matt3310

I have a 06 Z06. Its has a huge cam in it. All the work was done by a previous owner so I don't know the specs. With all the talk of Z's blowing engines, what do I need to do to insure mine is not one of those? It runs great and is a blast to drive. Is there something I can do to my stock heads to make sure they don't fail?

Thanks in advance!!
Matt

u1arunit

Start with performing the wiggle test.

matt3310

Is that something I can take to the dealer and have done?

Rupert pupkin

Of course... Depending on the dealer, they might charge you an arm and a leg for it. OR you can take it to a reputable shop and they can do it. Dyno the thing too while you're at it.

pkincy

Unfortunately even with a TSB out for it, many dealers don't have a clue.

Simply go in and complain of odd noises in the valve train that concern you. If they are smart they will do the wiggle test. Likely they will not be smart and you are left to either do it yourself or find an aftermarket shop locally that is smart enough to do it.

sublime1996525

The previous owner just put a big cam in it and didn't do head work?

TT32VGT

ya see if there is any engravings on the head like wcch, livernois, etc...

if u know headwork hasnt been done.. get the wiggle test done(call ahead to dealer).. find a used set of heads in the classifieds here, send to wcch and have the st.2 headwork done with che rockers.. sell ur heads after install.

matt3310

Heres the description from the ad where I bought the car.

Factory options.
HUD
Navigation (Kenwood DNX7100)
Power and heated seats
Windows/Locks

Mods. All the work was done by LG Motorsports in Texas
Cam (114LSA)
Intake
Custome tune
Long tube headers (Kooks 1 7/8 primary to 3" collectors)
Cat Less 3" X pipe
Borla exhaust
LG Signiture Series World Challenge Hood
Brand new Carbotech 1521 brake pads (approx. 3000 miles)

Has Kenwood Head unit C.D. DVD. NAV
Custom amp and sub box tastefully done. Has 2 amps and has amazing sound.

Z Force wheels in ZR1 sizing. Wrapped in Nitto rear and Michelin Fronts.
Interior is black and grey.

Les

LG Motorsports- that's a good thing. Their rep is very solid and there's a pretty fair chance they'd remember your car. I'd give them a call tomorrow to see if they can tell you anything you don't know about it.

VetteVinnie

Yep, call Andrew and they should have a history of what was done to the car. Nice car, by the way!

1Sikstik

Did you get any paperwork of the build from LG along with a dyno sheet? I got mine already modded with all past receipts and the dyno data. My engine builder remembered my car and gave me the whole story behind it. Very valuable information to have. Then had the heads done because it had its work done before the head issue surfaced. Also did a cam switch to suit my driving style. Good luck with her!

JCox23

It probably depends on when your car was done. Mine was done in '08 which at that time the shop had no idea about the valve guide issue. Even though they replaced the exhaust valves they did not replace the valve guides. All the work that was done was a cam, ported heads, ported intake, ported tb, dual springs, stainless exhaust valves, 160* thermostat, Long tubes, etc. All the things that go with doing a cam. These mods were done with about 2500 miles on the car. The car now has 10500 miles on it and I decided to pull the heads and have them checked just to be sure and I am glad I did! The exhaust valves wiggled 25 thousandths! Tight is 1-3 thousandths. The car had shown no sign of the valve guides wearing that bad. No noticeable extra valve train noise, no smoke at start up, nothing! It was basically a ticking time bomb! I got lucky! After the heads were cleaned up, machined for new guides, and a valve job it cost me about $700. Thats a lot cheaper than a new motor. Pull the heads and have them checked. If nothing else just for your own peice of mind.

Turbooo2u

Both my local dealers look at me strangely when I say "wiggle test" and what it is.

GMuffley

ctsv510

Do you have more info on your measurements? What year is your car?

Service limit is .0037 which is just under 4 thousandths. If your guides measure at 25 thousandths it would be .025 and I believe possibly the worse wear measurements we've seen.

'06 Quicksilver Z06

if that's what they were, then that would probably be a "record" in here.

JCox23

I'll try to post a video I have tonight for proof. They're pretty rediculous.

Mark2009

Guys, .025 wiggle (divided by 2) would be ~.0125 guide clearance.

Thinck. Consentrait.

SSMOKE

This is interesting. So the factory PM guides with SS valves, dual springs and a cam were significantly worn out after 8K miles? I wonder if they checked the factory guides at 2500 miles.

ctsv510

If he was referring to the wiggle measurements overall then "tight" would actually be .002 - .005, or 2 - 5 thousandths. That's why I was asking for more clarification since it is unclear why he would compare actual clearance measurements to wiggle measurements (which need to be converted.)