Timing Belt Roller dimensions
05-08-2005, 01:50 PM
#1
or Sam O
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Timing Belt Roller dimensions
It's time for me to change my timing belt. I'm relplacing all the rollers and I am wondering what sizes i need for an 87 NA 944. I would find out myself by checking the car but, it is my daily driver and I can't afford to have it down while I wait for the parts. Thanks.
05-08-2005, 04:55 PM
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Three Wheelin'
05-08-2005, 05:59 PM
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there's no "sizes" per se, they're just what they are. you need a timing tensioner roller, an timing idler roller, a balance tensioner roller, and a balance idler roller. i would also suggest replacing the waterpump if it has not been done recently. if you call paragon or any of the other online places they'll make sure you get the right parts.
05-08-2005, 09:53 PM
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or Sam O
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What's the difference betweent the old and updated water pumps? I was thinking about buying a refurbished updated pump. thanks for the help.
05-08-2005, 10:15 PM
#6
Here's some general information on part numbers, etc:
http://www.clarks-garage.com/shop-manual/eng-04.htm
You could tell which water pump you have by taking the belt covers off (maybe the upper one is enough to see) and looking at the water pump to see if there is a belt guard. The belt guard is the shiny piece of metal above below step 3 in the balance shaft tensioning procedure here:
http://www.clarks-garage.com/shop-manual/eng-10.htm
If you are going from the old to updated water pump, you will need the update kit which includes the belt guard, you have to order the updated roller, and you have to modify the back (inside) timing belt cover. Zims sells the update kit (www.allzim.com), other vendors should as well.
http://www.clarks-garage.com/shop-manual/eng-04.htm
You could tell which water pump you have by taking the belt covers off (maybe the upper one is enough to see) and looking at the water pump to see if there is a belt guard. The belt guard is the shiny piece of metal above below step 3 in the balance shaft tensioning procedure here:
http://www.clarks-garage.com/shop-manual/eng-10.htm
If you are going from the old to updated water pump, you will need the update kit which includes the belt guard, you have to order the updated roller, and you have to modify the back (inside) timing belt cover. Zims sells the update kit (www.allzim.com), other vendors should as well.
05-10-2005, 08:05 PM
#7
or Sam O
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I was also wondering if i need all the special tools recommened to change my Timing belt, or if i can make do with the tenisioner gage and garage tools?
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05-10-2005, 09:27 PM
#10
I would recommend you change to the updated pump since the belt guard that goes with it does give your timing belt a better chance of surviving should it get too loose. Otherwise it's eay for opposing faces of the belt (with the teeth) to come in contact and shear each other off. And you know what that means.... As for tools, I don't think you can beat what this guy offers
http://www.arnnworx.com/
http://www.arnnworx.com/