Flywheel installation question
Thread Starter
Le Mans Master
Joined: Dec 2002
Posts: 7,981
Likes: 36
From: Piedmont, SC Currently Own: 99 Nassau blue FRC. Previously Owned: 84,95,98 Indy Pace,01 Z06
Flywheel installation question
I will be installing a flywheel with my textralia clutch and I didn't mark the original place of the flywheel. The manual states the flywheel must be installed in the exact position as removed. Does it matter or what does this imply?
TIA
-JAson
TIA
-JAson
Tech Contributor
Joined: May 2008
Posts: 2,843
Likes: 16
From: Howell Michigan
St. Jude Donor '09-'10-'11
Look at the outer diameter of the flywheel. You will see a series of symmetrically drilled front to back through holes near the starter ring gear. If there are no weights (pin pushed into one or more of these holes) then you have no worries. It would still be a good idea to have the new flywheel and pressure plate check for net zero balance as an assembly before installing.
If you find that there are balance weights in one or more holes you might have an issue on your hands. Odds are you won’t find any weights. Let us know what you find.
Hope the clutch change goes well for you!
Drifting
Joined: Nov 2001
Posts: 1,348
Likes: 25
From: STL Mo
I could be wrong "so please anyone chime in" but reguardless of weights or not there is a extra hole on the flywheel and crank between the bolt pattern that line up so that the flywheel only goes on one way, you should have the new setup matched to the specs of the old at a shop that does balanciing if you indeed have weights in the flywheel. Good Luck
Thread Starter
Le Mans Master
Joined: Dec 2002
Posts: 7,981
Likes: 36
From: Piedmont, SC Currently Own: 99 Nassau blue FRC. Previously Owned: 84,95,98 Indy Pace,01 Z06
Thanks guys! I will look at the flywheel tomorrow and see if there are any weights present. I don't recall seeing any.
Team Owner
Joined: Mar 1999
Posts: 22,025
Likes: 192
From: At the beach in little Rhody
The TEX is digitally zero balanced so it is unlikely to be an issue. That being said, I seem to recall the extra hole mentioned by Rich in his post above. Make sure the face of the crankshaft is clean and free of any rust. Use a small wire brush and clean it good to ensure the flywheel sits flat on the crank.
Drifting
Joined: Nov 2001
Posts: 1,348
Likes: 25
From: STL Mo
I will be doing mine again since my car indeed had the weight added to the flywheel. Ive had mine apart twice due to a vibration issue with my flywheel. I even had it balanced but Im thinking the shop might have not done it correctly or something. Anyhow Im doing it again here in a few weeks and am going to have it checked again and see if its out a spec to my old setup. What a PIA, I hope you have better luck then I did. 
Thread Starter
Le Mans Master
Joined: Dec 2002
Posts: 7,981
Likes: 36
From: Piedmont, SC Currently Own: 99 Nassau blue FRC. Previously Owned: 84,95,98 Indy Pace,01 Z06
Ok guys here is what I found in regards to my old flywheel and the one that came with this Tex clutch which is also a factory GM flywheel or so it appears to be. Notice in the factory flywheel there are three weights. On the flywheel that came with the tex clutch it has two weights. I did buy the tex clutch used as it had low miles. It was originally on a '04 Z06. Now on to the pics:
Factory flywheel that was on my '01 Z06 (3 weights)
Factory pressure plate from '01 Z06
Flywheel that came with Textralia OZ700 clutch (2 weights)
How do I go about installing this in regards to the weights issue?
TIA
-Jason
Factory flywheel that was on my '01 Z06 (3 weights)
Factory pressure plate from '01 Z06
Flywheel that came with Textralia OZ700 clutch (2 weights)
How do I go about installing this in regards to the weights issue?
TIA
-Jason
Drifting
Joined: Jan 2008
Posts: 1,722
Likes: 138
From: Florida
St. Jude Donor '09
The shop manual addresses this in the engine mechanical section, within the engine flywheel removal procedure (pg 6-215 of the 01 manual).
The flywheel does not use a locating pin for alignment, you must match mark the flywheel to the crank shaft hub prior to removing the flywheel. If there are any weights on the original flywheel, they must be removed and transferred to the new flywheel in the same location.
The flywheel does not use a locating pin for alignment, you must match mark the flywheel to the crank shaft hub prior to removing the flywheel. If there are any weights on the original flywheel, they must be removed and transferred to the new flywheel in the same location.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
10 Most Common Corvette Problems of the Last 20 Years!
Joe Kucinski
5 MOST and 5 LEAST Popular Corvette Model Years in History!
Joe Kucinski
2027 Corvette Buyer's Guide: Everything You Need to Know!
Joe Kucinski
10 Things C8 Corvette Owners Hate (But Won't Tell You)
Joe Kucinski
10 Best Corvettes Coming to Barrett-Jackson Palm Beach 2026!
Brett Foote
Every Corvette Grand Sport Explained! (C2, C4, C6, C7, & C8)
Joe Kucinski
Grand Sport & Grand Sport X Launch Alongside All-New 535hp LS6 V8!
