Spec Stage 3+ ?'s
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From: Van down by the river....
Spec Stage 3+ ?'s
I just got my clutch and im ready to install. I heard a rumor that there is a dowel pin in the trans that has to be removed to install . My question is there any mods that need to be done to install this clutch, or is it a direct bolt on other than the obvious replacement of the throwout bearing and machine the flywheel. Thanx in advance 
- Gary
- Gary
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Joined: 06-22-09
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From: Kathmandu
I just got my clutch and im ready to install. I heard a rumor that there is a dowel pin in the trans that has to be removed to install . My question is there any mods that need to be done to install this clutch, or is it a direct bolt on other than the obvious replacement of the throwout bearing and machine the flywheel. Thanx in advance - Gary
- GaryClutch - SPEC Stage2+ : SPEC SC073H-3
Flywheel : SPEC SC07A-3 Listed on the TTR site for the '08 HHR SS LNF
You have to have 3 holes drilled out to 12mm on the stock flywheel to use it. The dowel pins on the spec are larger. I opted for the matching flywheel.
If you specify that you want it for the stocker, they include the dowel pins. I was going that route initially and changed my mind. Called SPEC and found out the discs are the same in our case so it was no problem. Jeremy from SPEC informed me in most cases the discs would be different on other applications.
Flywheel : SPEC SC07A-3 Listed on the TTR site for the '08 HHR SS LNF
You have to have 3 holes drilled out to 12mm on the stock flywheel to use it. The dowel pins on the spec are larger. I opted for the matching flywheel.
If you specify that you want it for the stocker, they include the dowel pins. I was going that route initially and changed my mind. Called SPEC and found out the discs are the same in our case so it was no problem. Jeremy from SPEC informed me in most cases the discs would be different on other applications.
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From: Des Moines, IA
I just removed the dowels on my flywheel, I did this on suggestion from Bill Duncan actually and its been fine like he said it would be. They were a bitch to get out, I had to go borrow a dowel remover from a friend.
EDIT: https://www.cobaltss.net/forums/show...5&postcount=15
A post I made awhile back with more details.
EDIT: https://www.cobaltss.net/forums/show...5&postcount=15
A post I made awhile back with more details.
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From: Van down by the river....
This is what i was referring too... i have heard it is a direct bolt on. I have heard about the hole reeming and dowel removal. i wood like to find out for sure before i rip it out. I may send it back and go with clutchmasters stage4.
BTW... i want to keep the stock flywheel and not remove dowels they were put there for a reason.
BTW... i want to keep the stock flywheel and not remove dowels they were put there for a reason.
Last edited by Willis08tc; Feb 25, 2010 at 12:30 PM. Reason: Automerged Doublepost
Curious...
If the dowels are not needed during operation, why did SPEC opt to make them larger?
I guess I need to study where all the force is being applied to the clutch parts if the dowels don't have any function during operation.
I'm not a B.S.M.E., just a lowly A.S.E.E.
If the dowels are not needed during operation, why did SPEC opt to make them larger?
I guess I need to study where all the force is being applied to the clutch parts if the dowels don't have any function during operation.
I'm not a B.S.M.E., just a lowly A.S.E.E.
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From: Erie Pennsylvania
This is what i was referring too... i have heard it is a direct bolt on. I have heard about the hole reeming and dowel removal. i wood like to find out for sure before i rip it out. I may send it back and go with clutchmasters stage4.
BTW... i want to keep the stock flywheel and not remove dowels they were put there for a reason.
BTW... i want to keep the stock flywheel and not remove dowels they were put there for a reason.
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Joined: 02-09-09
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From: Tejas
This is what i was referring too... i have heard it is a direct bolt on. I have heard about the hole reeming and dowel removal. i wood like to find out for sure before i rip it out. I may send it back and go with clutchmasters stage4.
BTW... i want to keep the stock flywheel and not remove dowels they were put there for a reason.
BTW... i want to keep the stock flywheel and not remove dowels they were put there for a reason.
If this is your DD you might want to reconsider that clutch... One member on here that I tuned had that clutch and it was not a very street-friendly application in my opinion. To tell the truth... that clutch was either engaged on disengaged... very little play and next to no slipping to get it started.
Curious...
If the dowels are not needed during operation, why did SPEC opt to make them larger?
I guess I need to study where all the force is being applied to the clutch parts if the dowels don't have any function during operation.
I'm not a B.S.M.E., just a lowly A.S.E.E.
If the dowels are not needed during operation, why did SPEC opt to make them larger?
I guess I need to study where all the force is being applied to the clutch parts if the dowels don't have any function during operation.
I'm not a B.S.M.E., just a lowly A.S.E.E.
Yes, I see the logic in that from a mfg. point of view. 
Need Bill's input here I guess.
They do give instructions & dowels for using the larger dowels in the stock flywheel though. That makes a machine shop money, not SPEC. Still must be a reason, even if it was just that it was designed to fit something else first.
I did end up buying both the clutch & flywheel though. That's another reason why Iam Broke.
Need Bill's input here I guess.
They do give instructions & dowels for using the larger dowels in the stock flywheel though. That makes a machine shop money, not SPEC. Still must be a reason, even if it was just that it was designed to fit something else first.
I did end up buying both the clutch & flywheel though. That's another reason why Iam Broke.
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Joined: 03-05-09
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From: Des Moines, IA
I'm sure the dowels help with shearing force on the fastners along with making sure the alignment is spot on. I have ran a clutch w/o dowels before though when a machine shop neglected to put them back in after resurfacing so I wasnt very worried. That was on a AWD DSM with an ACT 2600 and its still running last I knew after 2 yrs. Don't get me wrong, I do think they serve a purpose... but I'm not launching the space shuttle here.
Should it ever shell out, I'll let you guys know
Should it ever shell out, I'll let you guys know
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Joined: 06-22-09
Posts: 5,989
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From: Kathmandu
No, I meant I took the new parts out and examined them. I have to choose my words more carefully on the internetz.
TO bearing comes Sat so I hope to get it installed next week. Too much for this old man to do on his back in the garage. Haven't done a clutch since the '65 Malibu SS in about 1974.
TO bearing comes Sat so I hope to get it installed next week. Too much for this old man to do on his back in the garage. Haven't done a clutch since the '65 Malibu SS in about 1974.
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