Shepp1691

iTrader: (8)

Just finished my head cam package on my 02 Z and now there is a strange whining noise while your coming up through the rpms. I went with 225/229 580/590 114 LSA howards cam and 2.02"/1.57"/64cc LS6 style stage II heads. The guy that tuned it said it sounded like a valve train noise that he hears a lot from Patriot Heads. Anyone with similar problem have a clue?

Shepp1691

iTrader: (8)

Bump for anyone..

00MaroonZ28

iTrader: (3)

Patriot heads tend to chatter at idle, but I've never heard of them whining while coming up through the rpm band. Did you check your pulleys?

Shepp1691

iTrader: (8)

Belts were replaced, pulleys in good shape, whine is coming from within the motor

Shepp1691

iTrader: (8)

Bump, certainly people use these heads

Old SStroker

Did you change timing chain and sprockets? "Whining" noise should not be head related.

Try using an automotive stethoscope to isolate where the noise in coming from. Here are a few sources. Your Sears or auto parts might have one in stock.

http://www.sears.com/shc/s/p_10153_1...0070921x00003a


http://www.amazon.com/Mechanics-Stet.../dp/B000RB5WQY

Shepp1691

iTrader: (8)

Did not change the timing change or sprockets, they only have 30k miles on them, the sound can only be heard in the car when reving the engine. If your outside the car under the hood you cant hear anything. The guy I had tune it said it was valve train noise that he hears a lot with patriot heads.

MIDTOWNSS

iTrader: (2)

Get a soud clip it is hard to diagnose a noise over the computer

SSmafia

May be a dumb question but are you sure it is just not the intake sounding like a supercharger?

Shepp1691

iTrader: (8)

That is a good description of the noise actually.

Shepp1691

iTrader: (8)

I have had a an ls1 with afr heads and a big cam and I never could hear the air going through the intake before though.

bluehawk2

iTrader: (74)

vacum leak????? Something air related clamps tight on the lid? AIR motor?

just some thoughts

Gunnar@Patriot

iTrader: (20)

The valvetrain noise that will have with our heads sometimes is a result of the Patriot Gold valve springs. The greater pressures will sometimes result in a slight valvetrain noise that is a "clicking" noise but not a whining noise.

Shepp1691

iTrader: (8)

Thanks, for the clerification of the valve train noise, as for the AIR system, all the air hoses and emissions stuff have been removed.

eamador11

what about the intake leaking due to a loose bolt? have you tried retorquing everthing in the proper sequence?

00MaroonZ28

iTrader: (3)

It's got to be an air leak somewhere. Like said above, check your intake.

Arctic2002ss

My car is cam only and I have had what I call more of a whirring noise since the cam and springs (918). It's like you describe. It's not very loud but there and the shop said it was just the springs working. It's been that way for around 2 years and the car runs great so I have not worried about it.

Zitty'sZ

iTrader: (29)

This is a pretty good description of the noise my engine makes as well and I am running Patriots 226 cam and their stage II LS6 style heads with 2.02 intake & 1.57 exhaust & 64 cc chambers . The noise is not loud at all and you can only hear it at idle . It runs like a champ with no problems at all .

Shepp1691

iTrader: (8)

Well thats good to hear, I guess I just wont worry about it, besides if it blows up I can always build it bigger...

stangslayer98

Off topic but you should have put a new timing chain in there aswell as new lifters. Just my 2cents