Engine Knock?

[hairdryer33]

Some times while boosting my engine develops a knock so I thought. Stock everything and sounds like a bottom end bearing but turned engine off today and coasted along for a bit and the knock was still there, then dissappeared! Its not the exhaust or suspension, I did think maybe heater fan but it was off this time. Wtaf

[GTSBoy]

Gearbox gnomes?

[hairdryer33]

Mounts?

[R_34]

Could be.

I drove a mate S13 some weeks ago, it has been manual converted and made a noise that sounded like yours on an WOT acceleration in 2nd on the exit of a roundabout.

It went away the second I pull the foot from the gas pedal.

I didn't notice any vibration on the shifter but I didn't had the hand on it but it was definitely coming from the transmission/driveshaft area.

I didn't found the source when I checked it back at the garage and my mates never had it even when it rapes it.

Check the engine/gearbox mounts and the driveshaft bearing at first.

I don't knwo the clearance between firewall and starter bulge on the bellhousing but check if there was any traces of contact between the two.

[hairdryer33]

Ok cheers will do. Its not all the time but is concerning none the less

[Humbla]

I had a prob like this a few years ago,was gear box mounts. :-)