Tac1sc

Does not really have any affect on how the motor runs, just annoying. No smoke, idles fine, and pulls very strong. Its a gte aristo motor with stock twins. Anybody have any guess what is making this ticking noise? Tried different oil viscosity and brand, popped my valve cover everything seems ok. It's not coming from the front/timing belt area but towards intake manifold side. Could this be valve shim?
Pardon my loud fan

INTIMAZY

iTrader: (5)

Could be a shim. It's definitely a lifter-like valvetrain noise. I personally would just leave it as is unless you really feel like taking the cams off.

gerrb

iTrader: (34)

Sounds like valve shims to me. Same sound I got before I shimmed my 272s . Get a stetoscope and see if you hear it loudest on the valve cover ...

93MSB

iTrader: (8)

did you ever do any headwork? or were the camshafts ever taken out? is there any chance the buckets and/or shims were swapped around? from the factory they are clearanced specifically for each valve

if i were you i would pull the valve covers off and inspect the valve clearances with a feeler gauge.

heres the service manual procedure

Tac1sc

Yeah, no need for stet, difinitely coming from vc.


Already planning on doing that just dont have time and I need to get a feeler gauge. I dont redline this car, may be only 3x in the past 3 months. Lol Does this require immediate attention?

soarer13oy

iTrader: (13)

Start the car and pull every coil connector one at a time. If the noise stops its that cylinder that is giving you problems.

Tac1sc

^^^ Will that process still work even if its not fuel, ignition or compression problem?

soarer13oy

iTrader: (13)

Yes if the tick goes away when you unplug the coil it will tell you its that cylinder that is messed up. Usually the block.

93MSB

iTrader: (8)

not if its valve itself tapping. The cam is still going to be turning and opening the valve so the valve will still be tapping against the valve seat

Tac1sc

Exactly what I have in mind but will also try since a five year old could do that.lol May be its one of the injector ticking.

stockhatch

iTrader: (12)

Be careful ignoring that too long. If you get enough lash, you could theoretically spit a shim out and have some big problems.

soarer13oy

iTrader: (13)

Is it rpm dependant? Mines would tick from 3-3.5 k rpm. Drained my oil put it in the sun and it was sparkling so i pulled the motor.

soarer13oy

iTrader: (13)

Stopped ticking when i pulled cylinder numeber 3 coilpack

Tac1sc

Did you found out what was wrong with it? What does it mean when oil sparkles? Was it burning oil/coolant? Was there a compression problem?

stockhatch

iTrader: (12)

I think he spun a bearing Tac1sc. Yours sounds more like top end to me. Its easy to pop the covers off and at least check the clearances. Once you know your clearances, you will know more about the source.