ok i got a big block 500 with carbon build up on pistons making it do a engine run on today went out and got seafoam will this work rite away and how is it going to remove it? has anyone eles use seafoam before?

I was kinda wondering the same thing, I have the same problem. I didn't want to use it because I have heard on higher mileage cars (Mine is 94,000 miles so somewhere in between I guess) it can cause the valves to have trouble seating properly and causes the rings to also not seat properly, leading to greater oil consumption. I don't know if this is true or not, but I dont want to try it until I hear more about it, anyone who has any advice on seafoam I'd appreciate it as well.

It'll probably make a big smoke show, and you will end up not noticing anything. How do you know there's even carbon buildup on the pistons? It's dieseling (running after you cut the ignition?) Have you checked the timing & at least looked at the plugs? Made sure the plugs are the proper heat range? And you're sure the idle speed is correct? If there is significant carbon buildup in the combustion chambers seafoam will help, for awhile, until more carbon builds up (if there's carbon, there's a reason it build up... usually an overly rich mixture.) GM Top Engine Cleaner will do a better job than seafoam, for future reference.

It'll probably make a big smoke show, and you will end up not noticing anything. How do you know there's even carbon buildup on the pistons? It's dieseling (running after you cut the ignition?) Have you checked the timing & at least looked at the plugs? Made sure the plugs are the proper heat range? And you're sure the idle speed is correct? If there is significant carbon buildup in the combustion chambers seafoam will help, for awhile, until more carbon builds up (if there's carbon, there's a reason it build up... usually an overly rich mixture.) GM Top Engine Cleaner will do a better job than seafoam, for future reference.
yea after i cut the ignition its does the dieseling some where around 80k or 112k on my motor i just put in new plugs on the car and the timing is ok so should i ever try the seafoam i already got it and how do i use it and will i have to change the oil rite away if i use it and from the carbon build up in the manifold it has to be on the pistons and i wish i could go out and drive it but i got no brake lines on it yet

Ok, after reading that a couple of times to understand what it meant (sentances are your friend,) you may as well try the seafoam as long as you already have it. It's not like it's going to hurt anything. I don't believe you have to change the oil after you use it, but read everything on the can before you use it.

Dude... punctuation. Anyway, its not going to hurt pooring all that stuff down there (carb), you may as well drizzle a bottle of ATF down there too as it will only help and you may even get to see some big shiny firetrucks after your done.

No breaklines? Sounds like the perfect job for a greenhorn! :2thumbs:

ok someone said i need to use lead gas is that ture and 102 octane?? this weekend i going to tune the carb use the seafoam and see what happens and maybe install some brake lines

Dude... punctuation. Anyway, its not going to hurt pooring all that stuff down there (carb), you may as well drizzle a bottle of ATF down there too as it will only help and you may even get to see some big shiny firetrucks after your done.

No breaklines? Sounds like the perfect job for a greenhorn! :2thumbs:

lol yea i kinda typed that one wrong sorry about that, lol yea ATF yea i put some of that down in the spark plug holes made a nice smoke show didnt help the car any but it got people saying WTF that was driving by

SEAFOAM IS BADASS it worked rite away i need alittle more but it dont do a run on like it use to BUT i had my face like next to the radiator hose it broke and well it burned my eyes lol

You do not need to use leaded gas, you do not need to use lead subsititute, you do not need to use a gas with a higher octane rating than your compression will use. Whatever premium is in your area should be fine.