Michael S. Palmer
5 Reasons Bad Drivers Crash & 5 Ways to Avoid a Costly Mistake!
Joe Kucinski
7 Bolt-On Upgrades From Extreme Online Store to Level Up Your C6 Corvette
Pouria Savadkouei
Thread Starter
Le Mans Master
Joined: Dec 2002
Posts: 7,981
Likes: 36
From: Piedmont, SC Currently Own: 99 Nassau blue FRC. Previously Owned: 84,95,98 Indy Pace,01 Z06
The shop manual addresses this in the engine mechanical section, within the engine flywheel removal procedure (pg 6-215 of the 01 manual).
The flywheel does not use a locating pin for alignment, you must match mark the flywheel to the crank shaft hub prior to removing the flywheel. If there are any weights on the original flywheel, they must be removed and transferred to the new flywheel in the same location.
The flywheel does not use a locating pin for alignment, you must match mark the flywheel to the crank shaft hub prior to removing the flywheel. If there are any weights on the original flywheel, they must be removed and transferred to the new flywheel in the same location.
Drifting
Joined: Jan 2008
Posts: 1,722
Likes: 138
From: Florida
St. Jude Donor '09
Mine left a faint imprint of the flywheel flange face on the crankshaft hub when removed. It was relatively easy to see how it should be re-installed even without the match mark.
Thread Starter
Le Mans Master
Joined: Dec 2002
Posts: 7,981
Likes: 36
From: Piedmont, SC Currently Own: 99 Nassau blue FRC. Previously Owned: 84,95,98 Indy Pace,01 Z06
Thanks, I will take a look tomorrow. Now since both flywheels are the same (GM) can I just put the one that was originally on the car back on and not transfer the weights? I'm just wondering if I switch the weights over to the other flywheel, what keeps the weights from slinging out, etc.? The factory flywheel seems to have some hotspots on it, while the other one that came with the Tex looks pretty clean.
Drifting
Joined: Jan 2008
Posts: 1,722
Likes: 138
From: Florida
St. Jude Donor '09
The shop manual states that if the pressure plate is going to be replaced, the flywheel must be replaced along with it.
My flywheel was in very good condition, it had no hot spots. I took it to work and put it on a lathe, did a run-out on it and it ran true. I cleaned up the friction surface with a scotch bright pad and re-used it and have had no issues. I still have the flywheel that came with the clutch kit for future use.
If your's has hot spots on it, you should at least consider taking it to a machine shop and having it re-surfaced.
Since I re-used my original flywheel I did not remove the weights, I don't know what holds them in, I'm assumings they are either press-fit or threaded?
My flywheel was in very good condition, it had no hot spots. I took it to work and put it on a lathe, did a run-out on it and it ran true. I cleaned up the friction surface with a scotch bright pad and re-used it and have had no issues. I still have the flywheel that came with the clutch kit for future use.
If your's has hot spots on it, you should at least consider taking it to a machine shop and having it re-surfaced.
Since I re-used my original flywheel I did not remove the weights, I don't know what holds them in, I'm assumings they are either press-fit or threaded?
Le Mans Master
Joined: Sep 2003
Posts: 6,253
Likes: 222
From: Farmington CT
Cruise-In VII Veteran
1. EVERY single tex I installed had a NON-GM FW???!!!!(big question here?)
2. As mentioned, there is a hole in the crank AND FW to align on install, screw marking it.
3. I always bought NEW GM FW bolts w/ the blue goop on them, or use loctite, possible to puke oil thru the FW bolt holes if not sealed
2. As mentioned, there is a hole in the crank AND FW to align on install, screw marking it.
3. I always bought NEW GM FW bolts w/ the blue goop on them, or use loctite, possible to puke oil thru the FW bolt holes if not sealed
Thread Starter
Le Mans Master
Joined: Dec 2002
Posts: 7,981
Likes: 36
From: Piedmont, SC Currently Own: 99 Nassau blue FRC. Previously Owned: 84,95,98 Indy Pace,01 Z06
1. EVERY single tex I installed had a NON-GM FW???!!!!(big question here?)
2. As mentioned, there is a hole in the crank AND FW to align on install, screw marking it.
3. I always bought NEW GM FW bolts w/ the blue goop on them, or use loctite, possible to puke oil thru the FW bolt holes if not sealed
2. As mentioned, there is a hole in the crank AND FW to align on install, screw marking it.
3. I always bought NEW GM FW bolts w/ the blue goop on them, or use loctite, possible to puke oil thru the FW bolt holes if not sealed
Thanks
