Supercharger Belt Snapped

RamAir02 · 04-15-2023, 06:01 PM

Supercharger belt blew and took a few parts with it. I believe the parts I need are the crankcase vent tube, thermostat housing and belt.

Can anyone help me with part numbers? I'm stranded at the track 😐

Has this happened to anyone else on a stock LT4?

Thanks

*Joshinator99* · 04-15-2023, 07:04 PM

Looks like your car is pretty much stock so that’s a little unusual. It happened to me but way way way cranked up boost lol…. I advise everyone running a blower to run the AMP billet thermostat housing so that way this doesn’t happen again. Belt breakage with the stock housing will always result in an absolute effing mess…! You’re better off trailering the car home and cleaning that mess up IMO. I’d bet money it screwed up your other 2 accessory belts too.

RamAir02 · 04-15-2023, 09:25 PM

Quote:

Originally Posted by Joshinator99

Looks like your car is pretty much stock so that’s a little unusual. It happened to me but way way way cranked up boost lol…. I advise everyone running a blower to run the AMP billet thermostat housing so that way this doesn’t happen again. Belt breakage with the stock housing will always result in an absolute effing mess…! You’re better off trailering the car home and cleaning that mess up IMO. I’d bet money it screwed up your other 2 accessory belts too.

Thanks. Yeah I was surprised this happened on a mostly stock car.

I was able to find a thermostat housing and supercharger belt after trekking around to a few autozones and o'reillys. I also grabbed some 3/8" & 5/16" fuel line hose to try and mend the crankcase vent tube temporarily.

I'd really love to be able to drive the car home. I'm at VIR, about 8 hours from home. Hoping the damage isn't worse than what I've already noticed. Lost a lot of coolant, but I'm thinking that came from the broken overflow on the thermostat housing. I'll inspect it all better in the morning.

I'm also going to check out AMP billet thermostat and a Gates RPM belt to hopefully avoid any issues in the future.

I think the crankcase vent tube that is broken is part number 12687313, but it looks to be discontinued. Anyone have any idea if that's the right part number and if there's a new part number that may have replaced the discontinued part?

Trochoidal · 04-15-2023, 09:39 PM

Looks like Summit has your tube.

https://www.summitracing.com/parts/ado-12687313

*Joshinator99* · 04-15-2023, 09:39 PM

Quote:

Originally Posted by RamAir02

Thanks. Yeah I was surprised this happened on a mostly stock car.

I was able to find a thermostat housing and supercharger belt after trekking around to a few autozones and o'reillys. I also grabbed some 3/8" & 5/16" fuel line hose to try and mend the crankcase vent tube temporarily.

I'd really love to be able to drive the car home. I'm at VIR, about 8 hours from home. Hoping the damage isn't worse than what I've already noticed. Lost a lot of coolant, but I'm thinking that came from the broken overflow on the thermostat housing. I'll inspect it all better in the morning.

I'm also going to check out AMP billet thermostat and a Gates RPM belt to hopefully avoid any issues in the future.

I think the crankcase vent tube that is broken is part number 12687313, but it looks to be discontinued. Anyone have any idea if that's the right part number and if there's a new part number that may have replaced the discontinued part?

I’m surprised you were able to find the parts you did! Nice work.

Make sure the broken belt didn’t get entangled into the other belts, messing them up. That happened to me.

Best of luck getting this all figured out! Give some thought to a trailer to bring your car to the track going forward lol…

RamAir02 · 04-15-2023, 09:52 PM

Quote:

Originally Posted by Trochoidal

Looks like Summit has your tube.

https://www.summitracing.com/parts/ado-12687313

Great find. Ordered and thank you

Zl1+911 · 04-15-2023, 09:53 PM

Sorry to hear! Very strange…haven’t heard of this as a common issue…
Glad u are able to get some of the part and wish u the best to be able to drive back…see u sometime soon this season…

RamAir02 · 04-15-2023, 09:54 PM

Quote:

Originally Posted by Joshinator99

I’m surprised you were able to find the parts you did! Nice work.

Make sure the broken belt didn’t get entangled into the other belts, messing them up. That happened to me.

Best of luck getting this all figured out! Give some thought to a trailer to bring your car to the track going forward lol…

I will inspect everything thoroughly tomorrow. Thanks!

