Fan Belt Size
#1
Posted 12 April 2021 - 08:01 AM
Long story short my fan belt snapped yesterday, the AA bodged a belt on but I need the correct length.
998 A plus manual transmission. I'm unsure of pulley sizes that are on the car.
Many thanks
Cal
#2
Posted 12 April 2021 - 08:08 AM
Did you manage to save the old one - it'll be marked or you can measure it. Or you could wrap some string/rope/wire around the pulleys and measure that.
Failing that, put up a pic of your water pump pulley, but its probably a GCB10838 you need.
Edited by GraemeC, 12 April 2021 - 08:09 AM.
#3
Posted 12 April 2021 - 08:20 AM
#4
Posted 12 April 2021 - 08:25 AM
Was it "cogged" or smooth? There may be witness marks on the pulley if you're not sure.
You should be able to get the 825mm belt to fit, even if you have to unbolt the alternator to thread it on.
#5
Posted 12 April 2021 - 08:29 AM
Was it "cogged" or smooth? There may be witness marks on the pulley if your not sure.
You should be able to get the 825mm belt to fit, even if you have to unbolt the alternator to thread it on.
It was a cogged belt but they were almost smooth
#6
Posted 12 April 2021 - 09:19 AM
IMG_20210412_093526 by Calum Michie, on Flickr
#7
Posted 12 April 2021 - 09:37 AM
That looks to be one of the smaller ones, most likely CAM116
Edited by GraemeC, 12 April 2021 - 09:37 AM.
#8
Posted 12 April 2021 - 01:39 PM
#9
Posted 12 April 2021 - 01:54 PM
Best to measure it to be sure.
Get a piece of washing line and put it in the place the fan belt goes and pull it tight around the pulleys. Set the alternator about mid-way of its available travel. The correct fan belt length is the length of the rope from beginning to where it meets in mm.
Edited by Cooperman, 12 April 2021 - 09:04 PM.
#10
Posted 12 April 2021 - 04:21 PM
#11
Posted 12 April 2021 - 05:19 PM
"CAM6239 pulley 3.875" wide and CAM6408 pulley used from A plus onwards is 4.75"wide."
So measure your fan pulley. Select either 825 or 838. Belt to suit.
#12
Posted 13 April 2021 - 08:31 AM
#13
Posted 13 April 2021 - 09:16 AM
#14
Posted 13 April 2021 - 09:46 AM
Most (all?) modern cars using rubber belts have tensioners
#15
Posted 13 April 2021 - 10:09 AM
I don't think belts stretch as much as deform so they sit further in the V - modern cars tend to use tooth or multi grove belts, they need less bearing stressing tension too.
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