...o................o
1.....2........3.....4
...............o......

I get
o........o.............o
.1.....2........3.....4
...............o......

Is this to be expected?
Sent you an pdf illustration of that, mabye it helps you.
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