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

 

yes very normal will be worse when cold

 

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

 

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

 

lol now that would be telling....

 

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

 

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

 

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

 

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

 

One of the world's great analogies!

 

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

 

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.

 

Cool thanks guys that puts my mind at ease

 

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!

 

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

 

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.

 

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

 

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