I am also in the market for a trailer. Shame on me for not prioritizing that purchase.

RamAir02 · 04-15-2023, 09:56 PM

Quote:

Originally Posted by Zl1+911

Sorry to hear! Very strange…haven’t heard of this as a common issue…
Glad u are able to get some of the part and wish u the best to be able to drive back…see u sometime soon this season…

Thanks, Amrish. Yeah, really strange. I'll try to get a video clip up

RamAir02 · 04-15-2023, 10:10 PM

Here's a quick PDR clip. I was very confused at first, thought I had driven over a pile of gravel since that was what it sounded like. After the flying belt pieces came the coolant.

https://youtu.be/ynpHwPpqpFE

Stephen12ZL1 · 04-15-2023, 11:19 PM

the upper idler is a common failure and has been the problem for a few here. It caused the same issue on an '18 ZL1 A10 owned by Mojo Scott at VIR as well. He replaced the belt and it immediately shredded again due to the idler locking up. Double check it turns freely...it is the ribbed on directly below the supercharger snout.

Tay · 04-16-2023, 12:07 AM

Quote:

Originally Posted by Stephen12ZL1

the upper idler is a common failure and has been the problem for a few here. It caused the same issue on an '18 ZL1 A10 owned by Mojo Scott at VIR as well. He replaced the belt and it immediately shredded again due to the idler locking up. Double check it turns freely...it is the ribbed on directly below the supercharger snout.

Is there an aftermarket upgrade for the upper idler to prevent this failure?

Zl1+911 · 04-16-2023, 07:50 AM

Not ZLE but similar issue happened to me in my Audi Q7. The underlying issue was not the belt - it was the pulley that had seized. The mechanic explained to me that it’s rare for belts to break at this age or come off - generally it’s a pulley.

Smokin19 · 04-16-2023, 07:58 AM

Get this by AMP and it won't take out your cooling if it happens again. Definitely needed if you build your engine.

04-15-2023, 06:01 PM	#1
RamAir02 Shadow Gray '19 ZLE M6 Drives: '19 ZL1 1LE M6 Join Date: Apr 2009 Location: NJ Posts: 1,458 View My Garage	Supercharger Belt Snapped Supercharger belt blew and took a few parts with it. I believe the parts I need are the crankcase vent tube, thermostat housing and belt. Can anyone help me with part numbers? I'm stranded at the track 😐 Has this happened to anyone else on a stock LT4? Thanks Attached Images __________________ 2019 ZL1 1LE \| M6 \| SGM \| PDR \| CF Dash \| Nav \| Wheel Locks PPF \| Paint Correction \| ZL1 Addons Rock Guards \| ZL1 Addons Lift Pads \| ZL1 Addons Feather Lite Tow Hook \| JWM Smoked Sidemarkers \| Wildhammer Smoked Rear Reflectors \| JWM License Plate LEDs \| RotoFab CAI \| ADM IC Reservoir v2 \| BC Forged RZ05 \| SPL Toe Arms \| BW Brake Deflectors \| CMS Roll Bar \| Schroth Profi II ASM Harnesses . Sold: '99 Trans Am (bolt-ons & cam) \| '00 WS6 (bolt-ons, heads, cam, 12 bolt) \| '05 CTS-V (bolt-ons, short throw) \| '10 SS/RS M6 (short throw, CAI, coilovers, LTs, catback, JRE tune) \| '01 WS6 YouTube

04-15-2023, 07:04 PM	#2
Joshinator99 Moderator Drives: 2017 Camaro 2SS A8 Join Date: Aug 2018 Location: Petersham MA Posts: 6,202	Looks like your car is pretty much stock so that’s a little unusual. It happened to me but way way way cranked up boost lol…. I advise everyone running a blower to run the AMP billet thermostat housing so that way this doesn’t happen again. Belt breakage with the stock housing will always result in an absolute effing mess…! You’re better off trailering the car home and cleaning that mess up IMO. I’d bet money it screwed up your other 2 accessory belts too. __________________ 2017 Chevy Camaro 2SS A8 Whipple 3.0, Mast Black Label heads, ATI 8L90, Fore triple in-tank pumps, 112mm TB, LPE +52% injectors & BB HPFP, TooHighPSI/Katech port injection, 15” conversion 1066 WHP STD/1027 SAE, 9.10@152.5 (new times coming)

