Installing 9 position keyway sprocket on crankshaft ???
#922287
02/06/11 02:24 PM
02/06/11 02:24 PM
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Joined: Jul 2005
Posts: 1,301
Penna
70satelliteguy
OP
pro stock
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OP
pro stock
Joined: Jul 2005
Posts: 1,301
Penna
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I am installing a new Rollmaster timing chain and sprocket(s) on my 440. It was not very easy to remove the old Rollmaster bottom sprocket off the crank. I had to tap it while turning the crank for quite a while before it finally worked loose and came off.  Are these a press on type or should it go on and off fairly easy? How do you guys get these things on and off??? Thanks Mike 
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Re: Installing 9 position keyway sprocket on crankshaft ???
[Re: 70satelliteguy]
#922290
02/06/11 06:02 PM
02/06/11 06:02 PM
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Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines
master
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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You SHOULD need a puller to get the gear off if it and the crank are sized properly. You do not want a loose timing gear as it causes unnecessary harmonics and un-even loading on the crank snout. The cause of many snout failures, often blamed on something else.
You should have to tap it on slightly to install it, and need a puller to remove it.
RIP Monte Smith
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Re: Installing 9 position keyway sprocket on crankshaft ???
[Re: 70satelliteguy]
#922292
02/06/11 06:04 PM
02/06/11 06:04 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
Thanks for the reply Andy!!!
Do you mean a burr on the crank or the sprocket? How hard is it normally to get these things on and the crankshaft? I thought it would be pretty easy ! 
Mike
They normally slide on and off... no press at all...
sometimes the snout of the crank can be a slight bit
oversize and the gear could be undersized so the stack
up COULD be at the max... could check the snout and
gear with a mic or even a set of calipers to see
where everything is at
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Re: Installing 9 position keyway sprocket on crankshaft ???
[Re: 70satelliteguy]
#922293
02/06/11 06:05 PM
02/06/11 06:05 PM
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Joined: May 2005
Posts: 6,446
NJ-USA
HPMike
master
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master
Joined: May 2005
Posts: 6,446
NJ-USA
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Quote:
Thanks for the reply Andy!!!
Do you mean a burr on the crank or the sprocket? How hard is it normally to get these things on and the crankshaft? I thought it would be pretty easy !
Mike
Depending on the crank mfg, they can vary from a light slip fit to a slight press fit. I use a gear puller, which is the proper way to remove it, but you can also have some success "warming" the gear with a propane torch. Don't go crazy, just a little heat will get it done.
What Andy is referring to, I believe, is that there are burrs that form on the keyway slots of the gear that will cause some issues with fitment. You can dress those down with a small file.
FWIW, I'd rather have a gear that is a slightly tighter fit than loose. 
MB
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Re: Installing 9 position keyway sprocket on crankshaft ???
[Re: HPMike]
#922294
02/06/11 07:40 PM
02/06/11 07:40 PM
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Joined: Dec 2009
Posts: 1,074
detroit, mi
POS Dakota
super stock
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super stock
Joined: Dec 2009
Posts: 1,074
detroit, mi
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Quote:
Quote:
Thanks for the reply Andy!!!
Do you mean a burr on the crank or the sprocket? How hard is it normally to get these things on and the crankshaft? I thought it would be pretty easy !
Mike
Depending on the crank mfg, they can vary from a light slip fit to a slight press fit. I use a gear puller, which is the proper way to remove it, but you can also have some success "warming" the gear with a propane torch. Don't go crazy, just a little heat will get it done.
What Andy is referring to, I believe, is that there are burrs that form on the keyway slots of the gear that will cause some issues with fitment. You can dress those down with a small file.
FWIW, I'd rather have a gear that is a slightly tighter fit than loose.
MB
I heat the gear to about 250 degrees in the oven and it slides right on. 
I use a puller to remove it.
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