Water ran down on top of the alternator now it will not start

I don't think this is related at all to the alternator. Not only are they designed to get wet but even if it did fail, the alternator would not cause the engine to not start. It only provides voltage while the engine is running so it would not prevent it.

Just to be sure, your engine cranks but it does not start? You said it doesn't turn over but that typically means it will not crank. So, when you turn the key the engine spins but just doesn't fire and run?

If not, here is a guide that will get us started:

https://youtu.be/dCjmRL3p4Cs

We need to find out if we have a fuel or spark issue that is preventing this from starting so let's start with checking fuel pressure and then pull a spark plug and hold it against the block and see if there is spark when you are cranking the engine.

Lastly while the plug is out, can you see what it looks like so we can find out if they are fouled? I attached a diagram of possible plugs issue.

Let us know what you find, and we can go from there. Thanks

Okay. The click, click, click, and jump start is a weak battery. So, let's start with testing the battery.

https://www.2carpros.com/articles/car-battery-load-test

We need it load tested so just putting a meter across the battery will not tell us if the battery is okay.

Then the not starting issue sounds like a theft system is active. I suspect you disconnected the battery when you changed the alternator so sometimes when you do that, it activates the theft system.

When you turn the key on (push the button twice to the run position without starting the engine) does the theft light remain on or flash?

https://www.2carpros.com/articles/how-to-reset-a-security-system

Let us know about this and we can go from there but try pressing the unlock button on the key fob and then start the engine after the battery is checked and replaced if needed.

So, there is info here that could lead us in a different direction, but I think you are correct that the plugs need to be changed.

You are correct that these plugs are fouled and need to be replaced. So, let's change those and see if the engine starts.

Also, if the battery is ok and it was clicking that may just be a failing starter solenoid so let's not worry about that at this point.

Let's change the plugs and we can go from there. Thanks

Okay. That is great info.

No, I would not use that at all at this point. If you had fluid coming out that could have been fuel, so we need to start by replacing the plugs, starting the engine, and testing for a blown head gasket.

Here is a guide that will help with this:

https://www.2carpros.com/articles/head-gasket-blown-test

Also, you should do a compression test to find out if you are losing compression as it sounds like we have a warped head.

https://www.2carpros.com/articles/how-to-test-engine-compression

If we have a warped head, then it is unlikely that this chemical additive will fix it at this point.

If we confirm this and you want to try it then that is fine but if it doesn't work at least, we know what needs to be done.

Okay. So just a little more background on this. When this started, it was after it got hot and overheated? Then when you topped it off is when the water was spilled? However, this would not restart after the engine got hot?

If that is the case, then we need to just jump right to a compression check. It may not be a compression issue but if we don't check that and confirm it is not that issue then we will be chasing our tail.

https://www.2carpros.com/articles/how-to-test-engine-compression

If you don't have a compression tester, I am sure you can rent one from a parts store as most of them have tool rentals.

So, I think we have confirmed what happened. You appear to have a warped head and most likely have no or not enough compression which is why it is not starting.

You need air, fuel, spark, and compression in order to get the engine started.

Milky oil means you have water in it and that would have only come from the coolant. The only what that happens is if you have a head gasket pushed out or a warped head.

There are some other causes but when you had an overheat and a no start, then a warped head and no compression makes the most sense.

https://www.2carpros.com/articles/coolantantifreeze-in-the-engine-oil

I know this is not what you want to hear but I am pretty sure that is the issue. If you want to get a video of what it sounds like when you are cranking the engine, they normally make a distinct sound, and we can try and confirm it further that way.

Thanks