Just got a bf zr6t mk 2 its go usual mods exhaust cooler and seimens injectors

Have done 200kms in it so far and its developed a tapping noise

Only on idle and not at higher rpm , performes well and runs smooth ,noise increases when

A/c compressor kicks in , the fella I got it off reckons that's it is injectors

Noise and it is imminent ( sometimes does it and goes away)

I'm thinking it might be timing chain , any input woud be appreciated

My old ba had a ticking noise at idle and it would come and go but only when warm. Turned out to be idler pulley.

My ba has a noisy" chat chat chat chat" noise on cold start but goes away I'm thinking it's a lifter ???

Make sure the canister purge valve isnt hitting the lh strut tower

Could be just about anything. Have you tried listening to it with a screw driver? I had a few different noises when I had a loose flex plate and a bent rod. Both only on idle.

If you've over revved it flex plate and if it's over boosted or seemingly lost power on hard boost it may have detonated a little and bent a rod or two.

Could be anything though.

Injector noise doesn't go away.

Edited May 3, 201214 yr by riptide

It's conning from the top ,I think it may be the lifters ,it only does it when the motor warms

up,I'm going to try some thicker oil the oil in it was put in by previous owner

so I don't know what it even is , what oil would be best to use ? Any recomindations

woud be helpful.

Try castrol edge 10-60

Mate mine sounded like it was definitley coming from the rocker cover but it was the idler pulley.

Royal Purple 10-40.

I use a full synthetic Total Oil 9,000 10/50.

I thought the lifters were good in these. I've never had lifters make a noise in the 3 motors I've had in my BF.

Don't just put any old thicker oil in. Think of the turbo. Do some research in the oil section. I would have done an oil and filter change when I bought it.

Edited May 4, 201214 yr by riptide

Yeh try changing the oil first.