04 Timing chain rattle???

[FlipTrac_511]

Well I'm trying to narrow down where this consistent rattling is coming from when I'm acclerating at 2500-3000rpms with a cool engine. I've changed two pullies and recently switched to 91 with (XCal tune) and the noise persists. Some say it's the timing chain while others say it's not. I'm starting to lean towards timing-chain but what else would consistently make a rattling noise at certain rpm ranges? Bad cat-converter? Plugs?



I have an 04 with ~40K miles.

 

[EddieS'04]

Could be the xcal is not handling the timing advance properly. What you are hearing is pinging..

 

[FlipTrac_511]

I was stock, no tunes, when the noise started happening. I went to 91, w/ tune, to verify if it was pinging or not.

 

[Ian Gross]

Sounds like the problem I had it ended up being the timing chain tensioner....maybe where you want to look

 

[FlipTrac_511]

Ian, could you by any chance be talking about the drivebelt tensioner pulley? If so, I've replaced it already.

 

[WXMotorSports DecalsPartsAccs]

It's the timing chain making the noise. Earlier models had a TSB for the issue however, you'll have to look up the TSB for the 2004 model. My 2001 had it bad before I traded it in.

 

[Todd Z]

Could remove the drive belt on an Ice cold engine, Back out of the driveway and go down the block....



It is not recommended but it is a way to rule out any thing that the drive belt is spinning..



Todd Z

 

[FlipTrac_511]

SST, no TSBs for my VIN, according to Alldata anyway.



Thanks Todd, but I don't think I'll chance that.

 

[Ron N]

You might try a good oil filter and heavier oil just for a little bit. This will tell you if iit is inside the engine or not. I may be wrong,But Todd can answer me on that._Ron

 

[Jake Levin]

Flip, I've got the same noise on my '02. I put in a heavier oil and the noise is almost non-existent. The noise comes back after a couple thousand miles on the oil, that's how I know it's time for an oil change...

 

[David Griffith 2]

I have the same issue with my '01 job 1.. I'd love to find out how to fix it.. It's very quiet but now that I know it's there it's all I hear... It only happens in the lower gears..

 

[Todd Z]

Griff, your 01 job 1 IS the motor that is the most effected, there is a kit and many posts with exact instructions on how to replace the tensioners...



Thicker oil can help and is a cheep way to diagnose the issue......



Todd Z