Welllll I think my motor be dead. Long story short, went on a club car cruise sunday. Did a 120+ run off an on-ramp and at peak boost check engine light. Code scanner said engine banks 1+2 were running lean...my fuel pressure gauge read 61# at full boost, and my wideband showed a 10.8AFR..so I definitely wasnt running lean.

Drove around fine after that, all day monday and part of this morning. Get on the hwy again to go to school tonight and Im cruising along doing roughly 75, not once into boost..and I look down to see coolant temps at 210 which is normal for me in city driving with a/c on...not hwy driving with windows down. Tried the turn heater on old school trick and the temp climbed to 250(which is not good on a alum block). Got it towed home and had my neighbor do a pressure test on the radiator..pumped it to 18#s turned the car on and at idle it raised to 20# and after about 30s it popped the tester off, and the empty reservoir was now full and spewing dexcool everywhere.

Let her cool down again, turned her on and checked the exhaust pipes....puffs of white smoke and water was coming out..but my new oil was still amber clear and not a sign of water.

Weve come up with possible bad water pump(but it still spins freely), possible stuck tstat, or headgaskets have gone.

Needless to say...whatever it is the s/c is coming off the car and becoming a heads/cam car. For one itll help cooling the motor with the bigass intercooler out of the way. Secondly when I go to auto-x events I wont be placed in leet groups. Dropping the car off to my shop thur so Ill update when I find out.

quote SVTman

Im cruising along doing roughly 75, not once into boost..and I look down to see coolant temps at 210...
Let her cool down again, turned her on and checked the exhaust pipes....puffs of white smoke and water was coming out..but my new oil was still amber clear and not a sign of water.

Actually sounds kinda similar to what the '93 Vic was doing before I got rid of her. Only at WOT my engine temp gauge would go up (didn't used to, new one doesn't). The car was puffing white smoke like a son of a bitch, along with water (but all Fords do the water trick). And my oil was still fine.

I got rid of the car before anything happened that would involve major money. Hopefully your car just has temporary AIDS.

quote SVTman

puffs of white smoke and water was coming out..but my new oil was still amber clear and not a sign of water.

At least it's going into the combustion chamber and not into the oil. Sounds like a blown headgasket for sure. You should most definitely smell coolant coming out of the exhaust if it is white smoke from coolant.

Maybe you need some better head bolts with the compression that supercharger is adding. I'd say leave it on. It may not have handled it this time, but it can be built to.

Corvettes come with true duals still, correct? If so, is the white smoke coming out of both tail pipes? Or just one?

Im running ARP headbolts. Trust me no expense was spared building this motor. Every internal is forged, cam was custom grind from comp cams built to my specs.

The vette is true dual, its cat less 3" with x-pipe setup. Water comes out both, but the smoke is more visible out of my passenger side pipe.

When the engine was idling, I don't smell coolant at the exhaust tips or inside the engine bay.

The blower is coming, its just too much heat with the florida heat, actual head unit heat, and intercooler blocking air flow to the radiator/oil cooler. Going to heads/cam itll run cooler and less maintenance.

My neighbor thinks it might of been running straight dexcool, hes seen problems with that stuff eating away at seals. So when they flush the motor Im going to run a 50/50 water antifeeze with couple bottles of water wetter.

Maybe its just time for a rear mount?

Dude that really sucks if it aint a water pump, t-stat, or gasket then Id be like fudge atm also... Did you check your spark plugs yet on the passenger side?

Im going to tonight, last night it was waay to hot to even get close to. Im actually liking going to a heads/cam cause of badass it sounds lol over a loose belt whine.

http://www.youtube.com/watch?v=TE8mfo2PSMw

http://www.youtube.com/watch?v=ucq7bPBR8e4

Dexcool is straight up the shittiest coolant you can be putting in your car. That shit congeels (sp?) at the drop of a hat and turns into mush before you know it. Stay with the green shit and some water wetter and you'll be good to go. Hopefully you can get away with new head gaskets and ARPs as the only parts expense. Good luck!

+1 ^^^

And the green stuff is the best stuff. Dexcool is a GM thing, so expect your lid to say Dexcool, and your owner's manual to say only Dexcool will work.

That's not true. The green stuff should be changed every 2 years while Dexcool calls for 5. But, I'd rather flush every 2 years and keep nice, clean antifreeze.

And even though you don't smell coolant, I still think it definitely is. If your coolant level is dropping, well, duh, then it surely is. But, it sounds like a classic blown headgasket (or 2) since you have more white steam coming out of one side than the other.

I hate to see ya take that supercharger off. I mean.. if your coolant temperatures were staying cool before, I don't really see it being a problem. I'm not saying you are wrong or anything, but surely someone else has a supercharged vette that has lasted over a few months, ya know? Sometimes shit happens, and maybe shit happened to ya?

And if it was running straight Dexcool, it wouldn't have been able to keep cool. Most definitely can overheat with pure antifreeze. 60/40 is the best for protection of your coolant system, while 50/50 is the minimum you can have to be protected.

Well see, all last summer my car spent its time in the shop...its never seen florida heat as much as it has. My neighbor told me that could be part of the problem, it hid the problem in the cool weather but once it started gettin hot and humid it reared its ugly head.

Even on a 40* day at cruise speeds, the lowest my temps would get it like 188 which is ok. During like 70* temps nothing more then 198 and IF I ran the a/c 210 at max.

Im not going to miss the supercharger really having all that power in my town was a waste. Ive already got plans after school to built a forged 572(C6R motor) and throw a twin turbo on that, of course with a built tranny(hoping RPM gets the A6 build down to a science and tested for numbers). Even when I was at 504hp, nothing in town or even going to school could keep up with me. So, if I stay around 500 or maybe a tad more with all motor theres always nitrous for the hwy.

Dexcool = Fail.

GM offers the service of flushing it out and refilling with green. Yeah, if GM will do it, then even they know it sucks.

I've seen at least 3 water pumps come into Advance as cores that had the blades on them eaten away by something. All were from GM vehicles running Dexcool. So, I think it probably turns evil with time. Stupid Dexcool.

Well Ive decided to keep the blower, solely for the fact people on the forums expect to pay 2500 for a complete kit that cost 8k. No way in hell Im letting it go for that.

Secondly, I just found someone whose buying my lincoln so I just ordered a new ram air hood, to help keep engine bay temps down.

This is what it will look like.

Well upon the car arriving to the shop they did a compression test and found the head gasket and all seals to be working properly. Tstat was working correctly, and they noticed my radiator fans were dead. So itll be there for a couple days waiting on parts and getting swapped. I can finally breath now.

So how much power loss are we talking with the ditching of the supercharger, if any?