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[YZ250]

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

[Andy H]

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.

[05omegav6]

Dti is chain driven

[Andy B]

Err... Engine size?

Does it matter? 

It would seem so I too had assumed a v6

You & me too   

[RobseyMV6]

Err... Engine size?

Does it matter? 

Did ask.....

[Marks DTM Calib]

The 2.2 Dti has a single big bolt holding the pulley on.

Its bloody tight to so takes some shifting.

[andymp]

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.

[andymp]

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.

[chrisgixer]

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...?

[andymp]

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.

[kaseytea]

Hi guys thanks for the input . I have ordered replacement item and will advise on outcome later

[andymp]

Ok good luck... is the belt and tensioner ok?

[kaseytea]

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.

[andymp]

You're welcome. That's what we're here for...