M45 Kit Idler pulley - Boost Forum

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M45 Kit Idler pulley
Wednesday, February 24, 2010 4:27 PM
The pulley itself is worn around the bearing and I cannot find a replacement bearing 0.5-1mm larger then stock to make it fit. Anyone know of a replacement? I've been to multiple auto stores and none seem to have one small enough. I searched and came up empty.


Heavy ass N-body

Re: M45 Kit Idler pulley
Wednesday, February 24, 2010 7:31 PM
I used to have the number.

Its on there somewhere.

There is a bearing that is as wide as the belt, and as tall as the stock pulley.

That's what I used both times.

I also thing a idler pulley off of a 91-95 4.3 vin W vortec would work.

Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Re: M45 Kit Idler pulley
Wednesday, February 24, 2010 8:23 PM
I am interested in this too, Its the idler off the 91-95 4.3 an exact match?



Re: M45 Kit Idler pulley
Thursday, February 25, 2010 10:42 AM
I also need one and couldnt find it. I ended up welding it back together, we will see how long it lasts.
Re: M45 Kit Idler pulley
Friday, February 26, 2010 10:34 AM
Buy one and find out......

what Am\did I plow the way for some of you?

Try it and see.

Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Re: M45 Kit Idler pulley
Friday, February 26, 2010 12:42 PM
Taetsch Z-24 wrote:

I used to have the number.

Its on there somewhere.

There is a bearing that is as wide as the belt, and as tall as the stock pulley.

That's what I used both times.

I also thing a idler pulley off of a 91-95 4.3 vin W vortec would work.

Chris


I think I still have the number Chris. I will look the next time I get a chance. I just remember it was a Timkin bearing




Jason
99 Z24 Supercharged
157hp/171tq - NA
190hp/170tq @ 6psi

LG0/LD9 for Life
Re: M45 Kit Idler pulley
Friday, February 26, 2010 1:27 PM
Idler pulley: 88960493
Idler pulley bearing: 88960581
Idler bracket asembly: 12498289

I could not find the first two at the dealers nor internet, maybe a GM parts guy here may have better luck. I had to finally buy the whole bracket for $150 w/tax.



>>>For Sale? Clicky!<<<
-----The orginal Mr.Goodwrench on the JBO since 11/99-----

Re: M45 Kit Idler pulley
Friday, February 26, 2010 8:44 PM
I am a parts guy. No pulley anywhere in the country as far as dealer listings go. I ordered in two styles of the vortec idlers and both were too big to fly. So for now I've used used spme foil tape between the bearing and pulley to quite the thing down.

I searched past posts and I did see mention of a big bearing used to replace the unit but no reference to a part number or brand. That would be very helpful if anyone has the ability to research it again..


Heavy ass N-body
Re: M45 Kit Idler pulley
Saturday, February 27, 2010 6:28 AM
.............

Did ya look on OECNNECTION, Tracks?

Its been discontinued for some time.....

I would advise all to use the bearing though. Less to go wrong.

Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Re: M45 Kit Idler pulley
Saturday, February 27, 2010 6:47 AM
Are you guys just seeing wear or are you hearing noise? One of my bearings in that area is making noise, and I'm currently not sure if its the s/c snout or the idler.



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- Sold my beloved J in April 2010 -
Re: M45 Kit Idler pulley
Saturday, February 27, 2010 8:12 AM
Mine 'clicked\hummed"....

Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08


Re: M45 Kit Idler pulley
Saturday, February 27, 2010 8:47 AM
I was getting like a grinding noise. took the pulley off and the bearing had started to spin in the pulley. i just made some small spot welds on it and it seems to be holdin up.... but for how long. I have been looking for a bearing and I can't find one anywhere. I talked to a guy who makes bearings and he is gonna see what he can do.
Re: M45 Kit Idler pulley
Saturday, February 27, 2010 9:18 AM
That worked for me... for 4 days.

Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Re: M45 Kit Idler pulley
Saturday, February 27, 2010 7:19 PM
Listening and subscribed.


