I have one more thing to mount to the front of my engine before I can try fitting belts and that is the pulley that goes to the right of the water pump and above the A/C compressor:
So my question is, since the bolt that holds it on is smaller than the hole in the bearing, how do I attach the pulley without any play? How have you guys done this?
Thanks, Rick
[This message has been edited by GT (edited 12-11-2005).]
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12:16 AM
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jeffndebrus Member
Posts: 2772 From: Jacksonville, Fl- usa Registered: Aug 2001
Mickey_Moose Member Posts: 1301 From: Edmonton, AB, Canada Registered: MAY 2001 posted 08-26-2004 11:10 AM -------------------------------------------------------------------------------- I used the larger Dayco pt.#89009 pulley and installed a bushing inside of the bearing on the pulley. I couldn't seem the get a belt to fit with the tension I liked with the smaller pulley (seemed to need a 80.25" belt - which does not exist). I made a short standoff to get the spacing right for the belt to align and track (next time I will just machine a standoff with the 'bushing' attached to it). I also modified (ground the top off slightly) one of the water pump bolts for a bit more clearance with the belt.
I kinda cheated, I still had the caddy tensioner that everyone tosses out. So I used the new pulley, but cut the core guts out the caddy tensioner assemblys pulley. Those worked great for the new core.
As seen in the pic.
------------------ 85GT 5spd MSD Everything,4.9 With Nitrous. www.captfiero.com
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01:56 AM
GT Member
Posts: 911 From: Silver Spring, MD USA Registered: May 2003
Jeff- Kewl, thanks. I have been using Mickey_Moose's post as my template and I have the Dayco 89009 pulley, I just didn't know I had to bush it. Where does one buy a bushing?
Cap'n- BLAST! And I just hauled that PS pump/tensioner to the dump after having it litter my driveway for almost a year!
-Rick
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08:22 AM
Mickey_Moose Member
Posts: 7497 From: Edmonton, AB, Canada Registered: May 2001
You may be able to find a correct size bolt that may fit the pulley/thread combo (I have seen bolts with the wider shoulder on them and many different cars - if they fit I have no ideal). You could try a wreckers and look through the different cars for idler bolts.
I used a bushing on mine as I just happened to find one at work that fit. Where it came from I have no ideal, but shoot me an email and I can take measurements off the bushing. Anyplace that rebuilds electric motors 'might' be able to help you out with the bushing (or you could just take the pulley and bolt and see if they can fit something for you). The other option is to find a piece of copper with the correct OD as the ID of the pulley and have it drilled out to the size of the bolt.
The stand off is 15.5 mm high and was made out of some round steel stock, the center hole was drilled out on a lathe. The large washer on the bolt came from an idler pulley off a car at the wreckers (sorry I didn't take notice of the type of car it was).
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01:16 PM
jscott1 Member
Posts: 21676 From: Houston, TX , USA Registered: Dec 2001
A lot of times the bushings come with the idler. I had all three of my idlers go bad and I went down to the autozone and went through the inventory until I found three that would fit. Some came with bushings and some didn't.
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Capt Fiero Member
Posts: 7657 From: British Columbia, Canada Registered: Feb 2000
The flat thing with the threads, is what I cut out of the caddy tensioner.
Maybe it will help someone else later on. The bolt is I think a spare 2.8 lower intake bolt. The threaded brass made a great spacer. I used thin washers as alignment spacers get the exact correct spacing for the belt.
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01:59 PM
GT Member
Posts: 911 From: Silver Spring, MD USA Registered: May 2003
Wow, thanks for all the advice and pictures. That helps a lot. I'll scour the local Home Depot, U-Pull-It yard, and auto parts places.
Do you guys find that the pulley spins on it's own bearings or does the bushing turn on the bolt? I guess the key is to tighten the bolt against the center of the pulley, thereby securing the bushing so it doesn't turn?
-Rick
[This message has been edited by GT (edited 12-11-2005).]
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06:26 PM
Capt Fiero Member
Posts: 7657 From: British Columbia, Canada Registered: Feb 2000
and now for something different!! take one of the bolt/studs from the lifting arms and insert it backwards into the bearing washer and nut hold it centered try it just might work for you too!! clynt
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11:38 PM
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Dec 12th, 2005
Mickey_Moose Member
Posts: 7497 From: Edmonton, AB, Canada Registered: May 2001
The bushing I used on mine had to be 'pressed' into the bearing, so it is snug fit - thus the pulley turns on the bearing. I am also running the a/c compressor on mine so my bolt goes through the front side and into the one a/c bracket.
I like Capt's method (without the a/c compressor), nice custom look to finishing off the face of the bearing - I would however grind the top down flat and maybe polish it up a bit
Capt - looks like you got the belt going around the water pump the wrong way in that picture
quote
Originally posted by hellbentkrusty: take one of the bolt/studs from the lifting arms and insert it backwards into the bearing washer and nut hold it centered try it just might work for you too!! clynt
- I would worry about the pulley slipping on the bolt, I can see the belt pulling the pulley off center. It will work for a little while, but I would not trust this method as a long term solution. You need to fill the hole of the bearing to prevent any side-to-side movement that will occur. There is no way that you can tighten the nut/bolt in such a way that friction alone will hold it in place (unless you friction weld them together, but that will damage the bearing).
Tim
[This message has been edited by Mickey_Moose (edited 12-12-2005).]
Thanks for the idea Clynt. Do you have any photos?
I'm wondering if it will work on mine because I am using the A/C compressor and there is a support that goes from the front of the compressor to the back of the screw where we propose to put our pullies. The support is threaded so I don't know if you idea can work with A/C. You can see the support in the second picture I posted in this thread.
-Rick
[This message has been edited by GT (edited 12-12-2005).]
You may have yours completely together now. But for others following this thread, you can buy a bolt that will fit this pulley from a GM dealer. I bought mine for $3.95 and fits perfect. I didn't take a picture of it. Next time I have the 4.9 out, I will pull the bolt and snap a picture (which will be soon as I have to replace my transmission
Here's the info:
17mm bolt for pulley:
GM part number: GM24501175
name: F-bolt/screw
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03:56 PM
GT Member
Posts: 911 From: Silver Spring, MD USA Registered: May 2003
