 Pressure Plate Finger Grooves, caused by the throwout bearing |
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| McMark |
 Dec 9 2014, 11:25 AM
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#1
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914 Freak!  Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None  |
Hey guys, check my logic here. I see this type of grooving all the time, on nearly every pressure plate I see - regardless of engine type, horsepower, etc. I hadn't given it too much thought other than, "I don't like it, but it happens every time." But I was just talking with someone and it occurred to me that this might be wear caused by a bad throwout bearing. If the grease is sticky, or if dirt has infiltrated the bearing, it may not be able to rotate/spin correctly and would slip causing wear.
The point of the throwout bearing should be to stop exactly this type of wear, right? Doest this mean bad throwout bearings are super common? Or is this a symptom of a loose clutch cable, not holding the throwout bearing tight to the fingers and that lets them slip? Attached thumbnail(s) 
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| a few loose screws |
Dec 10 2014, 05:56 PM
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#2
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Member Group: Members Posts: 168 Joined: 8-August 14 From: canada Member No.: 17,754 Region Association: None |
Wow, What a dumb design. glad i read this. Another thing to modify as I slowly get this crate together. Neat little car, but lots of room for improvement no doubt.
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| DBCooper |
Dec 10 2014, 06:23 PM
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#3
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14's in the 13's with ATTITUDE Group: Members Posts: 3,079 Joined: 25-August 04 From: Dazed and Confused Member No.: 2,618 Region Association: Northern California |
QUOTE(a few loose screws @ Dec 10 2014, 03:56 PM)  Wow, What a dumb design. glad i read this. Another thing to modify as I slowly get this crate together. Neat little car, but lots of room for improvement no doubt. It's not just this car, it's every older car. Those clutches work fine for decades... just not forever. I've never seen a failure because of wear on the clutch fingers, the rest of the clutch is toast first. Actually now that I think about it maybe I have, but it's not common. |
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Posts in this topic
McMark Pressure Plate Finger Grooves Dec 9 2014, 11:25 AM
altitude411 How many miles are on that PP? What type of drivin... Dec 9 2014, 11:31 AM aircooledboy
The point of the throwout bearing should be to s... Dec 9 2014, 11:40 AM
Dave_Darling I thought ideally your throw out should hover just... Dec 9 2014, 07:45 PM scruz914
..... there is always pressure on the throwout be... Dec 9 2014, 08:23 PM DBCooper
I thought ideally your throw out should hover jus... Dec 10 2014, 09:39 AM Dave_Darling
I don't think so. There's also a much la... Dec 10 2014, 11:06 AM Bartlett 914
Hey guys, check my logic here. I see this type o... Dec 9 2014, 12:12 PM roblav1 Looks like a real lot shifting, a too tight cable,... Dec 9 2014, 12:19 PM Valy It happens to all pressure plates, regardless of c... Dec 9 2014, 12:23 PM Elliot Cannon This is one reason I have been taught in the past ... Dec 9 2014, 12:41 PM r_towle
This is one reason I have been taught in the past... Dec 9 2014, 07:34 PM wndsnd I have learned this as well. Always go into neutr... Dec 9 2014, 01:13 PM McMark 356 Pressure Plate of unknown age.
914 Pressure ... Dec 9 2014, 01:21 PM scruz914 Do you have photos of the throwout bearing?
What d... Dec 9 2014, 01:34 PM JStroud So my question, the PP picture in the first post, ... Dec 9 2014, 08:29 PM SirAndy I ask because I'm the one that sent it to McMa... Dec 9 2014, 08:51 PM Cap'n Krusty
I ask because I'm the one that sent it to McM... Dec 9 2014, 09:06 PM r_towle
I ask because I'm the one that sent it to McM... Dec 9 2014, 09:50 PM SirAndy From what I could tell once it started to get loud... Dec 9 2014, 09:56 PM tdgray I just changed my fifty plus year old original pre... Dec 9 2014, 08:43 PM larryM here is a good start for further investigation: se... Dec 9 2014, 08:50 PM r_towle Got it....
Again, it's a risk, but if it's... Dec 9 2014, 10:00 PM SirAndy if it's free or super cheap
I have yet to rec... Dec 9 2014, 10:03 PM JStroud
if it's free or super cheap
I have yet to re... Dec 9 2014, 10:10 PM JStroud
Got it....
Again, it's a risk, but if it... Dec 10 2014, 09:16 AM McMark
Got it....
Again, it's a risk, but if it... Dec 10 2014, 06:21 PM r_towle
[quote name='JStroud' post='2120733' date='Dec 10... Dec 10 2014, 07:01 PM JStroud
[quote name='JStroud' post='2120733' date='Dec 1... Dec 11 2014, 12:36 AM DBCooper Ahhchh.... you're right, Dave, that spring is ... Dec 10 2014, 03:30 PM DBCooper Fingers broke on my son's Kennedy pressure pla... Dec 10 2014, 06:32 PM Bartlett 914 A lot of the comments seem to point to the throwou... Dec 10 2014, 06:32 PM a few loose screws I was referring to the clutch release bearing havi... Dec 10 2014, 06:44 PM edwin Most clutches that I've replaced have looked l... Dec 11 2014, 01:57 AM |
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