Flexplate removal help - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Spoof · 05-11-2002, 07:02 PM

None of my three chevy truck books covers flexplate or flywheel removal, so I assumed it would be simple. Dammned if I can remove the one on my 307. After removing all the bolts it will move sideways but not off the crank shaft. Is there a trick to it? I retreated rather than risk damaging it but I needs to come off tomorrow. The original service manual instructions are "remove flywheel" lol
Maybe there's a puller?

**CPNE** · 05-11-2002, 07:15 PM

It's a tight fit but should come off without undue force. No puller needed that I'm aware of.

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Jeff Jesseman
Cheyenne Parts Northeast
Franconia, NH

67 Chevy SWB Fleetside
70 GMC Burb 1/2 ton 2wd
72 Chevy Burb 3/4 ton 4x4

Parts bought and sold

*Fast68Chevy* · 05-11-2002, 07:55 PM

pull harder, just dont get hurt. sometimes flywheels are on pretty tight or hard ot reinstall, but flexplates always are easy

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Randy- Lincoln, IL
randy@ccaonline.com 2177353230
*many GM parts bought, traded, or sold -am parting out: '81 Cutlass Supreme Brougham

current fleet: -71 C-10 350/CH465/3.07- basketcase, #1
-90 Cavalier 2.2L sky blue, a driver
-84 Z28 5.0L/700R4/3.73 daily driver
-84 Firebird/SE 2.8L/T-5/3.73/engine bad, project #2
-82 purple Trans Am, project #3
*Paint is overrated*
© RSS Enterprises 2000

O'l Buck · 05-11-2002, 09:51 PM

flexplates are a pretty snug fit, you just have to wiggle and pull at the same time and they usually come off pretty easy, sometimes, if there is a rust ring around the flexplate on the crankshaft, you have to uses some emery cloth and sand the rust off. I have had them stuck tight enough i couldn't wiggle them at all, just whap it with a dead blow hammer or a bfh and a wood block, it will come off sooner or later, don't use a prybar or something on it or you will take a chance of bending it.

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Ol' Buck: '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84
ralleys and 31/10.5s

Angel girl: 67 Cutlass convertible
330, 3spd stick

Greener: 90 GMC Jimmy
350/auto
Chad Stephens
Orleans,NE

no name yet: 72 442 under serious construction
my site:
http://communities.msn.com/Beastonabudget/homepage

bigjimzlll · 05-12-2002, 01:14 AM

try some liquid wrench or wd40 to free up the rust

tom hand · 05-12-2002, 08:16 AM

I think Ol'buck has the correct answer for your problem. I think you will find rust is the problem and sandpaper is the answer. Just keep sanding the center part that sticks thru the flexplate till it is nice and shiney, then it should pull right off.

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72 GMC Sierra SWB almost finished---- 84 Softail
Olive Branch MS

Mike C · 05-12-2002, 08:46 AM

I agree with the other guys. I'd try a wire brush on an electric drill to clean the end of the crank where the flexplate pilots, followed by some WD40. Then wedge a piece of wood on one side under the flexplate and pry from the opposite side levering the flexplate against the wood and it should pop right off.

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70 GMC 3/4 ton Sierra Grande 402/TH400
72 Jimmy 4WD 4spd 4" & 35's
64 Corvette Coupe
68 Camaro 'vert TPI & TH700
69 Z/28 355 12.6's @110
72 Datsun 240Z-ol' reliable

69 longhorn · 05-12-2002, 10:52 AM

Just remember that as already posted,it is very easy to damage a flex plate.......I think I would clean the rust ring,& shoot a little "goose juice" on the crank,then try to wiggle it off..........69longhorn.

Spoof · 05-12-2002, 02:33 PM

Thanks for all the good tips. Wire-brushed, sanded and lubed and it eventually worked off by hand. A great spring day to be out working on it too.

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71 GMC 2500 Custom Camper
71 GMC Suburban 1500 Super Custom
71 Chevrolet 1500 Donor
http://www.able-bravo.com

05-11-2002, 09:51 PM	#4
O'l Buck Recovering Truck Driver Join Date: Mar 2002 Location: Orleans, NE USA Posts: 1,883	flexplates are a pretty snug fit, you just have to wiggle and pull at the same time and they usually come off pretty easy, sometimes, if there is a rust ring around the flexplate on the crankshaft, you have to uses some emery cloth and sand the rust off. I have had them stuck tight enough i couldn't wiggle them at all, just whap it with a dead blow hammer or a bfh and a wood block, it will come off sooner or later, don't use a prybar or something on it or you will take a chance of bending it. ------------------ Ol' Buck: '72 Chevy 1/2T 4x4 shortbox stepside 350/350auto on '84 ralleys and 31/10.5s Angel girl: 67 Cutlass convertible 330, 3spd stick Greener: 90 GMC Jimmy 350/auto Chad Stephens Orleans,NE no name yet: 72 442 under serious construction my site: http://communities.msn.com/Beastonabudget/homepage __________________ 67 K-20 350, SM465, Eaton rear, 4.56 no spin option 00 Dodge 2500 4x4, 24V cummins, 5 speed Chad South Central Nebraska

