If you buy a C6 Corvette Z06... Your LS7 Engine Could EXPLODE 

FYI, the GM service manual says to replace the seals on the oil lines every time they are disconnected. Also, you have to be VERY careful to avoid putting a kink in the oil lines. They are poly and will be ruined if you bend them too much. I personally don’t put enough miles on my oil to worry about getting the last drop out of the lines. Also, my LS7 heads had 16,200miles on them and according to Lingenfelter, all of my exhaust valve guides were worn beyond the factory service limit! Just take your heads to a HIGHLY reputable machine shop that ROUTINELY does LS7 valve jobs and you’ll be good! In the DFW area, I’d personally recommend HPR in McKinney, TX.

The oil change procedure per GM does not specify removing the two dry sump hoses. I have a 2012 Grand Sport with manual. Every time I remove BOTH drain plugs and refill with oil, the car's taken 10.5 quarts, so that seems to be right on the money. I use Mobil 1 5W-30 with the Mobil 1 oil filter; my car has 52K miles...

The car sounds so sick! Just joined the Corvette world myself. It’s no Z06 but it was the cleanest C4 I could find and I can’t wait to get it out of winter storage!

I had Katech (located in Michigan) do my valve work and I couldn’t be happier with the work they did.

Yes we call them 'donut holes' because.....'Merica'

This was informative, and your car is absolutely insane!

TimBits, and Timmy's coffee are things I look forward to when I go to Buffalo, NY!

without a doubt bringing my c6 z06 to race ready garage when i pick it up for the heads to be done. nice video

Aberfoyle timmies !!! Used to work Nextdoor lol . I love the sound and chop of this vette

Your car sounds bananas!! 🔥

Nigel and Dave are always a blast...can't wait to see him tomorrow! Was good seeing you at the strip in this thing last year Jacob!

What amazing sound and power 😎 must be intoxicating!

Awesome video 🤙

Never apologize for the noise. Gobless🦅🇺🇸🇨🇦🍁

10 1/2 years and nearly 125,000 miles. So far, the valves are holding out. Been on the track, too. Apparently, early in 2011, Linamar started doing 100% inspection of guide dimensions. So far, no engine related issues at all. Negligible oil usage between 8500-10K changes. Been using Amsoil since 1,000 miles.

They increased the capacity of the dry sump system because early cars had problems with oil starvation with sustained high Gs.

9:20 EMI is from copper plugs like the NGK tr6 that everyone uses once they go big power. If you switch back to the irridium plugs like in the ZR1, the service charging system errors go away. Saw this first hand with my blower C6 a long time ago. Pulled the TR6 plugs in favor of the stock ZR1 irridium plugs and no more errors. Nobody thinks of this, but it was so simple.

I use to live in Ontario up until last year. lived in Milton, worked in Brampton. My previous boss purchased a used 2009 Z06 Corvette from a guy who was retired. It had the replacement engine because of the valves dropping. My old boss loved how loud it was but at the same time hated it when the butterfly valves were open as it made him deaf. It was his favourite car. Jakub, I have the same Nike Monarch shoes. And toasted coconut chocolate timbits for me.

chopitie chop chop. I did replaced my heads. Didn't upgrade anything but the rockers. Mostly stock except radio, Corsa Sport, and MGW shifter. I do kinda regret the shifter. Love my '06 C6 Z06! Awesome.

Worth it. LS7 Glory!

This is my dream car. I sold my C5 recently. I'm hoping to get myself a C6 Z06 in a year or two. 💛

Sour cream. Always.

Cool Cool! Love the ‘71 too ♥️🤍💙

C6 was my first car and I daily drove it, perfect car for me at the time. I’m now wanting a C6 z06.. I seriously think C6 is one of the best corvette generations. I would love a c6 ZR1 but those are getting out of reach, and can’t go wrong with a 7.0 (: Love the color too!

Coffee and Timbits for your techs. I used to do exactly the same whenever I was getting work done. Bring coffee and snacks for the crew

Getting RPM heads and cam package done in a couple months on my C6 Z06. Also getting a MSD intake manifold. Can't wait for that chop and 600whp all motor! I currently have 46,000 miles on mine and no issues besides replacing the starter and it says service traction system time to time.

