SRT Hellcat Forum banner
  • Hey Everyone! Vote for the Site Favourite HOTM winner for the year of 2022 HERE!

Modded hellcat breaking belt tensioner

1756 Views 17 Replies 6 Participants Last post by  SrtDex707
Has any had this problem I’ve broken 2 already and it’s not the supercharger tensioner it’s the other one
1 - 3 of 18 Posts
I have upper 2.65 lower 10%ati 1000cc injectors. First I thought it was a broken belt( it was shredded) the we looked closer the tensioner was broken and the damper moved as well replaced the tensioner and one pull it broke again and my power steering pump seized and again it’s my black belt not green

You said the Damper moved? Is your crank pinned?

If it's not, I almost guarantee that you spun the hub on the crank and it backed out. This would either,

1) Spin the crank on the hub and it would walk the belt off and shred it.
2) Stop the belt completely and the inertia of the sudden stop would shred it.

If not that then, did you install the spacer on the pensioner for the accessory belt?
Lots of confusion here...
Accessory belt
Tensioner keeps breaking
Power steering pump is locked up.

Sc belt is not coming off.

Thats where we are currently.

Your accessories are spinning at the same speed as stock regardless of sc pulley size or ATI lower, and run from the crank on their own pulley. A chop off the throttle should not effect that belt.

1. A bad tensioner is ruled out, since 2nd time
2. PS pump is locked up, was it going bad and dragging on the belt?
3. Belt is routed correctly and you had it in the grooves on every pulley?

This is not a common problem on modded hellcats.....

Accessories are not spinning at the factory speed, unless the ATI 10% OD does not OD the accessories and only the blower. Is that the case?
This is incorrect.

Accessories are spinning factory speed from an ATI, it only 10% overdrives the SC belt.
Thank you for clarifying.
1 - 3 of 18 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.