Okay I think I missed up.

I think some coolant spilled down into the cylinders when the upper intake manifold was off.

When starting up the truck, there is a lot of white smoke coming out of the tail pipe. I let it run for about 20 seconds thinking it was just a little but but it kept smoking.

Is it safe to let it run and let the coolant burn off or will it cause more damage?

Do I need to disassemble everything?

 

It takes about 5 minutes to clear that, your exhaust has to get up to temp to burn it all off

 

Cool thanks will give that a try today.

 

Ran it out for a bit and seems to be mostly better. Still a few misfires on Cylinder 6. Going to go for a longer drive tonight and see if it clears out.