C7 Z06 Discussion General Z06 Corvette Discussion, LT4 Corvette Technical Info, Performance Upgrades, Suspension Setup for Street or Track

LT4 belt drive differences?

Thread Tools
 
Search this Thread
 
Old Aug 3, 2018 | 12:57 AM
  #1  
TorchZ51's Avatar
TorchZ51
Thread Starter
Pro
Conversation Starter
All Eyes On Me
Photogenic
Liked
 
Joined: Oct 2017
Posts: 571
Likes: 208
Default LT4 belt drive differences?

Was there at change at some point to the LT4 belt drive? I have an additional smooth idler circled red in the pic. But other searches show this pulley not part of the belt drive



Reply
Old Aug 3, 2018 | 09:46 AM
  #2  
atljar's Avatar
atljar
Melting Slicks
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2006
Posts: 2,080
Likes: 407
From: Mason Ohio
Default

2015 is different than 16+
Reply
Old Aug 3, 2018 | 10:22 AM
  #3  
dar02081961's Avatar
dar02081961
Melting Slicks
15 Year Member
Loved
Community Favorite
Top Answer: 5
 
Joined: Oct 2007
Posts: 2,398
Likes: 858
Default

Originally Posted by TorchZ51
Was there at change at some point to the LT4 belt drive? I have an additional smooth idler circled red in the pic. But other searches show this pulley not part of the belt drive



Curious.....is the bottom photo of your engine?
If this is the case the difference could be you have a crate engine and not the LT4 accessory drive as installed in the Corvette application.
Not saying atljar is wrong, just my conclusion based on the evidence presented.
Reply
Old Aug 3, 2018 | 10:52 AM
  #4  
atljar's Avatar
atljar
Melting Slicks
15 Year Member
Liked
Loved
Community Favorite
 
Joined: Jul 2006
Posts: 2,080
Likes: 407
From: Mason Ohio
Default

Originally Posted by dar02081961
Curious.....is the bottom photo of your engine?
If this is the case the difference could be you have a crate engine and not the LT4 accessory drive as installed in the Corvette application.
Not saying atljar is wrong, just my conclusion based on the evidence presented.
I totally could be! LOL. I just know Weapon X sells different belt lengths for the blowers on 2015 vs other years.
Reply
Old Aug 3, 2018 | 02:32 PM
  #5  
dar02081961's Avatar
dar02081961
Melting Slicks
15 Year Member
Loved
Community Favorite
Top Answer: 5
 
Joined: Oct 2007
Posts: 2,398
Likes: 858
Default

Originally Posted by atljar
I totally could be! LOL. I just know Weapon X sells different belt lengths for the blowers on 2015 vs other years.
This is Interesting. I would like to be sure in the event I run into this in the future.

The parts manual calls out the same belt for 2015-2017.
These sources could be wrong so who knows.

https://www.gmpartsdirect.com/oem-pa...YtMmwtdjgtZ2Fz

https://www.gmpartsdirect.com/auto-p...d-pulleys-scat

https://www.gmpartsdirect.com/auto-p...d-pulleys-scat

Reply
Old Aug 3, 2018 | 02:34 PM
  #6  
TorchZ51's Avatar
TorchZ51
Thread Starter
Pro
Conversation Starter
All Eyes On Me
Photogenic
Liked
 
Joined: Oct 2017
Posts: 571
Likes: 208
Default


Can anyone confirm if their 15 or 16 has the additional pulley circle in red?
Reply
Old Aug 3, 2018 | 03:09 PM
  #7  
Bill Dearborn's Avatar
Bill Dearborn
Tech Contributor
25 Year Member
Liked
Top Answer: 1
Top Answer: 3
 
Joined: Oct 1999
Posts: 41,066
Likes: 9,829
From: Charlotte, NC (formerly Endicott, NY)
Default

My 2015 has an idler pulley in that location.

