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Old 11-03-2003, 06:44 PM
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timing gear

I have a 78 chevy 350, and i am having a problem with getting my timing gear off of the crank, my when i pulled the gear off my mustang GT it came right off. Well sorry to say i left it there and replaced the cam gear and the chain anyway. The crank gear looked good so i diddnt really worry about it but is there any way that it could cause me a problem in the future, could that be causing me to have a power loss. Is there a special tool that you have to use to get the gear off a chevy motor? Please let me know i am very frustrated with it and worried. Thank u everyone.

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Old 11-03-2003, 06:49 PM
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A gear puller would have got it off. If the teeth were OK and its running fine after reassembly, I wouldn't worry about it. It will be fine.
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Old 11-03-2003, 06:56 PM
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Yep, many say you "Need" to replace the timing chain everytime you change the cam.. I was putting a different cam in my truck and the fella helping me wanted to throw the cam, lifters, and timing chain in the trash.. He said that's where used parts belong?? I disagree
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Old 11-03-2003, 06:56 PM
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Thank you. I have been really worried about it and i pulled it back apart during lunch today just to check on it.. Now i wont have to worry so much
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Old 11-03-2003, 06:56 PM
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If you only replaced the cam gear and chain, you will likely see a shorter chain life than with the changing of both gears.
I would only venture to give an estimate of a 25 percent lifetime loss to the chain and cam gear, a lot would depend on the condition of the crank gear.
That could also last the rest of the lifetime of the engine, either way would only be a guess. Educated of not.
A gear puller should be used for removal of a stubborn like that one, these could be rented inexpensively at a local auto parts store, or even fabricated from a piece of properly bent flat steel and a threaded hole over the crank snout surface to run a bolt through to force the gear off, or to connect a slide hammer to.
I have seen a couple gears though that had to be broken off the crank but those engines were severely abused before they were to be parted out.
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