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Old 03-27-2012, 03:00 PM   #1
jabela
6th Gear Member
 
Join Date: Apr 2007
Location: Toronto, ON, Canada
Posts: 1,281
Rattle from engine on throttle tip in?

Any ideas what that rattle sound is? It only occurs on throttle tip in. I've noticed it happening anywhere between 700-3000 rpm, when I go from zero throttle to a quick increase. I seem to be hearing it more often than before. I used to only hear it when adding throttle at very low rpm, like under 1000rpm under load (like going from coasting to accelerating). My car is an '02 and has 150K KM.
This video is after a long drive with the engine warmed up.
http://www.youtube.com/watch?v=y_dp17LuIDg
You'll hear a rattle when I hit the throttle.
Here's another audio sample
http://www.youtube.com/watch?v=vyH_6ciBAMs

Could it be the VANOS rattling? I already have the VANOS seal repair kit, but not the rattle repair kit.
It doesn't sound like the VANOS rattles that I've heard
http://www.youtube.com/watch?v=HRM7I2nHeMs
http://www.beisansystems.com/procedu..._procedure.htm

Could it be a loose timing chain?
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