 Pressure Plate Finger Grooves, caused by the throwout bearing |
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Wednesday, 20 August 2025 |
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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: 20,180 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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Replies
| r_towle |
Dec 9 2014, 10:00 PM
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#2
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Custom Member Group: Members Posts: 24,705 Joined: 9-January 03 From: Taxachusetts Member No.: 124 Region Association: North East States 
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Got it....
Again, it's a risk, but if it's free or super cheap, and you are ok replacing it eventually, go for it....but know it's an issue that will need to be fixed...soon. |
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| JStroud |
Dec 10 2014, 09:16 AM
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#3
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Senior Member Group: Members Posts: 1,463 Joined: 15-January 11 From: Galt, California Member No.: 12,594 Region Association: Northern California |
QUOTE(r_towle @ Dec 9 2014, 08:00 PM)  Got it.... Again, it's a risk, but if it's free or super cheap, and you are ok replacing it eventually, go for it....but know it's an issue that will need to be fixed...soon. How soon....are we talking 5000miles, 50,000 miles. (IMG:style_emoticons/default/confused24.gif) If the tip of the fingers break off, what happens, anyone see that? Thanks Jeff |
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| McMark |
Dec 10 2014, 06:21 PM
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#4
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914 Freak! Group: Retired Admin Posts: 20,180 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
QUOTE(JStroud @ Dec 10 2014, 07:16 AM) QUOTE(r_towle @ Dec 9 2014, 08:00 PM) Got it.... Again, it's a risk, but if it's free or super cheap, and you are ok replacing it eventually, go for it....but know it's an issue that will need to be fixed...soon. How soon....are we talking 5000miles, 50,000 miles. (IMG:style_emoticons/default/confused24.gif) If the tip of the fingers break off, what happens, anyone see that? Thanks Jeff Google images shows some of these with broken fingers, so it does happen. Worst case scenario you lose some or all of your ability to disengage the clutch. Then you get it home, pull the transmission with the engine still in place, and swap in a new pressure plate. If it were my personal car, I'd run it and plan on swapping it out in a year or so. |
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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 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 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 a few loose screws Wow, What a dumb design. glad i read this. Another... Dec 10 2014, 05:56 PM DBCooper
Wow, What a dumb design. glad i read this. Anothe... Dec 10 2014, 06:23 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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