white smoke #1 cylinder Head Gasket?

[njdevi11]

I've got white smoke peeking out of my number 1 cylinder (i loosened the manifold to see where its coming from) Then entire engine smokes pretty bad when starting but it evens out when it warms up, except for that one cylinder. it smokes at idle but when the engine is reved up a little it will go away. here are my theories (in order from what i hope it is to what i hope its not):

Nothing is wrong leave it.
Timing is retarded.
Injector needs to be replaced.
Blown Head gasket.

[Husker 6.5]

Crack in the head between valve seats into the water passage.

The going away when you rev the engine leans heavily towards #4 or #5. The increased cylinder pressure prevents the coolant from seeping in. When my heads let go, I was 60 miles from home. I loosened the rad cap to leave the system depressurized, and added 2 gal to the system. The trip at hiway speed the truck barely used any coolant, but as soon as I hit town with stop and go and idling, whooey! Baaamm went the temp gauge and white smoke out the exhaust like crazy. It was go a couple of miles and stop, cool down, add two gallons of water all the way across town. Six gallons later I got home!

Try this. Run your vehicle for a while (errands around town, home from work on a Friday). Let your vehicle sit overnight. Remove the injector, and using a mini maglight and a small inspection mirror, look straight down the injector hole through the opening out of the precombustion chamber at the top of the piston. (It's a juggling act, but it can be done. Just remember that left-right and up-down movements are reversed when using the mirror to aim the light and look). You will be looking into the dish on top of the piston, and if it's a gasket or head, you will see antifreeze 95% of the time. Have you noticed a gradual decrease in the cold level in your overflow resevoir? Same cause. You can also confirm by using a combustion gas detector kit and taking a sample from the resevoir while the engine is running. Most radiator shops will do the test for little or no cost.