cold knock on start up GC8 STI

[jacsmiley]

sorry guys and gals but i did try to "search function" this topic but still dont have a resolution

i had my first sti gc8 rebuilt and it never knocked when cold

my new cg8 has been rebuilt and has a terrible cold knock and has to fully warm up before the knock goes away! i have blown 3 sti gc8's in my time and this one could be my 4th but im treating it well to make it last

my question is..... is it really "normal" for it to knock this bad? (i know what the bearing knock sounds like having done 2 myself, it sounds quite similar) will it get worse even though im being "nice" to it? or should i start saving some pennys to fix something that may not need to be fixed?

lets face it... we didnt buy our subarus to drive them "nice" all the time.

[Guest boostin]

If it does it when cold, chances are its piston slap.

[jacsmiley]

 boostin said:

If it does it when cold, chances are its piston slap.

yeah i know what it is but no one says that it will eventually f-out or weather its doing damage, weather it should be replaced before it does damage to other parts.

i do know that it is incorrect matching of the piston and even subaru got it wrong from the factory but still...

[off2harrys]

when i got mine rebuilt with forged pistons it sounded like a tractor when cold,eventually it gets quieter but theres still a slight knock,which apparently is normal

[jacsmiley]

 off2harrys said:

when i got mine rebuilt with forged pistons it sounded like a tractor when cold,eventually it gets quieter but theres still a slight knock,which apparently is normal

haha! making me feel a bit better cheers

[Guest boostin]

You wanna hear ReubenH's engine, even when hot!! Its got uncoated forgies and it sounds like a big end!!