Is My Engine Knocking?

[J_R32]

Hey guys,

long story cut short was checking timing on my rb20det (auto 85000km, cat back exhaust and pod) and when it warmed up and we reved it to approx 2000rpm, we heard a knocking sound. the noise doesnt get louder as the engine revs climb (took it to approx 5000 rpm) the knocking sound seems to "disappear" at high rpm but i am thinking that could be just engine noise taking over. Is my bearings in my bottom end gone? or is my problem just valve shims?

it should be noted that my car does make a knocking sound for about 1-3 seconds when i start it cold, oil pressure light takes about 1-3 seconds to turn off

and when driving it cold, as soon as i hit vacuum i can hear a tapping/knocking sound as well, which disappears when the engine is warmed up

i am confused/lost

help would be much appreciated

i pray it aint my bottom end

thankyou

[QIKEXT]

ummm if you could discribe the noise what would you say it sounds like and can you pin point where the noise is coming from LHS or RHS of motor ?

[Duncan]

umm light tapping sound that rises with revs but goes away when it is warm? not good news mate

[J_R32]

ok the sound, which is a light tapping sound (almost like a tap tap tap, but it not pinging) and it appears to be coming from the exhaust cam side of the engine.

[Morgs]

Best to take it to a professional workshop, such as Xspeed - don't take any chances!