The LS7 head issue is well known, the "fix" is more of a mystery, everything from aftermarket heads to new valve guides, to new valves have been suggested over the years

Can add a ceramic coated tunnel plate for rigidity and heat prevention in the tunnel. Did it on my C5 made a difference with longtubes.

I grew chest hair when the vette started choppin

It’s nice. I enjoy my 19 C7 ZO6, M7.

What a sick car.

This videos makes me wanna work 100x harder to afford one

Love the mods…just the right amount of chop. What’s with the Nikes…trying to loose your Corvette card? New balance are the official shoes of the Corvette owner.

I have a supercharge (vortech) ‘13 grand sport with a dry sump. Changed my own oil for 4 years, not once did I have to disconnect the dry sump lines. First time hearing that. It drains and fills roughly the same amount.

This dry sump draining thing boggles my mind. I have never seen any documentation anywhere. (Including GM) talking about pulling the lines. It’s gravity fed, so the tank should drain down to the pan (hence why GM says to get the car to 175* oil temps then shut it off for 5 min to check the oil properly. If this is really a thing, this is a new theory to me for sure

Its a shame that gm never recalled all zo6's and fixed the heads the way they shoulda. Ya it woulda cost a lot of money but the cars cost a lot of money it was a bad move on their part.

That’s friggin INSANE 640 rwhp. Awesomeness, wish you were my neighbour.

Great video. Ever come across the issue with the check engine light for the gas cap leaking vacuum?

I had the same DEI heat deflector and it did take longer to heat up your left leg but not much.

We take our C6Zs to the same shop! RR is a great shop.

I'm running 15w-50 Motul 300v in my C6 Z06. Great product but no detergents that conventional oil has. Not a cheap oil change! $$$

Shame on GM too NOT stand by their faulty product, really bad ! Strange that no one have sued them.

Most talk about what they think is a valve issue but I suspect a bigger issue is that the coating wears between the titanium rods. Once worn, the rods rub together or against the crank putting debris into the oil which makes the bad things happen.

I bought a set of new LS7 heads about 5 years ago for a good price. I need to send them off. They will go on a Dart block into a 66 nova project. The car will look stock from the outside. It will be a Drag N Drive car. NA with a manual transmission.

I have only ever drained the two plugs and have some smoking at wide open throttle on track. Interested to see if the dry sump line removal improves it

@josh Weldon poor guy. Also this was the reason I skipped c6 Z06 & I went with c7 GS Part of me still wants this though 😂

In 2013 they said to use ss valves in your head job. My engine failed at 29k miles. My engine was destroyed and GM did nothing because it was out of warranty by years. Oil was chocolate milk and spark plug head melted in valve 1.

Where did he mount the other end of the second alternator ground strap? Thanks

The donut things are called “Munchkins” in the USA.

I thought everyone was going electric Didn't you get the memo? you got my sub .......

I think most know Tim Hortons as there used to be Tim Hortons in the selected areas of the US. They have actually been theoretically an American company at one time 30 years ago as Wendy’s owned them since 1995 and then sold it to Burger King about 10 years ago.

Nice and informative!! I have an 09 Z with a Lingenfelter 660 package and I'm very happy with it. And yes, the heads issue is no issue with this owner. Lingenfelter took care of it all, plus some extra goodies.

Do both the exhaust valves and intake valves need to be repaired on these engines? Or just exhaust?

I am getting that service charging system warning and decent voltage around 14V. What’s that grounding trick ?

I run an LS7 in my 67 Camaro with Brodix BR7 heads. Few questions? 1. What did it make to the wheels with the ported stock casting setup? 2. Have you had it on the Dyno with 1 7/8th headers? What did 2" pick up or does it simply require that? ( I'm currently on 1 7/8 feel like it's choking it some). 3. Is that MSD Atomic Mamo or otherwise ported ( I have a hi ram but thinking of going to one ). Thank you for the video and information...

The bit is called a tripple square .

Anyone who doesnt already know about this issue (which has been beat to death for years) where have you been lol? 630 wheel though your car is making some steam! Thats a healthy number for sure

Hey, Jakub any recommendations on a brake repair mechanic near Mississauga are?

