Will I ever drive this car !! - Team Camaro Tech
Troubleshooting Diagnosing problems done here.

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post #1 of 5 (permalink) Old Oct 6th, 02, 04:26 AM Thread Starter
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I posted a problem with noise from my gear drive not just whine but it sounds like every sound the engine makes is being reverbed through the timing chain cover. Help !! O.K. so I decided to trash the gear drive and I purchaced a Comp high tech double roller. the guy at the speed shop and my buddies said just take off the gear drive components and the brass bushing or spacer behind cam gear and just slap on new gears and chain. Well when installing the top cam gear it barely clears the block and the chain will no way go on it hits right against the block. I noticed that on the block by top of gear the block sticks out (hump)right there where one of the three holes are in the front. Holes have screw in plugs.Another sunny fall day perfect for a cruise and my ride just sits again. HELP !!!
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post #2 of 5 (permalink) Old Oct 6th, 02, 01:11 PM
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Location: Londonderry, NH
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Did they machine the block down for the gear drive or a torrington thrust bearing?

Are you installing the top gear backwards??
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post #3 of 5 (permalink) Old Oct 6th, 02, 02:19 PM Thread Starter
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There are no signs that the block has been milled around the cam. I am going to check with the speed shop that did the work to make sure. I also made sure that I had the alignment mark on the gear facing out. On the back of the cam gear it has a recessed area that fits around the cam which sets it in that much further. I have never had this problem before. Do you have any idea why all the noise from the gear drive. If the idler pin makes contact with the block and the cover can that cause excessive noise other than the whine. I thank you for responding PDQUICK. Tony
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post #4 of 5 (permalink) Old Oct 6th, 02, 03:56 PM
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This is normal with a lot of the newer blocks. The double roller chains will hit on the block right at the top of the middle oil galley. All you have to do it take a die grinder and grind away the block until it clears. It does not take much. Just did one at the shop Saturday morning. I dont know when GM changed the block castings, but almost everyone we have seen lately needs to be "massaged" You can do it with the engine together if you are careful. Have someone hold a shop vac nozzle right up to the carbide bit while you are grinding. Nothing earthshattering...just part of engine building.
Hope this helps,

Bill Koustenis
Advanced Automotive Machine
Waldorf Md
1971 Chevelle "Heavy Chevy" original owner
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post #5 of 5 (permalink) Old Oct 7th, 02, 01:20 PM Thread Starter
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Bill, thank you very much this info makes me feel alot better, I have invested a good amount of money on this engine against my wife's wishes. She doesnt get turned on by a 69 SS camaro like I do. And if this car cant at least go pick up some milk and bread I am going to have to move in with you. I was told today that all the extra noise the gear drive was making may be because of the solid cam and it tranfering the mechanical sound through the idler pin which rides against the timing chain cover and my not have had this extra noise with a hydraulic cam. Does this sound correct to you or just more B.S. anyway the gear drive gets pulled out this weekend. do you think I should use the brass spacer that was behind the gear drive or is it better to just let the double roller cam gear to just bump against the block.The gear seems to have oil grooves cut in it on the block side? When I grind the block I will use masking tape to cover any and all exposed openings so no metal will get into anything. All I have is a dremal tool with a grinding stone or stone for my drill motor do you think either will work? Do i remove the threaded in pipe type plug? And can I grind down to far? Thanks
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