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The mkiv Supra Owners Club

my pulley tensioner has seized up ! :(


supra_aero

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I don't think you'd be able to move the tensioner arm by hand, not without using a ratchet or breaker bar as a torque multiplier: the spring's too strong. Try putting a socket and long ratchet on the pulley wheel, and turn clockwise. You should find the arm then moves clockwise.

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The belt we're talking about is the auxiliary belt, not the timing belt. The timing belt has meaty teeth in it, the aux belt has small grooves running along its length. you can't see any part of the timing belt unless you take some covers off of the engine.

 

It sounds like you just need to replace the bearings in the tensioner pulley. You probably don't need to replace the tensioner arm itself (which no doubt cost £££).

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ahh thanks Stevie. Price has come down a bit then :D

 

AA man said Cambelt/timing belt which is what threw me - I thought it was internal too! Thanks alot !

 

That's a little worrying if he didn't know the difference.

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It looks to me like the bearing has failed in the wheel hence the funny angle and the 2 shiny areas where it's touched

 

either that or also the center 14mm bolt that goes through the middle of the bearing into the tentioner may also be damaged? it threads into alloy and they are very easy to cross thread so i would check it before you try and change the wheel only.

personally, i would change the tentioner too.... i got your pm btw aero.... i have used tentioners in, belts in stock and the tentioners have new bearings in them. if you get stuck just let me know

 

but take the pulley off first and inspect the thread which it goes into...if thats goosed, then you need a new tentioner

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Can I buy your old pulley wheel off you if it isn't bent? The pressed steel wheel is very thin, the forces involved when the bearing seized *MAY* have deformed it, but if not I will buy it off you! So take it off carefully, you just undo the 14 mm socket sized bolt holding it to the arm. Don't lose the captive nut on the other side of the arm!. Good luck. Cheers.

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