Always when I start my car up for the first time or when its had enough time to cool down (like 30 mins in 50 degree weather) I get a kn0ocking noise for like 2 seconds then no more. The car then runs SMOOTH. Any ideas.

ASlso this is an EK with a B16A2 with ITR valves and valvetrain, ITR IM, and 11.3:1 CR. Also timing is set at about 18. Also I think it makes that noise at 16.

 

hey, any symptoms of where the knocking noise might be coming from?
is it near starter.......tranny, inside the engine?
details details

 

mine makes that noise too,

stock B16A with K&N pod filter.

i think it sounds like a'knock' ie pre-detonation.

not sure why, but cause it only happens at start-up, i never really thought much of it...

t..

 

its sound from the driver side.....near the timing belt area. My belt looks STRAIGHT on the alt. Also I noticed that the belt (with the cam gear cover off) has a slight flexing (as in the belt sways/waves) of about 1/5 a cm. Is this normal....or should I maybe try and tighten it up. Hmmmmm.........

 

if its a hard metal sound there is a 100% chance it is a main bearing. when you first start your car you have no oil pressure. when there is no lubrication you can hear your knocking thats a rob bearing.

 

I just replaced the bearings. Its like if you tap on wood lightly.......Ill check the bearing when i put in my new motor.

 

What kind of pistons are they? With my experience JE's make lots of noise on a cold startup....almost like detonation, but it's piston slap.

 

they are the stock PR3's......