Misnblu.com
Newbie member since 1999
Thank you Dave and JBO!





Re: M45 Kit Idler pulley
Sunday, February 28, 2010 5:24 AM
Well I'll be damned.

I've had some terrible bearing noise for many many months now. I left it alone since I have a second car now that I drive almost daily. I thought my M45 snout bearing was going bad, but after taking the belt off today and messing with the pulleys, my idler pulley is the one that's loose and can spin and rock on the bearing. I tried taking the pulley off, but I think the bearing inner race is rusted to the bracket. I tried some PB but no luck, so I left it on there for now. After putting the bolt back in, it looks like the PB has acted as a lubricant somewhat and has quieted down the loose idler pulley for now.

So I guess I shall be researching this as well. I'll be listening on this thread as well and I'll post something if I find anything worthwhile. The funny thing is, I just replaced an idler pulley on my other car yesterday.



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- Sold my beloved J in April 2010 -
Re: M45 Kit Idler pulley
Sunday, February 28, 2010 5:40 AM
Btw, GMpartsdirect has the full assembly for $199 shipped (to me), Superchevyperformance $189, and Jegs is $252 or so.



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- Sold my beloved J in April 2010 -
Re: M45 Kit Idler pulley
Sunday, February 28, 2010 7:21 AM
Ryan, was researching this and thought he found a bearing that could be used.



FU Tuning



Re: M45 Kit Idler pulley
Sunday, February 28, 2010 7:26 AM
what does the bearing noise sound like that you guys are having?



http://www.cardomain.com/ride/2623318



Re: M45 Kit Idler pulley
Sunday, February 28, 2010 9:35 PM
Viper,
That's very similar to what happened to me, and I suggested to look for this when I had the issue. You can also conclude if the noise is there if you place a long metal bar and with your hand and cup it, place the bar at the top of areas where you think it may sound and hear for yourself. I had a similar noise from your other thread.
After I did such a thing, I sprayed WD-40 and it was gone, I immediately replaced mine in 1 hr.



>>>For Sale? Clicky!<<<
-----The orginal Mr.Goodwrench on the JBO since 11/99-----

Re: M45 Kit Idler pulley
Sunday, February 28, 2010 10:30 PM
I wonder if the bearing is rusting or seizing, and the pulley is forced to continue rotating and finally ends up breaking free from the outer race.



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- Sold my beloved J in April 2010 -
Re: M45 Kit Idler pulley
Monday, March 01, 2010 8:44 AM
What I saw was two things; the pulley was slightly loose and most of the bearing greese was on the lip of the pulley near the bolt.



>>>For Sale? Clicky!<<<
-----The orginal Mr.Goodwrench on the JBO since 11/99-----


Re: M45 Kit Idler pulley
Wednesday, March 03, 2010 5:26 PM
Quote:

THIS is a bearing only, it replaces the whole idler pulley, and its alittle biger, works GREAT..

NSK
6403-2RS1/C3


Chris



IF I HAVE TO DIG THIS OUT ONE MORE TIME................

Chris




'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08

Re: M45 Kit Idler pulley
Thursday, March 04, 2010 10:57 AM
Thanks. I stored the number in my BlackBerry so I'll post it for you from now on! Now I just need to find a place that can order it for me.

For the time being I found a usable replacement at Autozone. The manager was nice enough to let me in the back and browse the shelves till I found the smallest pulley they had. Duralast # 231135. It's a metal pulley that is a bit bigger then the stock and only as wide as the belt, but if you have pulley that's about to explode it's a lot better then that, haha.


Heavy ass N-body
Re: M45 Kit Idler pulley
Thursday, March 04, 2010 11:15 AM
I looked at the bearing under SKF's catalog, and it doesn't seem to be as wide as the belt, which I don't think would be a great idea.

As for Duralast number, how much bigger is "a bit" bigger? There isn't that much more room on the tensioner.



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- Sold my beloved J in April 2010 -
Re: M45 Kit Idler pulley
Thursday, March 04, 2010 11:39 AM
It's on my car and running with no belt rub.


Heavy ass N-body
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