04-15-2023, 09:39 PM	#4
Trochoidal Drives: 2017 Camaro 2SS A8 Join Date: May 2019 Location: USA Posts: 1,656	Looks like Summit has your tube. https://www.summitracing.com/parts/ado-12687313 __________________ Roto-Fab w/sound tube delete, Katech ported TB, Pray IM, Velossa, DD side markers, DSX FF, UPR Catch can, Halo brace, My custom vent gauge pod Originally Posted by arpad_m - “Aww, yet another oil thread with almost the same question in the OP“

04-15-2023, 10:10 PM	#10
RamAir02 Shadow Gray '19 ZLE M6 Drives: '19 ZL1 1LE M6 Join Date: Apr 2009 Location: NJ Posts: 1,458 View My Garage	Here's a quick PDR clip. I was very confused at first, thought I had driven over a pile of gravel since that was what it sounded like. After the flying belt pieces came the coolant. https://youtu.be/ynpHwPpqpFE __________________ 2019 ZL1 1LE \| M6 \| SGM \| PDR \| CF Dash \| Nav \| Wheel Locks PPF \| Paint Correction \| ZL1 Addons Rock Guards \| ZL1 Addons Lift Pads \| ZL1 Addons Feather Lite Tow Hook \| JWM Smoked Sidemarkers \| Wildhammer Smoked Rear Reflectors \| JWM License Plate LEDs \| RotoFab CAI \| ADM IC Reservoir v2 \| BC Forged RZ05 \| SPL Toe Arms \| BW Brake Deflectors \| CMS Roll Bar \| Schroth Profi II ASM Harnesses . Sold: '99 Trans Am (bolt-ons & cam) \| '00 WS6 (bolt-ons, heads, cam, 12 bolt) \| '05 CTS-V (bolt-ons, short throw) \| '10 SS/RS M6 (short throw, CAI, coilovers, LTs, catback, JRE tune) \| '01 WS6 YouTube

04-15-2023, 11:19 PM	#11
Stephen12ZL1 Drives: '21 ZLE A10 Join Date: May 2012 Location: Mechanicsville, VA Posts: 6,824	the upper idler is a common failure and has been the problem for a few here. It caused the same issue on an '18 ZL1 A10 owned by Mojo Scott at VIR as well. He replaced the belt and it immediately shredded again due to the idler locking up. Double check it turns freely...it is the ribbed on directly below the supercharger snout. __________________ '21 ZLE A10 Wild Cherry PDR 2:00.78 VIR Full 10.68@131.69 1.68 60' '17 ZL1 A10 Mosaic Black PDR/Nav 2:03.08 VIR Full 11.003@129.2 1.75 (sold) '15 Z/28 #325 Black a/c & stereo. 2:10.1 VIR Full (sold) '12 ZL1 A6 Black 10.52@131 1.55 60' 2:13 VIR Full (sold)

04-15-2023, 09:53 PM	#7
Zl1+911 Drives: 997 GTS, ZL1 A10, ZLEM6, ZLEA10 Join Date: Dec 2017 Location: NYC/NJ Posts: 630	Sorry to hear! Very strange…haven’t heard of this as a common issue… Glad u are able to get some of the part and wish u the best to be able to drive back…see u sometime soon this season…

04-16-2023, 07:50 AM	#13
Zl1+911 Drives: 997 GTS, ZL1 A10, ZLEM6, ZLEA10 Join Date: Dec 2017 Location: NYC/NJ Posts: 630	Not ZLE but similar issue happened to me in my Audi Q7. The underlying issue was not the belt - it was the pulley that had seized. The mechanic explained to me that it’s rare for belts to break at this age or come off - generally it’s a pulley.

04-16-2023, 07:58 AM	#14
Smokin19 Drives: 19' ZL1 A10, w/pdr Join Date: Sep 2014 Location: S.W. ohio Posts: 1,700	Get this by AMP and it won't take out your cooling if it happens again. Definitely needed if you build your engine. Attached Images __________________ BTR Stg II cam w/ 38% fuel lobe, ARH 2" headers into 3" w/Gesi cats, Kong X port, Weapon X triple ht exchangers, NW 103, Rotofab big gulp, DSX lowside, TCM tune, BMR Lockout, Mustang dyno 720 rwhp, 634 rwtq on 93 pump.

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