legacycentral bbs

here is what your piston looks like when it slaps for a while:

Damn... Is this a more severe case of the infamous "piston slap," or something a bit more serious (wrist pin troubles)? My wife's '99 impreza makes a hell of a racket until the motor warms up... I tell her not to drive it until its idled for 5 mins or so.

fishbone79 wrote:Damn... Is this a more severe case of the infamous "piston slap," or something a bit more serious (wrist pin troubles)? My wife's '99 impreza makes a hell of a racket until the motor warms up... I tell her not to drive it until its idled for 5 mins or so.

the infamous piston slap.

Thats not a factory piston is it.I know most aftermarket pistons dont ahve the wrist pin offset...related?

gijonas wrote:Thats not a factory piston is it.I know most aftermarket pistons dont ahve the wrist pin offset...related?

both OE parts, just one is smoked.

So is that what makes the car sound like a lawnmower? The ticking noise for a few min while warming up?

Snowolf2 wrote:So is that what makes the car sound like a lawnmower? The ticking noise for a few min while warming up?

nope that's your HLA's

pardon my lack of knowledge... but whats the HLA?

Hydralic lift adjuster. it's in the tip of your rocker arm (EJ22T), and if it doesn't "pump up" it'll tick until it does. quite common. I had to replace 4 in mine once. all intake ones in right side.

Wiseco's have offset pins, but I can't speak for other makes.







Piston slap, meh. Welcome to Subaru's. My built motor is quieter than most factory engines. That doesn't mean a slappy motor won't wive you another 100k. I friend of mine's 96 2.2 Legacy has perma-slap on one piston. He beats the thing like it owes him money, and has got him home for a few years.