mikv

my 1998 sti has a rebuilt block with cosworth pistons ,its only done 7000 miles and it suffers from piston slap when cold . when warm it sounds sweet and dosent use any oil.
i've been told its normal for cosworth pistons, does anyone know if this is true

drb5

iTrader: (4)

i'm thinking as i have je pistons now, that is quite nrmal for lighter pistons to give a bit of noise of it. i find this is the caes, but as no problems have arose and no det appearing, that all is ok anyways.


hope that answers your question

JohnD

iTrader: (5)

Piston slap when using Cosworth pistons in a Scoob is a known characteristic. As long as it goes away on warming it's not a problem. Warm the engine gently before using boost.
JohnD

StickyMicky

try a search, im sure a few of the biggish names on this board have discussed this (one of the johns im sure of it)