Timing Chain
Postmaster
Joined: Mar 2002
Posts: 3,545
Likes: 4
From: Coal Region
mine has the composite helical cut gears. the older ones i belives did use the steel gears and switched to the composite because they were quieter. but yes, they are all good ol, never breakin a chain/belt, gear drivin cam gear.
Posting Guru
Joined: Dec 1999
Posts: 1,903
Likes: 1
From: Copley, OH
Originally posted by Silver Streak
The old fine tooth gears with straight up timing will bolt right on the EFI engines won't they?
The old fine tooth gears with straight up timing will bolt right on the EFI engines won't they?
The other issue is that the phenolic gears are not up to handling the increased valve train loads from aftermarket cams, so a cam change must include a gear change.
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Junior User
Joined: Dec 2002
Posts: 90
Likes: 0
From: Western IL
I don't know about the EFI engines, but I know the steel gears will fit where the fiber gears came off. I wouldn't think that having steel gears would make enough vibration to mess with the knock sensor, but I could be wrong.
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Junior User
Joined: Feb 2003
Posts: 72
Likes: 0
From: redding, ca.
timing gear
About six months ago my fiber timing gear exploded and left my truck down for three weeks. The shop that fixed it said the cam and lifters were worn out and needed to be replaced. (Had that knocking diesel sound.) I had the option of steel or fiber gears and decided to use the fiber. The shop said the cam and lifters may have caused the timing gear to fail. Not quite sure how but was about a $1000 shop bill. Now the truck seems slower than it did before. Wish I went with a better cam than stock. maybe the steel gears would have been a better choice but too late now. I think they were close to the same price.