I did an engine swap in my 2000 monte ss 3800. She was running fine for about 5 months. I let her sit for a week because it was to cold for her to be running. I finally started her up and the upper intake blew up into a bunch of pieces. I had some flames from the intake hitting my fuel rail and snapping it and a spark from the electricals. I put the fire out with snow. My question is, if i was to replace the plastic and all then flush out my coolant and oil would she start up n be fine? Or what other steps should i take to make her run?

 

as long as it was just snow you dumped onto the engine (no rocks or dirt) and it wasnt a lot to flood the engine with water i think it should be ok. depends on if the fire damaged any wires etc though....

 

Yeah i didnt put to mich snow in and i checked everything out. The uim was the only real damage i was worried about. Was it just back preasure that caused it?

 

was a backfire that caused it most likely, i remember reading somewhere what causes this to happen but i cant remember now..... other members may know off the top of there head though.

 

Would make sense i added headers to her and some other parts that would make her hate me enough to screw with me lol

 

Change the Fuel Pressure Regulator as you fix things back up. Those have a history when they fail allowing vapors to leak into the intake, when you start the car, it ignites the vapors and KaBoom!

 

The Maniac nailed it. The fuel pressure regulator was recalled years ago for this reason, apparently your's got missed. I personally witnessed an explosion like this when I was considering buying another '00 SS a while back. The hood was up and I was checking out the engine when it exploded and sent shrapnel flying everywhere, narrowly missing my head. Obviously, I passed on buying that one. Lol

 

man thats crazy, that makes me look at my intake weird...do this also happen to the dorman reinforced one?

 

It sure can. The reinforcement in the Dorman is just a 1/2" x 1" metal sleeve fit into the "Stovepipe" port where EGR gases are recirculated into the plenum. The rest of the UIM is all the same. The main culprit is the FP regulator, but Dorman's come with a new regulator as I recall.

 

nah mines didnt when i got it, it had failed before tho, made the car hard to start and sometimes would stall, it barely held pressure