Bill
Reply
Old Oct 2, 2024 | 03:42 PM
  #8  
Hummelj12's Avatar
Hummelj12
Heel & Toe
All Eyes On Me
 
Joined: Oct 2024
Posts: 24
Likes: 0
From: Indiana
Default

Originally Posted by TorchZ51
Was there at change at some point to the LT4 belt drive? I have an additional smooth idler circled red in the pic. But other searches show this pulley not part of the belt drive



I know Im a few years late to this topic, im running into an issue with that bracket. Needed to replace the bracket, I have a 2018, looks the same as yours, but can only find brackets without that lower idler. Also, correct me if im wrong, isnt that belt supposed to go over the top of that lower idler, not the bottom of it.
Reply
Corvette Stories

The Best of Corvette for Corvette Enthusiasts

story-0

2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

 Michael S. Palmer
story-1

5 Best & 5 Worst Corvette Daily Drivers

 Joe Kucinski
story-2

The Headlights of Every Corvette Generation Explained

 Joe Kucinski
story-3

5 Best & 5 Most Overrated Corvette Track Packages of All Time!

 Joe Kucinski
story-4

Every 2027 Corvette Engine Explained

 Joe Kucinski
story-5

Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

 Verdad Gallardo
story-6

10 Ugly Corvettes That We Still Kinda Love

 Joe Kucinski
story-7

Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

 Brett Foote
story-8

10 Things Every Corvette Owner Needs (2026 Edition)

 Michael S. Palmer
story-9

8 Most "Only Corvette Owners Understand" Quirks and Problems

 Pouria Savadkouei
Old Aug 27, 2025 | 09:25 AM
  #9  
Hummelj12's Avatar
Hummelj12
Heel & Toe
All Eyes On Me
 
Joined: Oct 2024
Posts: 24
Likes: 0
From: Indiana
Default

Originally Posted by Hummelj12
I know Im a few years late to this topic, im running into an issue with that bracket. Needed to replace the bracket, I have a 2018, looks the same as yours, but can only find brackets without that lower idler. Also, correct me if im wrong, isnt that belt supposed to go over the top of that lower idler, not the bottom of it.

Hello, i am having this issue as well, did you ever find a work around, i bought a bracket but it is for the Zl1 with no lower idler and didn't know if that will work due to belt wrap.
Reply

Get notified of new replies

To LT4 belt drive differences?





All times are GMT -4. The time now is 08:01 PM.

story-0
2027 Chevrolet Silverado 1500 First Look: Everything You NEED to Know!

Slideshow: Is the 2027 Chevrolet Silverado 1500 the best Silverado yet?

By Michael S. Palmer | 2026-06-16 08:01:12


VIEW MORE
story-1
5 Best & 5 Worst Corvette Daily Drivers

Slideshow: 5 best and 5 worst Corvette daily drivers

By Joe Kucinski | 2026-06-15 10:32:13


VIEW MORE
story-2
The Headlights of Every Corvette Generation Explained

Slideshow: The headlights of every Corvette generation explained

By Joe Kucinski | 2026-06-15 10:17:14


VIEW MORE
story-3
5 Best & 5 Most Overrated Corvette Track Packages of All Time!

Slideshow: The 5 best and 5 most overrated Corvette track packages ever.

By Joe Kucinski | 2026-06-09 12:46:45


VIEW MORE
story-4
Every 2027 Corvette Engine Explained

Slideshow: Every 2027 Corvette engine explained

By Joe Kucinski | 2026-06-09 12:16:31


VIEW MORE
story-5
Designer Imagines A Corvette That Looks More Like a Corvette Than the Corvette

Slideshow: A Jaguar designer's personal project imagines what a modern front-engined Corvette might look like if Chevrolet revisited the golden age of the Stingray.

By Verdad Gallardo | 2026-06-08 19:53:43


VIEW MORE
story-6
10 Ugly Corvettes That We Still Kinda Love

Slideshow: 10 ugly Corvettes that we still kinda love.

By Joe Kucinski | 2026-06-03 10:34:17


VIEW MORE
story-7
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer

A lot of money has changed hands at the online auction house over the years.

By Brett Foote | 2026-06-03 10:21:50


VIEW MORE
story-8
10 Things Every Corvette Owner Needs (2026 Edition)

Slideshow: 10 great gifts Corvette enthusiasts actually want for Father's Day!

By Michael S. Palmer | 2026-06-03 15:43:40


VIEW MORE
story-9
8 Most "Only Corvette Owners Understand" Quirks and Problems

Slideshow: These are the quirks, annoyances, and oddly lovable problems that every Corvette owner eventually learns to live with.

By Pouria Savadkouei | 2026-05-28 09:31:39


VIEW MORE