SC idler pulley bolt - need confirmation : 2000-2005 (other than GXP)

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SC idler pulley bolt - need confirmation

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harofreak00

Post subject: SC idler pulley bolt - need confirmation

Posted: Wed Feb 04, 2009 5:04 pm

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Pulley #8

Is this a normal or reverse thread? Lefty loosy/righty tighty or lefty tighty/righty loosy.

I had a pulley explode months ago, and I'm finally getting around to fixing it. I have already sheared off 2 brand new high quality T50 torx bits. I just bought a propane torch and plan to heat it up good before cranking on it.

I need to know 100% what way this bolt comes out. "I think" just isn't going to cut it. Thanks

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Last edited by harofreak00 on Wed Feb 04, 2009 5:19 pm, edited 1 time in total.

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00Beast

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Wed Feb 04, 2009 7:45 pm

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It's lefty loosy. Try some freeze off.

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harofreak00

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Wed Feb 04, 2009 7:49 pm

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I lost my light for today, I'll try tomorrow. Thanks

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olblueeyesbonne

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Wed Feb 04, 2009 9:55 pm

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That is not a regular bolt. It is a reverse thread so it will loosen by spinning to the right.
One suggestion -find a W-body and get that bolt off one of them -they have a regular bolt head to mate with a 15mm socket.

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harofreak00

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Wed Feb 04, 2009 10:03 pm

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So the torx head is reverse and the 15mm is regular?

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danthurs

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Wed Feb 04, 2009 10:04 pm

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Joined: Thu May 22, 2008 6:19 pm
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Year and Trim: 1997 Bonneville SSEi

#3 and #9 will have the same thread, #8 will be the reverse of those two. So with the tensioner being reverse thread then #8 is a normal thread.

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harofreak00

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Wed Feb 04, 2009 10:06 pm

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So its easily dictated by the belt path? Whatever way the pulley spins is the way the bolt tightens?

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danthurs

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Wed Feb 04, 2009 10:09 pm

Posts like an L36

Joined: Thu May 22, 2008 6:19 pm
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Year and Trim: 1997 Bonneville SSEi

Exactly. You don't want anything catching and unscrewing the bolt.

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harofreak00

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Wed Feb 04, 2009 10:15 pm

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*dang*, I was hoping I was turning it the right way. I'll have to use the torch.

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00Beast

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Wed Feb 04, 2009 10:31 pm

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Use the torch, get it red hot, and take a candle to the head of the bolt, and and melt some of it into the bolt. It will wick down the threads, and the wax acts like a penetrating lubricant.

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harofreak00

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Wed Feb 04, 2009 10:47 pm

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The threads are not even close to exposed like that. The head of the torx bolt is almost an 1" big. Then there is the pulley bearing with broken plastic everywhere.

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00Beast

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Wed Feb 04, 2009 10:49 pm

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Oh, nevermind then, lol.

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harofreak00

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Thu Feb 05, 2009 3:09 pm

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Got it nice and hot... then pop.. sheared the bolt off. *dang*. Now I need a new tensioner assembly.

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00Beast

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Thu Feb 05, 2009 11:57 pm

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That sucks Andrew. You don't have one off of one of your parts cars? lol

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GoldenBullet

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Fri Feb 06, 2009 12:10 am

Certified Bonneville Nut

Joined: Tue May 20, 2008 5:02 pm
Posts: 4638
Location: Minnesota
Year and Trim: 2001 GMC Yukon XL

oh that sucks, nothing like MN rust :sad:

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harofreak00

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Fri Feb 13, 2009 1:22 am

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Location: Browerville, MN
Year and Trim: 2004 GXP - plus a handful of other Bonnevilles

harofreak00 wrote:

I need to know 100% what way this bolt comes out. "I think" just isn't going to cut it. Thanks

It appears that only Marty knew what he was talking about here. I brought the tensioner assembly to my Dad's shop today to see if we could drill the old bolt out. It turns out it was reverse thread. We managed to get the bolt out, and I have a new bolt on order ($5).

Kind of frustrated with the incorrect answers I received, cost me a lot of time and energy.

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GoldenBullet

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Fri Feb 13, 2009 1:29 am

Certified Bonneville Nut

Joined: Tue May 20, 2008 5:02 pm
Posts: 4638
Location: Minnesota
Year and Trim: 2001 GMC Yukon XL

what way does the crank pulley turn, clockwise or counter-clockwise?

edit: p.s. that sucks that you broke it off due to misinformation.

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Last edited by GoldenBullet on Fri Feb 13, 2009 1:32 am, edited 1 time in total.

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harofreak00

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Fri Feb 13, 2009 1:33 am

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Year and Trim: 2004 GXP - plus a handful of other Bonnevilles

Clockwise

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golfyeti

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Tue Feb 17, 2009 7:21 pm

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Joined: Thu May 22, 2008 10:29 am
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Location: Winnipeg, Manitoba
Year and Trim: 2000 SSEi
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harofreak00 wrote:

Clockwise

Haro, too bad. If its any consolation I have never been able to remove the ilder pulley bolt (#8) no matter what amount of leverage I have put on it. I can only hope this pulley holds out. I was told that only the Tensioner pulley #3 was reverse thread, so I am a little confused now, or maybe enlighted as to why I couldn't get the idler pulley #8 to come off, because I was assuming it was a regular thread.

In fact, when getting a quote to replace the idler pulley #8 at the dealership (just for kicks) they said they don't replace that pulley -- they replace the whole assembly. I guess they can't get that bolt to let loose either.

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Last edited by golfyeti on Thu Feb 19, 2009 1:42 pm, edited 4 times in total.

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00Beast

Post subject: Re: SC idler pulley bolt - need confirmation

Posted: Tue Feb 17, 2009 7:47 pm

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I apologize for my mis-information. :bstooges:

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Portal » Board index » Mechanical and Maintenance (no chat or performance) » 2000-2005 (other than GXP)

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