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I just went through this whole thing. make a long story short, my hopes of replacing the upper chain and tensioner and removing the guides to fix my timing chain noise were false. My lower tensioner had failed and wasnt pushing the guide into the chain to pull out slack. This, as you can imagine, caused a shitload of terrible noise. There was so much slack i was surprised the chain didnt jump teeth on the crank/drive gear.
I've since replaced the entire timing chain set with a kit from S.A. Gear and the car has more power than ive felt in any stock S13 and is completely quiet. In fact its so quiet its difficult to tell it's running at idle. When setting the timing advance, the marks were dead still. The components S.A. provides are of a "revised" style. They include a new top-plate for between the cam gears but I did not use it.
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