I still miss mine. 42 thousand trouble free miles, with the exception of a weeping head gasket that was replaced under warranty. I never drained the dry sump lines and somehow never over filled it. I have never seen anyone drain those lines....interesting

I have a 2007 z06 with 108k miles. Motor blew at 48k due to valve issue. Crate LS7 has been fine since. Valve issue on ‘06s and early ‘07s is real

Hey Jakub, thank you for posting the video. I'm currently in the market for a C6 Z06 and am trying to figure out whether to completely stay away from any that haven't had their heads done. Savagegeese made an amazing video on this car in which they've also brought up the issue with the GM engineers they interviewed. According to them, all of the wrongly machined valve guides were subsequently assigned to a certain batch of bad heads relatively early during the C6 Z06 lifecycle (end of 2006? 2007? They didn't specify this unfortunately). They also claimed to never have actually seen cases of dropped valve heads. Have Nigel or Dave mentioned anything about affected model years? Do I correctly assume that all Z06s built 2008 or later are fine?

That chop...

2009 tank up grade

Just budget an additional 5-12K you should be good.... Jeesh! Cool car no doubt. In the back of my mind I'm wondering why with it being GMs "Halo" car they haven't issued a recall if 20-30 or 50% of the cars have issue with the valve seals causing valves to drop and destroy the engine.

Most Z06s by now, unless they have ultra low miles, have had this issue fixed…but ask for proof before you buy

DAT LOPE THO! 😁

My Z06 did valve drop and break on supposedly previously fixed heads. If you cannot absorb the cost of replacing the engine, get a Grand Sport rather. Keep in mind LS7s are discontinued and dealerships that held on to service replacements are gouging prices pretty badly.

A Canadian Guitarmageddon 🤔

My dream was a base C6 but here in Europe they were almost never sold... :(

We have some Tim Hortons in the US, or did. It wasn't great, but I heard it wasn't the same supplier.

Any battery drain issues letting it sit for weeks or is it on a tender? My z cant sit for more than 10 days without completely draining the battery

So what exactly was the issue with the Frankenstein overported heads? Were they made incorrectly or just didn't work with your setup?

Ehhh per the manual the oil line part is not required when changing oil

Not sure if you've ever said what you had for a damper on the engine. Ati makes some very good ones.

Why you did you change from Frankenstein CNC'd heads to DART CNC's heads?

It’s very simple, change the heads, no big deal fellas 🇺🇸🇺🇸🇺🇸🇺🇸

Did you get with Frankenstein and have them check the heads?

Are you mad at God ?love your car sounds awesome

You need amt motor and trans mounts.

So even if you get new heads and valves and everything you’ll still have to worry about drop valves ?

Jakub, remind me again what exhaust you have? Is it Corsa Extremes?

Can you post your build sheet?

1. Love the channel, 2. Not a corvette guy, 3. Watched anyway for Rex content, 4. No Rex this time :(

Go back and do a video on the green chevy vert donk

Hey jakub, what do you have all done to your z06? I want one myself and I like the whole vibe of your set up!

Less face time more car time thank you

I had Katech do my heads ask for Dan

"Don't worry about the heads" he says whilst driving an LS7 with fixed heads...Yes, worry about the heads. I waited a long time to find an affordable Z with the heads fixed already. It matters. Tim Horton's exists in the US, just not everywhere. We have them here in Ohio.

Plain TimBits are the best

Bro, that green 71 vert. Thats a real deal donk, in CANADA?????

How long does it take to get up to temperature? 10 minutes of gentle driving?

I love these things but curious … what do you think of the gearing? After your last video I test drove a c6 427 (I’m a convertible guy) to replace my c7 stingray, and the super tall gearing absolutely killed me. Couldn’t get to the top of 2nd on any of the back roads near me. All I wanted was to hear that 7L v8 hit redline and it was near impossible! Curious - does it bother you? I ended up sticking with my c7 because despite the less exciting engine, the gears are way way shorter and that made it a little more fun for me

Where is this shop located?

Keep your oil 1 cm above the highest level and keep the engine stock, there will be no Valverde dorp trouble at all😀

The Z06 is really nice, I would find that exhaust to be annoying after about 30km’s - but hopefully not an issue for you. That colour can’t be beat. 🤘

AMG wagon and a ZO6. Perfect combination Jakub.

The whole Corvette community knows this. I'm going to buy a C6 Z06 and the first thing I'm going to do is get a cam heads package.

But we have timbits too😅

whats the exhaust setup on this

He is by far the coolest Canadian