Hi guys,
just rebuilt my 99uk turbo impreza and all is good, im going to take it for its mot but just wondering about the nock that only happends at start up its not bad and after 5 mins goes away completly, is this anything to waorry about she runs fine but just want some advise

thanks

nath

 

who rebuilt it? doesnt sound good....

 

I did when i say rebuild all i did is replace pistons and piston rings and gaskets etc, it sounds like injectors and i had water in my fuel just wondering if this could mess the injectors up ?

 

Did you rebuild using forged pistons per chance?

 

No standard uk 2lt turbo pistons

 

Damn it.

'Cause the symptoms you describe does sound like piston slap... which is normally nothing to worry about if the pistons were forged.

I suppose it still could be piston slap though...

 

So does this mean that if i give it beanz its gona go pop lo l

 

I think that you are right joz8968 been reading and i have all the causes pointing to piston slap at last i can sleep tonight lol

 

Any chance of sending a sound clip (cameraphone vid) of the noise?

I don't think it's bottom end, as it wouldn't go away and would get louder with revs, etc...... then it get progressively worse in a short amount of time, then bang.

 

i will try but shes all warmed up atm so when she cools down i will get a video for you

 

+1 on piston slap

 

+2 for piston slap - mine is only bad in winter though and as it summer now yours could be even worse come winter