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Belt whistling

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16 Mar 2016 22:15 #163855 by facade
Replied by facade on topic Belt whistling

maverick wrote:

facade wrote: The fan belt will feed in through the fan blades as you rotate the fan by hand.


Not on mine s the P/S Belt is in front of the Fan Belt, so you have to undo the P/S Belt Tensioner, get the P/S Belt Off ...

When mine failed on a recent off-road trip, we took radiator out, replaced both belts and reassembled in around 45mins.


Sorry, I kind of assumed you would take the PS belt off first- that does come off easy ;) . The barrier to fitting the fan belt is it has to go over the fan, which it will do if you feed it in through the blades, rotate the fan and then flip it back out.

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)

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16 Mar 2016 22:26 - 16 Mar 2016 22:28 #163856 by facade
Replied by facade on topic Belt whistling

emu88 wrote:
With regards to the alternator belt, is it supposed to be the larger of the two? Motor factors gave me Gates 4PK948 but it is considerably bigger than the one currently on the alternator. The PS belt I have is 4PK833 and this seems a tiny bit smaller than the old one which I guess is expected as it hasn't stretched. So do I have the wrong alternator belt?



I think I am looking entirely at the wrong thing, but the only tensioner I have is the one I removed from behind the fan.


Your tensioner is from the twin cam engine. That bearing is for the single cam type.

It is possible to change the bearing on the twin cam type, but I doubt if yours is gone. They do rattle side to side with your fingers as they are single row race. The bearing you want is larger and much more expensive.

The fan belt is 4pk830 or 4pk835/4pk836. The 4pk830 will go on, but you will have to turn the crank and work it on.
The PS belt is 4pk 850.
Stick a 10mm hex key in the hole in the tensioner, tension the belt by turning the key, and lock the two bolts, the one in the quadrant first, and then the pivot bolt.

If it suddenly breaks, go back to the last thing that you did before it broke and start looking there :)
Last edit: 16 Mar 2016 22:28 by facade.

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17 Mar 2016 08:52 - 17 Mar 2016 09:00 #163863 by emu88
Replied by emu88 on topic Belt whistling

facade wrote:

emu88 wrote:
With regards to the alternator belt, is it supposed to be the larger of the two? Motor factors gave me Gates 4PK948 but it is considerably bigger than the one currently on the alternator. The PS belt I have is 4PK833 and this seems a tiny bit smaller than the old one which I guess is expected as it hasn't stretched. So do I have the wrong alternator belt?



I think I am looking entirely at the wrong thing, but the only tensioner I have is the one I removed from behind the fan.


Your tensioner is from the twin cam engine. That bearing is for the single cam type.

It is possible to change the bearing on the twin cam type, but I doubt if yours is gone. They do rattle side to side with your fingers as they are single row race. The bearing you want is larger and much more expensive.

The fan belt is 4pk830 or 4pk835/4pk836. The 4pk830 will go on, but you will have to turn the crank and work it on.
The PS belt is 4pk 850.
Stick a 10mm hex key in the hole in the tensioner, tension the belt by turning the key, and lock the two bolts, the one in the quadrant first, and then the pivot bolt.

Thanks a lot. I assume I tighten the tensioner once both belts are on, how do I know it's tight/loose enough? And do I have to return the alternator roughly to it's former position once the new belt is on?

Just so I get my terminology right, the PS belt is the one on the RIGHT as you look at the engine from the front, and the fan/alternator belt is the one on the LEFT, yes?

So are BOTH my belts wrong? I was going to put on 4PK833 on the right side and 4PK948 on the left.

I'll return both and just get the belts off eurocarparts - they are continental ones but I have no idea which ones from this list to get! www.eurocarparts.com/car-drive-belt number plate:CK04RVT
Last edit: 17 Mar 2016 09:00 by emu88.

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17 Mar 2016 09:05 #163864 by Busta
Replied by Busta on topic Belt whistling
The number bit of the belts part number is the length, so your 4PK 833(mm) belt will fit ok for the fan and alternator (left hand side) but the 948(mm) belt won't fit anywhere.

Sometimes the tensioners can make strange whooshing and whistling noises as the bearings dry out, so replacing the bearing might fix your problem. But the tensioner is easy to get to when everything is back together so might be worth re-fitting your one and only replacing it if the problem persists. The bearing is an industry standard size and will be available from your local bearing retailer, so it's not hard to get hold of.

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17 Mar 2016 09:11 #163865 by Busta
Replied by Busta on topic Belt whistling
The power steering belt is tightened using the tensioner and the method Facade described earlier. The alternator belt is tensioned by moving the alternator (with all the bolts slightly loose), and then clamping the bolt that runs along the slotted bar before tigtening up the other 2. The layman's rule for getting the correct tension is that, once tight, you should only be able to twist the longest side of the belt 90* between your thumb and first finger.

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17 Mar 2016 09:27 #163866 by emu88
Replied by emu88 on topic Belt whistling
Thanks a lot!! So I need to go and get a 4PK850 for the PS belt ASAP.

OK regarding the tensioner potentially being the whistler.

So do I have to aim to get the tension so I can go up to 90 degrees but roughly no more or less? And by twist it, I assume you mean like this:

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