si-thee

is this piston slap?

http://s636.photobucket.com/albums/u...96d0e995-1.mp4

cheers

addi monster

iTrader: (6)

hmmmm its hard to diagnose noises from a video, but that sounds like something towards the small ends(piston slap) get a metal bar and place it where the little end bearings are situated and put your ear on it and have a listen you will hear it if it is, then its out with the lump,.

si-thee

If I go for a drive then come back noise has gone ? If that makes any difference it's coming from back right hand side

addi monster

iTrader: (6)

as the engine warms up the bearings expand a fraction thus no noise, you have two heads on the engine one either side, get a bar and compare the noises,

si-thee

Car has acl bearings does that make any difference? Or can it happen to any?

JohnD

iTrader: (5)

piston slap is usually most audible when opening the throttle and goes as the throttle is closed and the engine decellerates. That noise seemed to be there irrespective. You need to let a technician with Subaru experience have a listen.

JohnD

prodriverules

iTrader: (52)

+1 my forge motor has abit of slap and go's when revved and becomes audible again from 1.5k down to idle and is virtually gone when nice and hot but is very quiet compared to yours mate so as above go see an expert

Shaun

Not conclusive, but yes it sounds "like" piston slap to me.

si-thee

Think I will nip to clinic in the morning

TonyBurns

iTrader: (3)

Si, what year car is it?
97/98 phase 1.5 engines were notorious for piston slap (number 3 i think) as there was an issue with design or something, happened on all the turbo models (except the 22b).
Normally more common with forged pistons as they take longer to warm up and expand.

Tony

rapid.STI

iTrader: (5)

i'll 2nd that!! if car is cold when that video was done then yes i would say its a bit of slap.

wayne.

max137

i have wossner pistons in my ra and has some piston slap on cold but virtually goes away once warm, sounds like its pretty common with forged pistons.

si-thee

car was cold when i did video, took car for a quick run tonight while the jam sandwiches where concentrating on catching hoodies with party poppers, when i got back noise was virtually gone. while engine was nice and warm thought i would drop oil so job for tomorrow now