P-1prodrive

just had the car a week,n ive noticed on these cold mornings when i first start it up the engine knocks for about 2 seconds then goes. is this anything to worry about?. cheers for any advise, pete.ooppps forgot to say,its an sti.

P-1prodrive

guess its not a common problem then?.

Butty

iTrader: (2)

Does it sound like a small hammer hitting a metal panel?
Could be anything from a loose heat shield, piston slap to bottom end bearings starting to go.
Any other rattling noises while on the move?

Nick

JohnD

iTrader: (5)

Go to the dealer armed with some possible causes and leave it there overnight so they can start it next morning.
Another possibility is the cambelt tensioner.
JohnD

P-1prodrive

thanks guys ,will go to the dealers next week.it only knocks for a second when first started from cold,doesnt do it for any more than 2 seconds,but sounds deep when it does do it.after the few seconds it stops,and youd be none the wiser that there was a problem, quiet as a mouse!.

powerman1

i have had the same noise on my 03WRX from 6k to present 24k and been back to dealers but its a very difficult one to spot 2 secs and its gone till the next day.i posted on this one and the general feedback i got was it is quite common on 03/04/05 wrx's
powerman

P-1prodrive

brilliant powerman,i had a general feeling it wasnt much to worry about,as it goes so quickly after start up.thanks for your help,and when i go to subarus,if they do find anything,i will be sure to post up n let you know,cheers pete.