Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: steve6367 on 29 May 2015, 20:34:54
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Completed the thermostat on the new 2.5 today and moved onto timing belt.
I am presented with the below (this is how it came, I have not taken the belt off yet.) Am I doing something stupid or has it just been mistimed by previouse owner?
What do I do now? Just take belt off and adjust cam timing?
Steve
(http://i429.photobucket.com/albums/qq19/steve6367/bae59b34de2fe6010e3179134c5b7de5_zpsvxgnlqvr.jpg)
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That's what mine looked like. I didn't find enough adjustment to get the camlocks in, so had to do it from scratch.
This is done by turning the crank backwards about 60 degrees where the valves are clear of the pistons. Then you remove the belt; fit the camlocks once you've aligned the correctly and turn the crank back so that the cranklock fits.
After all that, you follow the rest of the guide.
Expect the car to run better and the fuel economy to improve when you're done.
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Thank you - that's the mornings job then :y
Based on the history it's been like this for a long time! Will it have done any damage? How do you get it out that much in the first place?
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Thank you - that's the mornings job then :y
Based on the history it's been like this for a long time! Will it have done any damage? How do you get it out that much in the first place?
Well I don't, but not using the timing tools, or not turning it through enough times -to ensure that everything stays timed- will easily do it. Mine was covered in Tippex marks which didn't align when I started, but did when I finished.
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Sorry didn't mean you personally :y
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Will it have done any damage? How do you get it out that much in the first place?
IIRC there has been cases of timing to be out by more than a couple of teeth with no lasting damage.
It'll be out because people have best guessed in the past.
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Can I just check, once I have turned the crank anti-clockwise 60 degs I can move the cams in either direction to align? Or they must still only go clockwise?
Steve
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Can I just check, once I have turned the crank anti-clockwise 60 degs I can move the cams in either direction to align? Or they must still only go clockwise?
Steve
once the crank is moved and hopefully the pistons have followed ::) the valves will be no where near the piston crowns/tops so you can move the cams which ever way you want to without fear of them fouling the pistons :y But from the pictures you've posted, the cams aren't that far out, so they don't need moving very far.
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Fantastic thank you - I will report back in the morning :y
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From what I can see it looks to be a tooth out (but I am on my phone). Me personally would remove the whole belt and start a fresh. You wont need to turn the crank back for that much. Lock the crank with the lock, then use a torx bit on the cam sprockets to gently bring the cams into position. Then put the locks in between the cams. Make sure the other side (3 & 4) are correct too then put the cam locks in between them too. Then start the process from the crank putting the crank wedge in place to hold the belt in position, then work up and around anti clockwise, going around the idler, then cam 4, then 3, under the central idler, number 2 then 1, if you have it correct the belt should just go over the tensioner :y
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From what I can see it looks to be a tooth out (but I am on my phone). Me personally would remove the whole belt and start a fresh. You wont need to turn the crank back for that much. Lock the crank with the lock, then use a torx bit on the cam sprockets to gently bring the cams into position. Then put the locks in between the cams. Make sure the other side (3 & 4) are correct too then put the cam locks in between them too. Then start the process from the crank putting the crank wedge in place to hold the belt in position, then work up and around anti clockwise, going around the idler, then cam 4, then 3, under the central idler, number 2 then 1, if you have it correct the belt should just go over the tensioner :y
:y
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Thank you for all the help, got it timed up yesterday.
(http://i429.photobucket.com/albums/qq19/steve6367/th_2015-05-30%2011.04.37_zpsrk0trhde.jpg) (http://s429.photobucket.com/user/steve6367/media/2015-05-30%2011.04.37_zpsrk0trhde.jpg.html)
Managed to break one of the water pump pulley bolts putting it back together, but other than that went well and ran up to Luton and back without problem :y
Still not quite right on LPG under acceleration on an incline, but will keep working on that.
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That's what mine looked like. I didn't find enough adjustment to get the camlocks in, so had to do it from scratch.
This is done by turning the crank backwards about 60 degrees where the valves are clear of the pistons. Then you remove the belt; fit the camlocks once you've aligned the correctly and turn the crank back so that the cranklock fits.
After all that, you follow the rest of the guide.
Expect the car to run better and the fuel economy to improve when you're done.
Just asking; does it matter whether the crank is turned 60 degrees backwards or forwards, and, if so, why?
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That's what mine looked like. I didn't find enough adjustment to get the camlocks in, so had to do it from scratch.
This is done by turning the crank backwards about 60 degrees where the valves are clear of the pistons. Then you remove the belt; fit the camlocks once you've aligned the correctly and turn the crank back so that the cranklock fits.
After all that, you follow the rest of the guide.
Expect the car to run better and the fuel economy to improve when you're done.
Just asking; does it matter whether the crank is turned 60 degrees backwards or forwards, and, if so, why?
60 degrees backwards/anti clockwise moves all the pistons at least 1/3 down from top dead centre. (and well away from the valves)
Being a 54degree V6 means that moving it forward/clockwise does something different. I did experiment when I had the heads ff my old Omega 10 years ag but I didn't take a picture :-\
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Being a 54degree V6 means that moving it forward/clockwise does something different. I did experiment when I had the heads ff my old Omega 10 years ag but I didn't take a picture :-\
Vee angle actually doesn't make any odds as it's still an even-fire 6 cylinder engine, which means that you have a pair of pistons at TDC every 120 degrees of rotation, hence 60 degrees away from TDC in any direction is the point of maximum safety. The reason we recommend turning it back 60 degrees is that you can do it with the crank locking tool still installed and it's a simple matter just to bring it back to TDC again.