Bmolina429

So here is the whole story maybe someone can help

2 weeks ago I took my Z06 to work and at lunch my oem balancer split at the zero balance rubber. It broke the belt and the car overheated for about 2 min as I pulled over. I put a ATI balancer on it now and took it out last Sunday for a test drive now my pro charger sucked in oil from my dry sump tank so I pulled the filter, inner cooler, cleaned everything out so I decided to do an oil change and there was coolant in my oil. I know this is a dumb question but is there a possibility the overheated engine was when the coolant got in there and now the engine is ok or do you think the engine is hurt.

During the test drive on my pressures and temperatures were normal. The car had plenty of power with no issues until I noticed the smoke from the pro charger taking in oil. I did notice my air filter was clogged so I’m guessing that’s why was pulling oil from the dry sump does anyone have any tests I can do compression test or other test to see if the engine is hurt or should I just change your oil drive it and see what issues I have. Thanks for the advice in advance

MTPZ06

Probably a head gasket.

Elvis beltran

Coolant in oil never good you can buy a head gasket tester at auto parts it sucks fumes out of coolant tank while car is running if it changes colors it's a bad

Bmolina429

That is my thought. But woul that cause my intake to pull oil from my canister my vet is connected to the intake side of my procharger

Undy

Sad to say but my money's on a cracked cylinder liner. Let's hope not...

Unreal

Head gasket or cracked cylinder.

Bmolina429

the only issue I have with it being a cracked cylinder wall is there is no miss and is running just fine???? wouldn't I get a rough running engine or some other indication?

Bmolina429

I'm doing a compression test tonight when I get home

Unreal

Depends on the crack. Some only open up when hot, and just do what you are describing.

Either way motor probably has to come apart.

Bmolina429

So I pulled the heads off today and not good. That car had compressions of 185 or better except #7 it was 170. Definitely head gasket was my thought BUT,,, here is a picture of the cylinder. So now looking at short blocks
First pic shows cracked piston

Second is of a crack in the cylinder wall

MTPZ06

Don't go with another OE sleeve block since you're FI. You might have had some detonation, or your tune is on the lean side. I'd be looking for a more robust, boost friendly short block...plenty of better options for you out there. Probably get a second opinion on your tune to be safe. Hopefully your block isn't trash, and you can recoup a few bucks.

Seen too many #7 failures whether NA or FI...would make get a set of flowed injectors, and stick the fattest one in the #7 hole, just because.

~STOLEN~

wow that escalated quickly

take your time and build a killer bottom end

Bmolina429

SOoooooo!!!!!! my plan as of now is to get an LSX block, stay with the heads that I have and custom cam since these have less than 100 miles on them and I already have the BTR trunnions installed. I'm Going with the Wiseco pistons, Callie long snout dry sump crank, Texas speed I beam connecting rods, as well as a MSD intake sitting here at the house and then take the restrictor out of the pro charger and run a little more boost :-). I also think I will be putting the 102TB on it as well now that it is apart. I will be calling the order in tomorrow to Texas Speed the only factor is turn time??? There are two other options that I am considering but TS is a reputable build.


As for the Block I think I am going to send it in and see if I can get Darton sleeves and build it back up for a back up. My brother has a 10 Z06 so no we will have a spare engine that I can pickle for a cold rainy day!!!

BigVette427

Wow, GM balancers are horsesh¡t. Glad I put a PowerBond race series balancer back on when I had my OE balancer off during my head/cam swap. Night and day difference between the two when you hold each one in your hand, yet GM almost gets as much for their balancer as PB gets for the Race Series.

MTPZ06

I'd skip those. Two piece composite manifolds aren't ideal for boosted vehicles. Plenty of 1000+ HP vettes running OE manifold/TB's.

Bmolina429

OK guys so I bought the LSX block from Texas Speed yesterday. Here is the build List
* LSX Block
* Callie long snout crack
* CP -20cc dish Pistons
* TSP super I beam Rods
* My heads (since there is only 100 miles on them)
* Ligenfelter head gasket
* OEM intake, Gonna take the advice and stick with it
* 102mm boosted TB
* Paxton 2200 Pro charger
* Kooks Headers
* ARP bolts all around
* custom ground cam
* Mantic 9000+ Twin Clutch
I'm sure I'm forgetting something


While the car is down I am also going to do my E85 conversion as well


So here is the deal if anyone is in the WI area and is interested in helping I welcome the set of hands, PM me and we can go from there. Good side is Texas Speed should have the engine here in 2 weeks, Down side it is still fricking cold here. the barn is only half heated and the lift is in the non heated area. LOL I will keep you posted on the build!!!!

LS1Steve

Ouch, another cracked #7 ring land on an LS. Same happened to my LS6 (1st gen CTS-V), on the same cylinder no less. Not sure if it's true, but I had a couple reputable techs back then tell me that #7 is always first to go in a lean tune, because it naturally runs slightly leaner than the rest due to it being in the back and getting some ram effect as air travels from front of the manifold to the back. Sorry to see it! Hopefully you caught it before causing more damage. Mine pumped so much oil into the exhaust and destroyed my catalytic too for that bank. Time for a full rebuild.

MTPZ06

Absolutely true. I always said that if I did a build, I'd get the injectors flowed, and put the fattest one in that hole, second fattest in #8.

Unreal

Stick with stock TB
No such thing as a paxton 2200 procharger. That is like a Pepsi Diet Coco Cola.

I would seriously consider swapping heads if you ever want to see 850+.

Bmolina429