[KB-GT]

Here's the rundown....
I have a 2003 Mustang GT with 38000 miles on the stock engine with the Kenne Bell 2.1L 9psi intercooled kit. The supercharger has been on the car since ~23000 miles.

Yesterday I did a WOT pull from 30-100 mph. I glanced at the boost gauge and the boost was where it normally was at 11-12psi then all of the sudden I see white smoke come out my exhaust and see the boost gauge spike to ~15psi right before the engine shuts off.

-Immediately after this happened I didnt notice any fluid on the road or dripping from the engine
-The car wont start and it appears all of my coolant has drained into my engine. (I put a 3 core Mishimoto radiator in after my factory rad cracked, so that's a pretty good amount of coolant)
-Immediately after this happened I didn't find any fluid on the road or dripping from the engine. After we pushed it into the road for the tow truck I noticed a small trail of this oil and coolant mixture. As far as I can tell, with the engine still in the car, a mixture of coolant and oil is dripping from the back left of the engine right above the headers. Its not a steady drip. I didn't notice anything dripping until we pushed it into the road for the tow truck, and until the car was back at my house. It has a few drips under it now but that is all.

I assumed the 11-12psi was fine because I have the stock exhaust except for the mufflers and the KB manual said that the cats could cause the supercharger to make more boost due to the restrictions.

I think I blew a head gasket but im thinking that maybe I did a little more damage than that. Any ideas on what damages are done to my engine would be greatly appreciated.

I recorded what my the engine sounds like when I try to start it to help with the diagnosis.

YouTube - KBGT- Engine start

YouTube - KBGT- Engine start

[sharkbait]

Take all the spark plugs out and crank it. Get all the water out of the cylinders

also pushing 11-12 psi with stock exhaust is soooooo inefficiant lol. Yes it makes more boost but thats because theres such a restriction on the other end lol

[bobz18711]

I think this is why people hang it up when the weather changes, was it cold out when this happened??

[sharkbait]

every boosted car makes more boost when its cold.

but thats not why people put them away for the winter.

[stal94gt]

suck, hope you have some money saved up, and you have time to tear down the motor

[sharkbait]

Well heres what your looking at...at best

Parts -

Head gasket
Head bolts
New valves (maybe)

Your going to need to tear the heads off and the front timing cover. The head is most likely warped so your gonna need to get it planed. You may be better off just buying aftermarket heads (MHS/TF/Patriot...but not really).

Blower and everything else needs to come off. Your looking at about 2 days work

[stal94gt]

forgot the intake gaskets, and exhaust gaskets. i would swap out all the gaskets you take off, but many re=use the valve cover and timing cover gaskets.

[superbeef1000]

sounds to me like she has a new vent rather then a bad gasket

[Willy Mo]

Originally Posted by superbeef1000 sounds to me like she has a new vent rather then a bad gasket

this is kinda what i was thinking.

[KB-GT]

snapped a rod... I figured it would happen just not at 38000 miles

[Bullitt5339]

You have to pay to play. Once you put a power adder on the stock block, it's not if, but when it's going to happen. Been there, done that, got the T-Shirt:

[sharkbait]

You dont need new intake gaskets unless youve put ALOT of miles on them

[Bullitt5339]

They say they're reuseable, but I always replace them, because it's easier than trying to hunt down a pesky vacuum leak later down the road.

[sharkbait]

Yea but there like 40 dollar gaskets lol
I reused them this time, just because they only had 5000 miles on them

[Bullitt5339]

If you can afford a KB supercharger or 5.4 supercharged engine, what's $40 to eliminate the possibility of a future problem? Like I said, you have to pay to play....... lol

[cbjohnson9]

Originally Posted by KB-GT snapped a rod... I figured it would happen just not at 38000 miles

That sucks man. Is the block still usable?

[Willy Mo]

Originally Posted by Bullitt5339 They say they're reuseable, but I always replace them, because it's easier than trying to hunt down a pesky vacuum leak later down the road.

THIS
ITs an easy way to prevent headachs later on.

[40thAnnivGT]

Thought the same thing with mine. Oil/coolant mixed under the car, but not a lot. Pen size hole in the block that I couldn't see because it was behind the motor mount, and two blown pistons...with a snapped rod....annnd a bent one. Sorry to hear man, best of luck to you.