Engine smoking

I have replaced my stock intake manifold with a skunk2 intake manifold on the car listed above EX model with d16y8. Skunk2 did not provide a intake manifold gasket so I decided to use the old one from the stock manifold. I am aware this was a terrible idea and now I am reaping the consequences. Now my car smokes out of the engine bay and I believe it is coolant that is coming through my headers and exhaust. My question is, when this happens is my engine damaged beyond return or can I flush the coolant system and oil change and everything will be okay?

Thank you for the advice. It's greatly appreciated. I will follow your advice. One more thing, my car starts but I have to let it sit for one day until my new gasket arrives. This should be okay, right?

Thank you so much for your professional and helpful input. I cannot stress how much this means to me. You have been a blessing!

Engine Cooling problem
1999 Honda Civic Manual 15000 miles

I got into an accident a couple of days ago, and my car ran up, under a Jeep. The hood got smashed down, and pushed in. Today, I noticed that the engine was revving when I was in neutral, and the engine light came on shortly afterward. Then smoke started coming from under the hood, and when I parked the car, my friend noticed that the anti-freeze was leaking out of the bottom of the car. My worry is that the hood cracked the radiator, and that is the source of my problem. I was wondering a general estimate of the cost to fix this problem: the hood (which is practically folded) and the anti-freeze leak, which could possibly be related to damage to the radiator. The lights work, and everything else.

I followed the recommended methods and everything turned out great! The car is running perfectly fine. I appreciate you guys.

Yesterday I did a Muffler change, Oil Change, Oil filter, Air filter, and spark plugs.

Today earlier I was driving my car to work, then the car it started to stall very little at first, then the Check Engine light came on, then Smoke started coming out of the engine, and I parked.

I checked the Oil level, was fine.
The Coolant, was fine.

The smoke was coming from beneath the car or from the center of the engine.

I checked the transmission oil and seemed to be ok.

I did noticed, that one of the spark plug wire came out from its position as it had blown.

What is the problem?

The hand on the temperature gauge went up to the H. And when I stop to look under the hood, it was smoking. I twisted off the top and there was no water in it. So I poured water in it and it started leaking from the bottom. I think the pipes are loose. How much would it cost to repair?

When ever I start my car it shakes really really bad and when I first start driving the gear slips a little but after driving around a little it seem ok

when I looked under the hood it looks like my radiator fluid is being forced out of its container becuase the fluid is all over the place

when I look at the back of the car the smoke from the exhaust putters out this with smoke and it smells really bad

somebody told me that my car needs a new engine becuase there is anti freeze wheres its not supposed to be and my bearing are getting there grease eating away and at some point my bearings will lock

is that correct and if so what does like something like that cost to repair is it even worth repairing?

Great thanks!

Engine Mechanical problem
1989 Honda Civic 6 cyl Automatic 188000 miles

Last week I did a tune up and then my car began stalling while driving especially after stopping at a red light or at a sharp turn. I notice when car stalls the fuel needle goes down gradually. When I did my tune up one of the spark plugs was soaked with motor oil. Twice this week after I turned off engine my car wouldn't turn on and a large cloud of gray smoke emits from exhaust. The car wants to turn on, but turns off quickly unless you heavily step on the gas. Once on the large cloud of gray smoke continues.

In addition, I changed the valve cover gasket and no luck.