Omega Owners Forum
Omega Help Area => Omega General Help => Topic started by: kaseytea on 02 January 2014, 21:11:39
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Having managed to get home with no power steering and no charge or water pump I discovered that the fanbelt had not broken but the crankshaft pulley had disintegrated into two parts . How do I remove the old one and replace it?
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Having managed to get home with no power steering and no charge or water pump I discovered that the fanbelt had not broken but the crankshaft pulley had disintegrated into two parts . How do I remove the old one and replace it?
I hope you didn't drive it very far with no water pump :o A recipe for over heating and possibly warping heads.
The pulley outer is held to the inner by half a dozen M8 Torx headed bolts. Undo & replace ;) Bear in mind that they are not all equally spaced ;)
And welcome to the forum :y :y
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Having managed to get home with no power steering and no charge or water pump I discovered that the fanbelt had not broken but the crankshaft pulley had disintegrated into two parts . How do I remove the old one and replace it?
As Andy said ... but if you can "see" its in 2 parts. then they are both there, so probably the torx bolts just need tightening up ??? providing they are ALL still there ...... :(
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Having managed to get home with no power steering and no charge or water pump I discovered that the fanbelt had not broken but the crankshaft pulley had disintegrated into two parts . How do I remove the old one and replace it?
As Andy said ... but if you can "see" its in 2 parts. then they are both there, so probably the torx bolts just need tightening up ??? providing they are ALL still there ...... :(
It's not quite like Nige. The bit that un-bolts is actually two bits bonded together with rubber ...... harmonic damper ;) The rubber bit on kaseytea's has expired ;)
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hi thanks for replies and no I didnt overheat it I was watching temp guage all the way. However the pulley is made up of two rings with a rubber "damper" in between rubber has degraded and sheared leaving me with outer ring and inner ring no longer connected. Pulley is fixed to cam shaft with 1 large central bolt which is torqued to 150nm plus any ideas on how to remove it
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Nope pulley is attached by the six bolts around the centre bolt :y
Leave the centre bolt well alone :y
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To add, if all six smaller bolts are out, use a bigger hammer ;)
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hi thanks for replies and no I didnt overheat it I was watching temp guage all the way. However the pulley is made up of two rings with a rubber "damper" in between rubber has degraded and sheared leaving me with outer ring and inner ring no longer connected. Pulley is fixed to cam shaft with 1 large central bolt which is torqued to 150nm plus any ideas on how to remove it
As above and TaxiAl says, the outer pulley bit is held by 6 bolts to the pulley's inner.
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The crank pulley is two pieces...
1. The auxbelt pulley/harmonic balancer. The broken bit on yours, which attaches with six bolts to...
2. The cambelt crank pulley which is attached to the crank with the big single bolt.
Just to be clear :y
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Err... Engine size?
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Err... Engine size?
Does it matter? :-\ :-\
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Err... Engine size?
Does it matter? :-\ :-\
I assumed V6. Are the 4 pot petrol, 6 cylinder BMW diesel and 4 cylinder GM diesel the same?
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Hi thanks for response. I cannot find any other bolts at all . The engine is a 2.2 dti ecotec It sure looks that only one bolt secures
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Err... Engine size?
Does it matter? :-\ :-\
It would seem so :-\ I too had assumed a v6 :-[
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If you can only see one bolt, then there's only one bolt :-\
Pop the car in first and make sure that the hand brake is fully on, then attack it with a long breaker bar :y
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Probably get told off for linking to the old site but is this of any use? It mentions bolt as in singular and is a DTi.
http://oldsite.omegaowners.com//forum/YaBB.pl?num=1250619949/0
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Does the 2.2 dti have a cam belt or cam chain?
If it has a belt then I would expect that the pulley would be in two-parts to permit regular belt changes.
If it has a cam chain then the pulley probably isn't in two parts because VX didn't see a requirement for it to be removed easily.
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Dti is chain driven :y
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Err... Engine size?
Does it matter? :-\ :-\
It would seem so :-\ I too had assumed a v6 :-[
You & me too :-[ :-[
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Err... Engine size?
Does it matter? :-\ :-\
Did ask.....
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The 2.2 Dti has a single big bolt holding the pulley on.
Its bloody tight to so takes some shifting.
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Mine suffered the same fate a few months ago. The 2 pulley halves are held together by a rubber ring that acts as a vibration damper. You'd be surprised at the difference it makes... After weeks of unknown metal filings at the front of the engine bay, and head scratching, the battery charge warning light came on, the steering became heavy and the temp gauge shot through the roof, the problem became obvious. The outer pulley had separated from the inner pulley. Quite common apparently. There is no point sourcing a second hand one, as it may soon suffer the same fate...
The pulley is held on by a single centre bolt (22mm, I think...). It may be tight, so put the car into 5th gear with the handbrake on and it untightens anti clockwise with a crack bar.
If you shop around, I got a new one for £40 off a well known auction site. And travelled 8 miles to pick it up.
Check also the condition of the belt and the hydraulic tensioner that (by the way) releases with a 19mm socket.
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The rubber damper ring, by the way, is why the timing mark on the outer pulley should never be relied upon when timing the engine / timing chain up. Always use the peg where the crankshaft sensor is on the side of the engine.
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Easy being wise after the event, but...Crank pulley failure would point to the 2.2dti, as said its quite common on that engine.
There's a few mentions of the problem on here and it's often that engine.
Only v engine I remember with failed cp, was TB's rusty bullet at 170k miles.
Didn't know the Dti was a single bolt though. 150nm isn't massive , so obviously leverage is your friend. Being manual, use 5th gear? But if the hand brake fails, it might turn the engine backwards...?
Surmising, would it be possible to remove the outer of the pulley, and hold the inner with a chain wrench or stilsons, while undoing the bolt?
...is the bolt left or right hand thread...?
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Easy being wise after the event, but...Crank pulley failure would point to the 2.2dti, as said its quite common on that engine.
There's a few mentions of the problem on here and it's often that engine.
Only v engine I remember with failed cp, was TB's rusty bullet at 170k miles.
Didn't know the Dti was a single bolt though. 150nm isn't massive , so obviously leverage is your friend. Being manual, use 5th gear? But if the hand brake fails, it might turn the engine backwards...?
Surmising, would it be possible to remove the outer of the pulley, and hold the inner with a chain wrench or stilsons, while undoing the bolt?
...is the bolt left or right hand thread...?
Its a right hand thread. You could use stilsons, a large pair? The inner pulley is about 4" across, and access is awkward.
I welded the two halves together, to put me on until I sourced a replacement.
Back in the old days, One could place a socket with a extension bar placed against something solid, and 'flick' the ignition key to momentarily turn the engine on the starter, but now, in the days of freewheeling crank timing pulleys... not recommended.
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Hi guys thanks for the input . I have ordered replacement item and will advise on outcome later :)
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Ok good luck... is the belt and tensioner ok?
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Hi guys well its done . Plus gas didnt reach thread of bolt but did lubricate pulley on end of crankshaft so that once bolt was undone pulley separated easily. New pulley fitted and engine running o.k thankyou all for advice and assistance.
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You're welcome. That's what we're here for... ;)