05-12-2002, 01:14 AM	#5
bigjimzlll Senior Member Join Date: Dec 2001 Location: Redding,CA...USA Posts: 4,736	try some liquid wrench or wd40 to free up the rust __________________ It's called "drag racing" if they called it "tic..tic..WHAM!..BANG! F*&K!!!", they'd have to keep the magazines under the counter with the other men's publications click the clicky to join the site.... http://67-72chevytrucks.com/vboard/payments.php 67 lwb..first hotrod in 25 years..540 best ET is 9.45 @ 141.44 Anderson,CA

05-12-2002, 08:16 AM	#6
tom hand CCRider Join Date: Feb 2000 Location: Olive Branch,MS,USA Posts: 2,232	I think Ol'buck has the correct answer for your problem. I think you will find rust is the problem and sandpaper is the answer. Just keep sanding the center part that sticks thru the flexplate till it is nice and shiney, then it should pull right off. ------------------ 72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS __________________ 72 GMC Sierra SWB almost finished---- 84 Softail Olive Branch MS

05-12-2002, 08:46 AM	#7
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,723	I agree with the other guys. I'd try a wire brush on an electric drill to clean the end of the crank where the flexplate pilots, followed by some WD40. Then wedge a piece of wood on one side under the flexplate and pry from the opposite side levering the flexplate against the wood and it should pop right off. ------------------ 70 GMC 3/4 ton Sierra Grande 402/TH400 72 Jimmy 4WD 4spd 4" & 35's 64 Corvette Coupe 68 Camaro 'vert TPI & TH700 69 Z/28 355 12.6's @110 72 Datsun 240Z-ol' reliable __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

05-12-2002, 10:52 AM	#8
69 longhorn Registered User Join Date: Aug 2001 Location: rock island,il,usa Posts: 5,382	Just remember that as already posted,it is very easy to damage a flex plate.......I think I would clean the rust ring,& shoot a little "goose juice" on the crank,then try to wiggle it off..........69longhorn. __________________ http://community.webshots.com/user/hotrodhorn

05-11-2002, 07:02 PM	#1
Spoof Registered User Join Date: Jul 2000 Location: Victoria,BC, Canada Posts: 1,300	Flexplate removal help None of my three chevy truck books covers flexplate or flywheel removal, so I assumed it would be simple. Dammned if I can remove the one on my 307. After removing all the bolts it will move sideways but not off the crank shaft. Is there a trick to it? I retreated rather than risk damaging it but I needs to come off tomorrow. The original service manual instructions are "remove flywheel" lol Maybe there's a puller? __________________ 71 GMC 1500 LWB

05-11-2002, 07:15 PM	#2
CPNE Resident Curmudgeon Join Date: Dec 1999 Location: NH Posts: 6,664	It's a tight fit but should come off without undue force. No puller needed that I'm aware of. ------------------ Jeff Jesseman Cheyenne Parts Northeast Franconia, NH 67 Chevy SWB Fleetside 70 GMC Burb 1/2 ton 2wd 72 Chevy Burb 3/4 ton 4x4 Parts bought and sold __________________ Currently on or near the homestead: 67 Chevy SWB 2WD stepside 350/3 on tree (Pat's) 67 GMC SWB 2WD Fleet 402/auto (Brian's under construction) 67 Chevy 3/4 ton 2WD 402/auto (Business Hauler) 67 Chevy 1 ton dually 2WD 396/4 speed (Former business hauler, Needs TLC) 68 Chevy 1/2 ton Suburban 2WD 250 six/3 on tree (Brian's Needs TLC) 70 Chevy 3/4 ton 4WD 350/4 speed (Pat's - Disguised as a 68 GMC) 71 Chevy SWB stepside (Crushed by tree - parts donor) 72 Chevy 3/4 ton 4WD (Parts donor) 72 Chevy 3/4 ton 4WD Suburban (Parts Donor) 72 GMC 3/4 ton 4WD 292 six/4 speed (Mine - Disguised as a 67 GMC) 81 GMC 4WD Dually Dump Body 350/4 speed (Business Hauler) 82 Camaro Z/28 355/Super T-10 (Pat's toy) 93 Caprice 9C1 (Brian's Cop Car) 02 Toyota Camry (Reliable but a souless steel and plastic hulk) 2011 2SS RS Camaro M6 Factory Hurst Shifter Maybe I need to sell some of this crap Yet another Bozo with a sawz-all

05-11-2002, 07:55 PM	#3
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	pull harder, just dont get hurt. sometimes flywheels are on pretty tight or hard ot reinstall, but flexplates always are easy ------------------ Randy- Lincoln, IL randy@ccaonline.com 2177353230 many GM parts bought, traded, or sold -am parting out: '81 Cutlass Supreme Brougham current fleet: -71 C-10 350/CH465/3.07- basketcase, #1 -90 Cavalier 2.2L sky blue, a driver -84 Z28 5.0L/700R4/3.73 daily driver -84 Firebird/SE 2.8L/T-5/3.73/engine bad, project #2 -82 purple Trans Am, project #3 Paint is overrated* © RSS Enterprises 2000

05-12-2002, 02:33 PM	#9
Spoof Registered User Join Date: Jul 2000 Location: Victoria,BC, Canada Posts: 1,300	Thanks for all the good tips. Wire-brushed, sanded and lubed and it eventually worked off by hand. A great spring day to be out working on it too. ------------------ 71 GMC 2500 Custom Camper 71 GMC Suburban 1500 Super Custom 71 Chevrolet 1500 Donor http://www.able-bravo.com __________________ 71 GMC 1500 LWB



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