156 2.4 JTD Drive belt change HELP! - Alfa Romeo Forum
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Old 04-01-14
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Hmmm 156 2.4 JTD Drive belt change HELP!

Hi,

I have a 156 2.4 JTD 10v. I want to change the auxiliary drive belt. Was following a guide on Alfa Workshop which says "Using a spanner on the bolt in the middle of the auxiliary belt tensioner move the tensioner anti clockwise then slip the belt of the pulley".

Can someone confirm wether this should work like a spring loaded tensioner? It has a 17mm size bolt in the middle of the pulley which just undoes when I try and turn it anti-clock wise, what am I doing wrong?

Here is a photo

Linky Link

Thanks

Last edited by benny147; 04-05-14 at 00:14.
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Old 04-01-14
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Undo the bolt holding the tensioner. Then turn the tensioner anti-clockwise. The hole in the tensioner that the bolt passes through is not central so when you spin the tensioner anti clockwise it acts like a cam. I used a pin spanner in the two small holes in the tensioner to re-tension.

Hope this helps.
Steve.
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Old 04-01-14
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In your picture, top center you can see a hex bolt, the large hex on the outide of that, hidden by dirt in that pic, is the one you should be turning, it's a 32mm.
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Old 04-01-14
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Main tensioner on my 02 2.4jtd requires a 32mm spanner from below to slacken, then I hold the spanner tensioner with cable ties till I fit the belt. There is also a pulley which is eccentric higher up which needs to be loosened. 32mm spanner from Halfords was £12.
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Old 05-01-14
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Changed the belt today

Cleaned all the dirt off of the 32mm and it was pretty obvious from there. Thanks for the help guys!
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Old 09-01-14
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So, 3 days on the tensioner decides to collapse.

Exciting...
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Old 09-01-14
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Mmmm.
There is a procedure for setting the correct tension on the auto tensioner.
You use the fixed tensioner that my original post refers to and includes the use of a pin in the auto tensioner.
Very few people fit the auto tensioner correctly.
Steve.
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Old 09-01-14
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Found where you put the pin to set the auto tensioner, thanks.

We took the tensioner off this evening to find that the bolt in the middle of the 32mm has clearly been snapped for a number of years. No clean breaks, was very rusty and the previous belt was 5mm shorted, so this must have been holding it all together!

Managed to get the snapped bolt out of the block, luckily there was a good 3-4mm sticking out. Hammered a 9mm spanner onto it and then used a socket Came out with no fuss.
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Old 10-01-14
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Good stuff, you can have the bolt from my old tensioner if you want.
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Old 10-01-14
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Thanks for the offer Simon. I'm going to get a new one today though.
Was lucky to get it out, don't want it to snap again!
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Old 22-01-14
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does anyone have the link for steps to fit/change the auxiliary belt on a 2.4L JTD,

I'm assuming the 2.4's on the 156 are the same engine as the 2.4L 159?

thanks
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