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: 10,230	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



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