Timing gear on inline 6 - Chevelle Tech
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post #1 of 5 (permalink) Old May 7th, 13, 6:45 PM Thread Starter
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Timing gear on inline 6

Have a 1967 chevelle with an inline 6. Was driving on freeway and car just died. Shop just called back and said they need to replace one of the timing gears. I asked the guy there, since you are replacing timing gear, is there anything else they should check? He said he'd check the rubber on the harmonic balancers.

Can you think of anything else?
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post #2 of 5 (permalink) Old May 8th, 13, 2:10 AM
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RANDY
 
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Re: Timing gear on inline 6

Is he replacing the stock wooden gear with another or upgrading??

Thanks
Randy
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post #3 of 5 (permalink) Old May 8th, 13, 9:14 AM
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Tom
 
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Re: Timing gear on inline 6

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Originally Posted by GLHS60 View Post
Is he replacing the stock wooden gear with another or upgrading??

Thanks
Randy
The stocker is a phenolic material isn't it? I'd replace with a performance gear, check the balancer and drive it for another 200K, lol. Those inline sixes will run forever!
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post #4 of 5 (permalink) Old May 8th, 13, 12:34 PM
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Re: Timing gear on inline 6

Quote:
Originally Posted by BigTime_ View Post
Have a 1967 chevelle with an inline 6. Was driving on freeway and car just died. Shop just called back and said they need to replace one of the timing gears. I asked the guy there, since you are replacing timing gear, is there anything else they should check? He said he'd check the rubber on the harmonic balancers.

Can you think of anything else?
The factory OEM cam gear is a "fiber" construction, using a steel center hub.

The following info will be important to the shop doing the install, they MAY already be aware, but if not, they need to follow this procedure closely.

When replacing this "fiber" gear (Cloyes part#2542) you must press it in place on the cam. This is not an easy task in the vehicle with keeping the timing marks aligned.

You're other option is the aluminum cam gear (Cloyes part #2524), this the one we used years ago for all the Chevy 6 cyl's we built. This must NOT be pressed into position, it MUST be pre-heated and installed. When done properly, it will "slide" onto the cam by hand. Again, it's tough to keep the timing marks correct during the procedure!

The crank gears are all the same regardless of the cam gear material! There is a retainer-plate and bolts to hold the cam in the block, but this has no effect on the cam gear!

Thanks, Gary in N.Y.

P.S. There is no factory "retainer" to hold these gears in place, if you attempt to "press" that alumnium gear onto the cam it will eventually find it's way off. On the "high-end" 6's we did we would incorporate our own cam bolt and washer to hold the gears on. This is by far the best method, however, there isn't much room between the bolt head and the t/cover.
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post #5 of 5 (permalink) Old May 8th, 13, 7:48 PM Thread Starter
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Re: Timing gear on inline 6

Thanks for the feedback!
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