# what would cause a pressure plate to crack? **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [October 29, 2007, 3:54pm UTC](https://forums.speedlife.net/t/what-would-cause-a-pressure-plate-to-crack/37836 "2007-10-29T15:54:57Z")\ **Posts on this page:** 10\ **Page:** 1
**Author:** ![TRP951](https://avatars.discourse-cdn.com/v4/letter/t/b77776/32.png) [@TRP951](https://forums.speedlife.net/u/TRP951)\ **Post date:** [October 29, 2007, 3:54pm UTC](https://forums.speedlife.net/t/what-would-cause-a-pressure-plate-to-crack/37836/1 "2007-10-29T15:54:57Z")
This is the second time that my clutch diaphragm has cracked. It cracked the same way as last time 3 fingers apart on the diaphragm. Balance shafts were aligned porperly, new clutch parts, the plate was balanced. Here is a pic of the last time it happened. ![http://i121.photobucket.com/albums/o218/TRP951/kepcracked.jpg](http://i121.photobucket.com/albums/o218/TRP951/kepcracked.jpg) ---
**Author:** ![HYBOOST](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/hyboost/32/5088_2.png) [@HYBOOST](https://forums.speedlife.net/u/HYBOOST)\ **Post date:** [November 21, 2007, 2:06pm UTC](https://forums.speedlife.net/t/what-would-cause-a-pressure-plate-to-crack/37836/2 "2007-11-21T14:06:08Z")
I ran into that on customers vehicles a couple times. Ended up engine was missing alignment dowl pin (s). Installed new pins, problem solved. Other things that could cause this, excessive vibration due to bad motor / tranny mounts, improper or sticking t/o bearing. Incorrect, worn, non lubricated pilot bushing / bearing. Worn input shaft @ pilot bearing. Good luck. ---
**Author:** ![dmoffitt](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/dmoffitt/32/7455_2.png) [@dmoffitt](https://forums.speedlife.net/u/dmoffitt)\ **Post date:** [November 22, 2007, 1:43am UTC](https://forums.speedlife.net/t/what-would-cause-a-pressure-plate-to-crack/37836/3 "2007-11-22T01:43:57Z")
aside from your mom sitting on it? j/k. rubber-sprung hub? ---
**Author:** ![MPD47](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mpd47/32/7383_2.png) [@MPD47](https://forums.speedlife.net/u/MPD47)\ **Post date:** [November 22, 2007, 7:44am UTC](https://forums.speedlife.net/t/what-would-cause-a-pressure-plate-to-crack/37836/4 "2007-11-22T07:44:18Z")
Dave I believe Tim is running a KEP plate with a 930 disk? (or a Turbo Cup disk?) ---
**Author:** ![TRP951](https://avatars.discourse-cdn.com/v4/letter/t/b77776/32.png) [@TRP951](https://forums.speedlife.net/u/TRP951)\ **Post date:** [November 22, 2007, 9:14am UTC](https://forums.speedlife.net/t/what-would-cause-a-pressure-plate-to-crack/37836/5 "2007-11-22T09:14:56Z")
I was running the KEP with the 930 disk then it broke and I switched to the clutchnet 6 puck copper/ceramic. I was using the stock flywheel but now I got a 6lb fidanza:) ---
**Author:** ![MPD47](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/mpd47/32/7383_2.png) [@MPD47](https://forums.speedlife.net/u/MPD47)\ **Post date:** [November 22, 2007, 3:52pm UTC](https://forums.speedlife.net/t/what-would-cause-a-pressure-plate-to-crack/37836/6 "2007-11-22T15:52:31Z")
And you’ve cracked both setups or just the KEP one? ---
**Author:** ![Harvey](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/harvey/32/5069_2.png) [@Harvey](https://forums.speedlife.net/u/Harvey)\ **Post date:** [November 22, 2007, 4:00pm UTC](https://forums.speedlife.net/t/what-would-cause-a-pressure-plate-to-crack/37836/7 "2007-11-22T16:00:38Z")
I would normally suggest excessive heat, riding the clutch or maybe some slippage if hp\> clutch, but I can’t see any discoloration. ---
**Author:** ![Carnut](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/carnut/32/7590_2.png) [@Carnut](https://forums.speedlife.net/u/Carnut)\ **Post date:** [November 22, 2007, 4:14pm UTC](https://forums.speedlife.net/t/what-would-cause-a-pressure-plate-to-crack/37836/8 "2007-11-22T16:14:52Z")
Over extension from being out of adjustment. ---
**Author:** ![Toda\_Party](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/toda_party/32/7354_2.png) [@Toda\_Party](https://forums.speedlife.net/u/Toda_Party)\ **Post date:** [November 22, 2007, 4:18pm UTC](https://forums.speedlife.net/t/what-would-cause-a-pressure-plate-to-crack/37836/9 "2007-11-22T16:18:16Z")
lil jb weld and ur good to go :tup: ---
**Author:** ![TRP951](https://avatars.discourse-cdn.com/v4/letter/t/b77776/32.png) [@TRP951](https://forums.speedlife.net/u/TRP951)\ **Post date:** [November 22, 2007, 8:44pm UTC](https://forums.speedlife.net/t/what-would-cause-a-pressure-plate-to-crack/37836/10 "2007-11-22T20:44:59Z")
[quote=“MPD47,post:6,topic:37836"”] And you’ve cracked both setups or just the KEP one? [/quote] yup both setups 🙂 although I got a brand new clutch fork here($400:( )and it seems that the fingers are a little shorter than the one that was in my car like 1mm so that could be the problem