Originally Posted by Twister773
I just changed the cam, intake manifold and carb and some other things on my 390 in my Thunderbird. Anyways I got it all done finally and tonight I fired it up dry and then once it fired I started filling it with water and shortly after it started running bad and ended up dying...went to crank it again and it wouldnt turn it over....I pulled the spark plugs and most of them were wet with the water but I pulled the dipstick and no water on it....so no water in the oil just in the cylinders....sound like I put the head gaskets on wrong or what...thanks for any help.
From your initial description, you said you changed the cam, intake and carb. At the end of the thread you stated about putting the head gaskets on wrong. Did you have the heads off??? If you had the intake gaskets on wrong, or if you had the wrong set this may happen. If you did have the heads off, the gaskets will have the word "FRONT" on them for the correct installation. If you're still using the factory carb. spacer, this spacer has coolant going through it, and if it's cracked can leak into the intake and eventually into the cylinders. With the coil wire disconnected and the plugs still out, crank the engine over to get the water out. This will get a little messy so make sure someone isn't standing directly over the motor. Next, fill the cooling system while observing the cylinders and the spacer plate. This way you can see what's leaking. If you dont see whats leaking, disconnect the heater hose from the carb spacer and hook them together if you can. Then put the plugs back in, put the coil wire back on and see if the motor fires back up and see what happens. If it now runs OK then you need a new spacer. If it does the same thing then you have to start ripping the motor apart again.