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08-26-2010, 12:05 PM
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CC Member
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Join Date: Sep 2008
Cobra Make, Engine: B&B
Posts: 30
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Not Ranked
Hyd. throwout bearing question
Guys I have a new Wilwood master with a Mcleod bearing setup. when the car is cold and for the first 10 miles nothing slips. After everything is hot I'm getting clutch slipping. Car has 200 miles on it. I'm thinking it may still have air in the lines, since these are a bear to get bled. Any ideas?
Last edited by jlb169; 08-26-2010 at 12:14 PM..
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08-26-2010, 01:24 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,391
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Not Ranked
What's the clearance between the bearing and the pressure plate fingers at rest?
Diaphragm plate? Long style plate?
__________________
www.lykinsmotorsports.com
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08-26-2010, 06:07 PM
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CC Member
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Join Date: Sep 2008
Cobra Make, Engine: B&B
Posts: 30
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I haven't pulled it apart yet. but I do know it was set to the recommended clearance when we built it. any other possibilities.
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08-26-2010, 06:12 PM
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CC Member
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Join Date: Jan 2003
Location: Atlanta,
GA
Cobra Make, Engine: CAV GT40 with 331 KC
Posts: 2,187
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Where does your pedal engage?
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08-26-2010, 07:35 PM
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CC Member
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Join Date: Sep 2008
Cobra Make, Engine: B&B
Posts: 30
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an inch off the floor, also have play at the top of the pedal
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08-27-2010, 07:23 AM
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CC Member
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Join Date: Aug 2009
Location: Edinburg,
TX
Cobra Make, Engine: Everett Morrison, All aluminum small block ford.
Posts: 436
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Does the engagement level or the play at the top of the pedal change from when the cars cold to hot?
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" If it wont break em loose in 3rd gear, it aint enough power "
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08-27-2010, 07:38 AM
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CC Member
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Join Date: Sep 2008
Cobra Make, Engine: B&B
Posts: 30
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seems to get closer to the top like something is expanding the bearing and not letting the clutch fully engage. thats why I was leaning towards air.
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08-27-2010, 09:18 AM
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CC Member
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Join Date: Aug 2009
Location: Edinburg,
TX
Cobra Make, Engine: Everett Morrison, All aluminum small block ford.
Posts: 436
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Air will generaly make for a soft and spongy pedal. It will almost feel as if your pushing on a spring instead of a shock absorber...if that makes sence. The amount of air you would have to have in the system for that much expansion due to heat would be alot. Im not sure you would even have a pedal if there was that much air.
Im thinking the clearence is getting tighter on the sleeve and not letting the bearing retract all the way. Why that is happening is the million dollar question. Maybe a little nick during set up, maybe it was machined wrong from the factory, etc etc etc.
I hate to say it but it need to be pulled and inspected. I think youll likely find the problem once you put an eyeball and a mic on it.
Gene
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" If it wont break em loose in 3rd gear, it aint enough power "
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08-27-2010, 11:03 AM
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CC Member
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Join Date: Mar 2005
Location: hilliard,
oh
Cobra Make, Engine: factory five roadster with a stock 87 302
Posts: 47
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How close is your line to the bearing to your exhaust. Maybe the fluid is overheating and expanding. Maybe insolating that line or moving it would help. You could also try a high temp fluid.
Doug
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08-27-2010, 11:11 AM
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CC Member
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Join Date: Sep 2008
Cobra Make, Engine: B&B
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Thats a thought. the line does run right past the headers. suggestion for high temp fluid?
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08-27-2010, 12:22 PM
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Join Date: Mar 2005
Location: hilliard,
oh
Cobra Make, Engine: factory five roadster with a stock 87 302
Posts: 47
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I used the highest temp fluid that jegs had. I used non synthetic dot three. I believe that is what Mcleod recomends. I also had to reroute my hard line away from the header. |
08-27-2010, 12:53 PM
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Join Date: Sep 2008
Cobra Make, Engine: B&B
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Thanks I 'll take a look at it. I think it's dot 4 in it now. I'm not sure what the difference is but I'll look into it.
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08-27-2010, 01:09 PM
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Join Date: Feb 2002
Location: Dadeville,
AL
Cobra Make, Engine: Sold my EM.
Posts: 2,439
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If the problem comes from heated fluid, you should be able to rig a temporary heat shield to test the idea. That would be a quick and easy way to determine if that is the problem. BTW, I don't think that is the problem.
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Tommy
Cheetah tribute completed 2021 (TommysCars.Weebly.com)
Previously owned EM Cobra
"Never attribute to malice that which is adequately explained by stupidity." - Hanlon's Razor
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08-27-2010, 01:24 PM
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CC Member
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Join Date: Aug 2009
Location: Edinburg,
TX
Cobra Make, Engine: Everett Morrison, All aluminum small block ford.
Posts: 436
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Quote:
Originally Posted by Tommy
If the problem comes from heated fluid, you should be able to rig a temporary heat shield to test the idea. That would be a quick and easy way to determine if that is the problem. BTW, I don't think that is the problem.
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Its a great place to start. Beats the hell out of pulling the bearing...lol. I have to agree though,I dont think thats the problem either.
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" If it wont break em loose in 3rd gear, it aint enough power "
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09-01-2010, 05:27 AM
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Join Date: Aug 2009
Location: Edinburg,
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Cobra Make, Engine: Everett Morrison, All aluminum small block ford.
Posts: 436
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I wonder what the problem ended up being.
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" If it wont break em loose in 3rd gear, it aint enough power "
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