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installing underdrive pulley

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Old 12-15-2004, 07:43 PM
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Default installing underdrive pulley

i see it says to measure how far its gone in? can you just put the pulley on and tighten to 240 ftlbs back it out and then re tighten to 37 ft lbs and then do the 140* turn after that?

should this all be done wiht the new bolt or not until the 37 ftlb part? thanks
Old 12-15-2004, 10:45 PM
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Originally Posted by WS6FirebirdTA00
i see it says to measure how far its gone in? can you just put the pulley on and tighten to 240 ftlbs back it out and then re tighten to 37 ft lbs and then do the 140* turn after that?

should this all be done wiht the new bolt or not until the 37 ftlb part? thanks
I used a special bolt to get the pulley most of the way on. Then I used the old factory bolt and tightened to 240 ft lbs then removed it. Installed the brand new factory bolt torqued to 37 ft lbs then turned it an additional 140* after that. This is the best way to do it.
Old 12-15-2004, 10:59 PM
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what kinda special bolt?
Old 12-15-2004, 11:06 PM
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Originally Posted by WS6FirebirdTA00
what kinda special bolt?
A 6 inch piece of all thread with a big washer & nut.

http://img.photobucket.com/albums/v4...4/000_1007.jpg

http://img.photobucket.com/albums/v4...4/000_0990.jpg
Old 12-15-2004, 11:13 PM
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where can i get it and what size is it?
Old 12-15-2004, 11:21 PM
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put your pulley in the oven untill its so hot you have to use oven mitts, it should slide right on. if it doesnt, you're no worse off than when you started. make sure the inside of the pulley and the outside of the crank is nice and clean first
Old 12-15-2004, 11:22 PM
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Originally Posted by WS6FirebirdTA00
where can i get it and what size is it?
It's a m16 X 2.0 pitch. I couldn't find any less the 3 ft long so I made 6 of them. I have sold some of them $15.00 shipped, if you want one pm me. I have heard some some of the guys saying they heat the pulley to 200 degrees, and slide them on by hand. But the bolt worked good for me. Let me know.
Old 12-15-2004, 11:53 PM
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iff 200 degrees works, 400 should work twice as good

i heated the axle bearing carrier from my 4 wheeler to about 500 degrees (forgot it was in the oven) and the bearings went in the freezer. they would go in so easily, that i couldnt get one side to stay in so i could put the other side in lol. one kept falling out while i put the other in.
Old 12-16-2004, 06:13 AM
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i have the parch pully, with that being fluid dampened would there be a problem heating to 200? i might shoot you a pm about that bolt
Old 12-16-2004, 02:05 PM
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yup toss that thing in the oven. thats how ive done it on a few cars. just make sure to garnish with a little lube hehehe
Old 12-16-2004, 04:15 PM
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so just put it in the oven at about 200 deg and then put some oil on the end and it should slide on? and then torque it in with the old bolt and then properly torque with new one?
Old 12-17-2004, 03:57 PM
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My March pulley instructions say to put 30WT oil on the crank snub and inside the pulley.
Old 12-17-2004, 04:20 PM
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ok thanks, i didnt see that but ill go back and look. was i right iwth the other stuff though on how to do it?
Old 12-17-2004, 04:26 PM
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Yes on your other stuff, although I would call the vendor you bought it from to ask about heating the liquid. Or maybe someone else will pop in with an opinion on the fluid. I don't plan on heating mine up next spring when it goes on.
Old 12-19-2004, 10:31 AM
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i bet i can just use a heat gun on the base of it...you think that woudl do it?




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