G180 Problems

HighTeK · tinkerer Joined: 04 Jul 2002 Posts: 205

Hey Gemini fans,

I was Cruzing yesterday nite, when I noticed that the motor was making a Loud nocking noise (like tin cans) when i put the foot down. (is this Valve bounce?),
I have only done about 2500 Kms since the last service, I ajusted the valves clearances myself to G161 specs when the service was done.

Its been going like a rocket with no probs till now.

any idears???
The motor is stock exept for extrators. (i think)

Do G180 have different gaps to a G161???

Cheers.

GROOV3 · petrol head Joined: 04 Oct 2001 Posts: 3682

it would only be valve bounce if you were doing like 6000rpm

i would of though the g161 specs would be different but yeah i dont know

HOP_A_LONG · tinkerer Joined: 27 Aug 2003 Posts: 274

What fuel are you running? Try PULP.
A motor can valve bounce at any speed.

Racegem · backyard mechanic Joined: 30 Jan 2002 Posts: 987

I disagree. Valve bounce is when the valve spring doesn't shut the valve before the cam starts to open it again. This stops the motor building compression. Usually this is at higher revs unless you've got a broken or weak spring.

Sounds like it's "pinging" (fuel igniting before normal spark ignition). Check your timing. Watch what fuel you use. A motor with even a little bit of work can have high enough compression that a batch of shit fuel will cause pinging.