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

drivethechevy · 10-07-2008, 08:16 PM

im new to engines, and i am trying to replace the original timing gears on my 74 350, i pulled the gear attatched to the cam and the chain no problem, but i cant get the crank gear off, i tried the only pronged puller i have to pull the old gear off the crank and it moved a little then my puller busted,
there has to be a better way to pul this gear off
thanks
nate

wyatt earp · 10-07-2008, 08:43 PM

i've had luck taking a rubber headed striking mallet and tapping it back towards the motor then see if the key way will come out. if not then find a bigger gear puller.

drivethechevy · 10-07-2008, 09:27 PM

the keyways i have seen before have been one peice, the keys on my crank are seperate and when i removed the harmonic balancer the first key did not fall off, is that normal?
thanks
nate

harshard · 10-07-2008, 09:56 PM

thats normal but you will probably want to remove the harmonic ballancer key before removing the gear , to be on the safe side.

drivethechevy · 10-07-2008, 11:04 PM

whats the best way to go about removing the keys?
thanks
nate

jsbgump · 10-07-2008, 11:35 PM

I have used a 3 jaw puller to remove the crank gear before

70GMCer · 10-08-2008, 07:24 AM

Some will not agree with this, but since you are not going to use that crank gear anyone, take a steel chisel, and hit between the teeth of that gear a couple times. That cast gear will break right off. Just make sure to put a rag behind that gear to prevent anything from going into the pan. I've been doing it that way for years.

**truckdude239** · 10-08-2008, 07:36 AM

if its not woren real bad i just leave it i've never had any problems

10-07-2008, 08:16 PM	#1
drivethechevy Registered User Join Date: May 2007 Location: Buffalo MN Posts: 606	help im new to engines, and i am trying to replace the original timing gears on my 74 350, i pulled the gear attatched to the cam and the chain no problem, but i cant get the crank gear off, i tried the only pronged puller i have to pull the old gear off the crank and it moved a little then my puller busted, there has to be a better way to pul this gear off thanks nate __________________ Trial and Error, its expensive but its a mistake i most likely wont make again 1971 chevy k10 custom deluxe http://67-72chevytrucks.com/vboard/s...d.php?t=341257 1968 chevy k/10 fleet http://67-72chevytrucks.com/vboard/s...d.php?t=334731 1948 desoto custom coupe fluid drive(family heirloom)

10-07-2008, 08:43 PM	#2
wyatt earp Registered User Join Date: Apr 2007 Location: ohio Posts: 77	Re: help i've had luck taking a rubber headed striking mallet and tapping it back towards the motor then see if the key way will come out. if not then find a bigger gear puller.

10-07-2008, 09:27 PM	#3
drivethechevy Registered User Join Date: May 2007 Location: Buffalo MN Posts: 606	Re: help the keyways i have seen before have been one peice, the keys on my crank are seperate and when i removed the harmonic balancer the first key did not fall off, is that normal? thanks nate __________________ Trial and Error, its expensive but its a mistake i most likely wont make again 1971 chevy k10 custom deluxe http://67-72chevytrucks.com/vboard/s...d.php?t=341257 1968 chevy k/10 fleet http://67-72chevytrucks.com/vboard/s...d.php?t=334731 1948 desoto custom coupe fluid drive(family heirloom) Last edited by drivethechevy; 10-07-2008 at 09:28 PM. Reason: spelling

10-07-2008, 09:56 PM	#4
harshard Registered User Join Date: Aug 2008 Location: Kaufman,Texas Posts: 102	Re: help thats normal but you will probably want to remove the harmonic ballancer key before removing the gear , to be on the safe side.

10-07-2008, 11:04 PM	#5
drivethechevy Registered User Join Date: May 2007 Location: Buffalo MN Posts: 606	Re: help whats the best way to go about removing the keys? thanks nate __________________ Trial and Error, its expensive but its a mistake i most likely wont make again 1971 chevy k10 custom deluxe http://67-72chevytrucks.com/vboard/s...d.php?t=341257 1968 chevy k/10 fleet http://67-72chevytrucks.com/vboard/s...d.php?t=334731 1948 desoto custom coupe fluid drive(family heirloom) Last edited by drivethechevy; 10-07-2008 at 11:04 PM. Reason: spelling

10-07-2008, 11:35 PM	#6
jsbgump Gone Fishing Join Date: Aug 2005 Location: Fort Worth, Texas 76135 Posts: 12,361	Re: help I have used a 3 jaw puller to remove the crank gear before __________________ 68 Chevy Short Fleetside LSX Swap Under Way 3.73 posi 2.5/4 drop Frame of resto has been started 2022 Hyundai Tucson Limited 2019 Chevy Traverse Redline Edition Wifes Ride Build Thread http://67-72chevytrucks.com/vboard/s...=1#post3483616

10-08-2008, 07:24 AM	#7
70GMCer Senior Member Join Date: Apr 2005 Location: Joppa, Maryland Posts: 4,408	Re: help Some will not agree with this, but since you are not going to use that crank gear anyone, take a steel chisel, and hit between the teeth of that gear a couple times. That cast gear will break right off. Just make sure to put a rag behind that gear to prevent anything from going into the pan. I've been doing it that way for years. __________________ 1997 GMC Sierra Ext 1965 Mustang

10-08-2008, 07:36 AM	#8
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,238	Re: help if its not woren real bad i just leave it i've never had any problems __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

Thread Tools
Show Printable Version Email this Page
Display Modes
Switch to Linear Mode Hybrid Mode Switch to Threaded Mode



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.