jtanner

iTrader: (3)

Hi,

Recently ive noticed that my car (1997 wrx sti - had new engine almost a year ago & is on about 20k) sounds like its tapping / knocking when the car first starts, its not majorly loud and to be honest i didnt really notice it till my dad mentioned it once when he moved my car one day.

Now i can hear it and im curious. The noise stops after a few mins once the oil starts to get hot. Last oil change was probs about 5000 miles ago so i know thats overdue & i intend to get that done, but im curious if anyone might have a heads up? Or could it be a case of dirty oil kinda thing? (my mate told me i really should do the oil every 3000 - 4000 as its about 320-350bhp, so could this be a reason?)

Thanks in advance

banny sti

iTrader: (68)

Your car has piston slap, this is common for the phase 1.5 (MY97-98) engines and as it disappears once the engine warms up you have nothing to worry about.

Banny

jtanner

iTrader: (3)

Hi Banny, thanks for the info

legacytt

yeah sounds like piston slap my legacy does it till warmed up with mine having the forged piston and crank then its really quiet for a subaru compared to other imprezas and the like.

dj219957

mine does this. if it goes when warm then its noting to worry about.