Aftermarket Belt Tensioner Pulley Failure - Page 4 - ZR-1 Net Registry Forums

Locobob · 06-02-2019

Locobob · 06-02-2019

Locobob · 06-02-2019

Locobob · 06-02-2019

The pulley turns freely and doesn't make any obnoxious sounds, it does feel a bit sloppy however.

HAWAIIZR-1 · 06-02-2019

Wow! Thanks for sharing. I did check mine out last week after you posted and it seems okay. I’ll keep an eye on it just in case.

Sent from my iPhone using ZR-1 Net Registry

BigJohn · 06-02-2019

Air Cooled Pulley?

Dynomite · 06-02-2019

Quote:

Originally Posted by HAWAIIZR-1

Wow! Thanks for sharing. I did check mine out last week after you posted and it seems okay. I’ll keep an eye on it just in case.

Sent from my iPhone using ZR-1 Net Registry

I have some wear on the pulley from the back side of the Serpentine Belt (must be from the belt flexing as it "bends" around the aluminum pulley). It appears the wear on Locobob's pulley is much more as it appears the back side of the Serpentine Belt has worn completely through the Aluminum surface as I can see ridges (Serpentine Belt is a bit narrower than the pulley riding surface between the two guides).

I am replacing ALL Billet Aluminum Belt Tensioner Pulleys with New Stock Belt Tensioner Pulleys immediately. Why wait

I am not sure why this pulley wears as it does and the vender says he has seen no issues with this pulley. I can confirm the Backside of the Serpentine Belt does wear on the Aluminum in this application.

How many miles on this failed Belt Tensioner Aluminum Pulley?

Locobob · 06-03-2019

The pulley probably had less than 15k miles on it. I mentioned it to Haibeck and he said he's seen two other failures of the aluminum pulley just like this one. So if you have this pulley you better keep a good eye on it. I have the pulley removed from the tensioner now, still no idea why it failed. It seems to spin about the same as the old Dayco pulley I have laying around - both on the shaft and on my finger, no obvious signs of bearing failure. By the way this "lightweight" aluminum pulley is actually 1oz heavier than the Dayco so there's really no reason to run it other than looks.

HAWAIIZR-1 · 06-03-2019

Locobob and Dynomite,

Noted!! I did see my pulley had some wear and I should be concerned too. I don’t have much mileage on mine and probably why minimal wear. I also understand that bearings can behave differently free-spinning with and without load on them.

It seemed like a good idea and nice mod at the time. Maybe just a bad pulley or bearing, but well noted to observe or replace with stock type. I’ll check mine with more detail when I return home. Thanks again for sharing your thoughts and experience.

I guess the moral of the story is to leave sh#t alone!!!

Sent from my iPhone using ZR-1 Net Registry

Locobob · 06-03-2019

Quote:

Originally Posted by HAWAIIZR-1

Locobob and Dynomite,

I guess the moral of the story is to leave sh#t alone!!!

Sent from my iPhone using ZR-1 Net Registry

Hahaha yeah this isn't the first time the modding disease has bit me in the ***, and it probably won't be the last. I am a little more cautious now about making non stock "improvements" though.

06-02-2019	#31
Locobob Join Date: Jan 2004 Location: Portland, OR Posts: 1,047	Re: Pulley Failure __________________ Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368

06-02-2019	#32
Locobob Join Date: Jan 2004 Location: Portland, OR Posts: 1,047	Re: Pulley Failure __________________ Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368

06-02-2019	#33
Locobob Join Date: Jan 2004 Location: Portland, OR Posts: 1,047	Re: Pulley Failure __________________ Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368

06-02-2019	#34
Locobob Join Date: Jan 2004 Location: Portland, OR Posts: 1,047	Re: Pulley Failure The pulley turns freely and doesn't make any obnoxious sounds, it does feel a bit sloppy however. __________________ Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368

06-02-2019	#35
HAWAIIZR-1 Join Date: May 2010 Location: Japan Posts: 3,104	Re: Pulley Failure Wow! Thanks for sharing. I did check mine out last week after you posted and it seems okay. I’ll keep an eye on it just in case. Sent from my iPhone using ZR-1 Net Registry __________________ Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048

06-02-2019	#36
BigJohn Join Date: Feb 2012 Location: Ledyard,CT Posts: 8,327	Re: Pulley Failure Air Cooled Pulley?

06-03-2019	#38
Locobob Join Date: Jan 2004 Location: Portland, OR Posts: 1,047	Re: Pulley Failure The pulley probably had less than 15k miles on it. I mentioned it to Haibeck and he said he's seen two other failures of the aluminum pulley just like this one. So if you have this pulley you better keep a good eye on it. I have the pulley removed from the tensioner now, still no idea why it failed. It seems to spin about the same as the old Dayco pulley I have laying around - both on the shaft and on my finger, no obvious signs of bearing failure. By the way this "lightweight" aluminum pulley is actually 1oz heavier than the Dayco so there's really no reason to run it other than looks. __________________ Robert ZR-1 Net Registry Oregon State Director 91 ZR-1 #431 Black/Black LPE 368 Last edited by Locobob; 06-03-2019 at 01:36 PM.

06-03-2019	#39
HAWAIIZR-1 Join Date: May 2010 Location: Japan Posts: 3,104	Pulley Failure Locobob and Dynomite, Noted!! I did see my pulley had some wear and I should be concerned too. I don’t have much mileage on mine and probably why minimal wear. I also understand that bearings can behave differently free-spinning with and without load on them. It seemed like a good idea and nice mod at the time. Maybe just a bad pulley or bearing, but well noted to observe or replace with stock type. I’ll check mine with more detail when I return home. Thanks again for sharing your thoughts and experience. I guess the moral of the story is to leave sh#t alone!!! Sent from my iPhone using ZR-1 Net Registry __________________ Craig "ZR-1 NO KA 'OI" "ZR-1 ICHIBAN" 1995 #228 Black/Black with Dunn Heads ZR-1 owner since September 2003 ZR-1 Net Registry Founding Member #0074 NCM Lifetime Member #2048 Last edited by HAWAIIZR-1; 06-03-2019 at 03:00 PM.