ZUKIWORLD Online | Suzuki 4x4 Editorial and Forum
ZUKIWORLD Discussion Forum => Suzuki 4x4 Forum => Topic started by: towforce on January 02, 2012, 12:17:10 PM
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Just installed a new Timing Chain System on my 2002 XL7, H25 and have a rather odd problem.....
The Problem, I have a distinct "rattle" at 2400 to 2500 RPM (seriously.... its that precise!) As best as I can tell the rattle is valve train related.... believe me I have crawled all over this thing looking for some other source of the noise but no luck.
I used the shop manual and I did not find the job difficult so I'm assuming that I did nothing obviously wrong. I admit, it is a pretty deep project but I took my time and no worse anything I have done in the past... that said I may have missed something ?
Here are some other odd facts:
-Rattle is only when warm/hot (tested cold.... no rattle)
-Above and below the problem RPM.... no rattle.
-I did not notice this rattle prior to the timing chain replacement
(but did have the typical raspy/rattle during startup)
-Drivablity is good, runs well, no MIL codes
-For parts, I used Rock Auto aftermarket kit
At this point I'm thinking my mistake is something to do with how I used the full kit. I used, all new chains, all new guides, all new tensioners. I used only one new sprocket from the kit, after checking specs of all the old sprockets and not particularly happy with the quality of the new sprockets I used only the passenger side main cam sprocket.
I would be more then happy to entertain some ideas but rigth now I'm leaning toward some sort of mismatch in the old and new drive components that may be the source of my specific RPM imbalance.
As it stand, I am prepared to pull everything apart and give it another look, but I'm a bit baffled by this problem.
Martin