Going 4 400bhp

iTrader: (2)

I have heard that they do? Is this true as iv notice on when i put my ear right under the hood and give the car a little rev, as the rev cut's out i get a little rattle?

Or is my block just on its way out?

Ash

Jam Performance

iTrader: (3)

yes very normal will be worse when cold

Mus

iTrader: (2)

im not sure about rattle, but piston slap ive heard of

Going 4 400bhp

iTrader: (2)

No it is 100% a rattle, can hear it when car is cold but not at all really when car has warmed up.

Ash

By the way killer have you got a map with your new turbo on yet???

If so let me see

Jam Performance

iTrader: (3)

lol now that would be telling....

Going 4 400bhp

iTrader: (2)

Come on ill show you mine when i get one next week

Fat Boy

To revisit my earlier quote - sound like a skeleton wanking in a biscuit barrel when cold, go quiet when oil (not water) gets to 80C

Very reputable engine builder

Jam Performance

iTrader: (3)

Hasn't been on the rollers yet but I'll take you for a spin in it on sunday

Jam Performance

iTrader: (3)

I've got the same problem too very slappy and rattly till about 80 degrees oil temp

joz8968

iTrader: (13)

One of the world's great analogies!

NXG

Same rattle here, and yes I've been told it is normal (assuming your oil level is right! )

T5OLF

iTrader: (4)

Yes they do, My mate had his engine rebuild by Chy at pennine Subaru and it rattled it's t!ts off, he took it back and was told it's fine, but he did not like the idea of trying to sell it with the rattle so Chy rebuild it with different pistons - for free! now thats service.

Going 4 400bhp

iTrader: (2)

Cool thanks guys that puts my mind at ease

BlooSooby

LMFAO!!!

Mine was built with CP pistons and 1 1/2 thou clearance. Sounds like a friggin' Massey Ferguson when cold but nice and quiet once up to temp.

Also, my tailpipe is a bit sootier than it used to be.....oooooh errrrr!

JohnD

iTrader: (5)

Now that's just plain silly. There's no bone in it. so a skeleton won't have one! Please don't tell me you're a doctor!

JohnD

Normski

They do rattle and different brands will rattle more or less. It's to do with the amounts of the different metals in the alloy of the piston, which changes the thermal expansion rate. And that in general a forged piston will expand more than a cast one, so it must have more clearance to start with.

MarkC

iTrader: (12)

thats normal i have a rebuilt sti v8 shortblock with wossnerr forged pistons in my sti type r and it rattles when cold and is fine when its hot

Fat Boy

You haven't got a bone in yours Well, I did hear you were a bit limp...