Starter shims
Thread Starter
Le Mans Master
Joined: Oct 2007
Posts: 6,001
Likes: 1,742
From: Richmond Kentucky
2025 Corvette of the Year Winner- Modified
2024 C2 of the Year Winner - Modified
2022 Corvette of the Year Finalist -- Modified
2021 C2 of the Year Winner - Modified
2021 C1 of the Year Winner - Modified
2020 Corvette of the Year (stock)
C2 of Year Winner (stock) 2019
2017 C1 of the Year Finalist
Starter shims
How many is too many????????????????
I replaced the L-88 flywheel on my ZL-1 engine with a stock 327 flywheel in order to make it more drivable. Now the starter drive doesn't want to mesh properly. NOTHING else was changed. Starter is a Powermaster. I have added .140 total thickness of shims........then removed ALL shims...................all to no avail.
Any suggestions?
Thanks,
Rex
I replaced the L-88 flywheel on my ZL-1 engine with a stock 327 flywheel in order to make it more drivable. Now the starter drive doesn't want to mesh properly. NOTHING else was changed. Starter is a Powermaster. I have added .140 total thickness of shims........then removed ALL shims...................all to no avail.
Any suggestions?
Thanks,
Rex
Race Director
Joined: May 2006
Posts: 18,692
Likes: 2,572
is the tooth count and diameter of the flywheels the same? How do you go from a BB flywheel to a SB flywheel? Did you check the clearance between the pinion gear tooth point and the flywheel tooth valley, should be able to fit a paper clip in there.
Thread Starter
Le Mans Master
Joined: Oct 2007
Posts: 6,001
Likes: 1,742
From: Richmond Kentucky
2025 Corvette of the Year Winner- Modified
2024 C2 of the Year Winner - Modified
2022 Corvette of the Year Finalist -- Modified
2021 C2 of the Year Winner - Modified
2021 C1 of the Year Winner - Modified
2020 Corvette of the Year (stock)
C2 of Year Winner (stock) 2019
2017 C1 of the Year Finalist
The L-88 flywheel IS the SAME diameter as the 327 stock flywheels, they use the same type of starter.
Thread Starter
Le Mans Master
Joined: Oct 2007
Posts: 6,001
Likes: 1,742
From: Richmond Kentucky
2025 Corvette of the Year Winner- Modified
2024 C2 of the Year Winner - Modified
2022 Corvette of the Year Finalist -- Modified
2021 C2 of the Year Winner - Modified
2021 C1 of the Year Winner - Modified
2020 Corvette of the Year (stock)
C2 of Year Winner (stock) 2019
2017 C1 of the Year Finalist
I'm beginning to think that there is something within the bellhousing that is binding and not allowing the engine to turn. Only items changed were flywheel, a stock 153 tooth, new Sachs clutch disc and diaphragm pressure plate.
Will pull trans and bell tomorrow.........................
Looking forward to it!!!!!!!
Will pull trans and bell tomorrow.........................
Looking forward to it!!!!!!!
Melting Slicks
Joined: Oct 2008
Posts: 2,154
Likes: 69
From: Regina Sk Canada
Get under the car, and pry the bendix, or starter gear back with a screw driver, and mesh it with the flywheel. use a paperclip as distance between where the teeth mesh. Add shimms accordingly. i did this on my 468 with an MSD starter took an hour . its a pain in the ***, but there is no magic number. each situation is different.
Thread Starter
Le Mans Master
Joined: Oct 2007
Posts: 6,001
Likes: 1,742
From: Richmond Kentucky
2025 Corvette of the Year Winner- Modified
2024 C2 of the Year Winner - Modified
2022 Corvette of the Year Finalist -- Modified
2021 C2 of the Year Winner - Modified
2021 C1 of the Year Winner - Modified
2020 Corvette of the Year (stock)
C2 of Year Winner (stock) 2019
2017 C1 of the Year Finalist
The problem is that I used an early flywheel (62-67 type, casting # 3791021), which is too thick and thus rubbed againts the cam tunnel plate on the back of the ZL-1 block. I need the later design, thinner flywheel. I'm not sure when GM changed flywheel designs and went with the thinner one, I'm thinking around 1968 or 69.
Anybody got one?
Anybody got one?
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
2027 Corvette vs The World: Every C8 vs Its Closest Competitor
Joe Kucinski
Safety Car
Joined: Mar 2007
Posts: 3,652
Likes: 49
From: Bridgewater nj
The problem is that I used an early flywheel (62-67 type, casting # 3791021), which is too thick and thus rubbed againts the cam tunnel plate on the back of the ZL-1 block. I need the later design, thinner flywheel. I'm not sure when GM changed flywheel designs and went with the thinner one, I'm thinking around 1968 or 69.
Anybody got one?
Anybody got one?
Melting Slicks
Joined: Aug 2008
Posts: 2,200
Likes: 3
From: Lehigh county Pennsylvania
Especially since the BB is externally weighted and the SB is internally weighted.
