Over Rev'd, Whats that Grinding noise??

[Cashizslick]

*** Edit *** turns out there IS a faint clicking sound coming from my motor. The noise isnt loud enough to be heard from inside the cabin but can be heard w/the hood open :(.


Hey all.

I was recently out practicing my launch for the track.

Mods:
96 S14
S13 Redtop (no ras)
Basic upgrades (exhaust fmic, etc), stock injectors, walbro 255lph fuel pump.


All was going well, but on my last run i missed 2nd gear and saw (to my horror) my rpm's rise to 8k. When the RPM's got up there I heard a grinding noise that went away after they dropped back down.

Wanting to know if something was broken, i decided to do a 3rd gear pull @ 1bar to listen for any noises/performance issues and the car pulled fine :tweak: I also didnt hear any noises.

I dont think I blew a rocker arm because the car idle's fine and the grinding noise hasn't been back.

Any Idea what that grinding noise was that I heard at around 8k on my miss-shift??

Thanks in advance.

C

[SpeedMonkeyInc]

Maybe your gear? Where you still trying to get second to engage?

[Cashizslick]

See, thats where I am also confused . . .

I let off the gas and stopped trying to force the car into gear when i new i missed the shift.

[IAM_SO_sLOw]

its probably your gears.....lol did you push in the clutch after you relized that you misshifted? i wouldnt worry about it if the sound doesnt come back...try driving around shifting through all the gears and seeing if it grinds... it was probably just a quick grind

[Cashizslick]

^ sound advice.

I dont think the clutch was in, but i cant remember 100%. I just remember thinking it was an engine noise.

Thanks

[Cashizslick]

Allright . . . since i didnt hear a noise from inside the cabin i figured everything was ok . . . . but i decided to pop the hood and rev the motor anyways.


Turns out there is a very faint clicking sound coming from my engine . . . :( Im guessing that this is a busted rocker arm or one that has shifted out of place.

Could it be anything else since the car drives fine?

[Nizzan4u2nv]

Pull the VC and make sure. If the rocker/shims pop off and bounce around the head its not good. Been there, done that. Bent valves and everything.

[IAM_SO_sLOw]

check your gaskets...could be a blown exhaust gasket, turbo gasket, etc....

[Cashizslick]

Pull the VC and make sure. If the rocker/shims pop off and bounce around the head its not good. Been there, done that. Bent valves and everything.


Yeah i gotta pull the vc and have it checked out . . .

This is a weird problem . . . the motor seems to function just as well as it did before this happened. I really gotta get this figured out before going to the track and exploding something.

Hopefully it doesnt get worse from me driving.

[SoSideways]

You sure that clicking sound isn't coming from the injectors?

[fliprayzin240sx]

You could have bent a valve already and not know it. Clicking noise could be the bent valve sticking.