Classic Mustangs (Tech)Technical discussions about the Mustangs of yester-year.
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well My car has sat for 25 years on a full tank of gas and when its turned on and reved a lil smoke come out the exaust i was told it is carbon build up on the valves and in the cylanders. would it be bad to remove the heads (i need to replace the gaskets anyways there original) and blow that **** out with a compressor?
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I would not remove the heads. When you bolt down a set of heads it slightly warps the cyl walls and that is part of the reason rings need to seat. When you pull a set of heads and reinstall them the slight warp changes a bit and your rings will not seat properly the motor will use more oil. The best way to fix your issues would be to replace the old gas with new gas, ad a couple bottles of fuel injector/car additive and then go drive the car putting good loads on it and winding it up to higher RPMs.
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This it the ticket- Go to a dodge dealaership and buy a can of CCC. Combustion chamber cleaner- Cleans up the carb , linkages and all carbon out of the intake and combustion chamber. let the ar warm up to operating temp. take off the filter, while idle'ing spray in the CCC, while adjusting the throttle so it does not stall. LOTS i mean LOTS of thick black smoke will billow out of the exhaust. if yo have cats i recomend they get removed, you might have to change plugs after as well. but it WILL clean out all the carbon. If its bad buy 2 cans. After the car has finished billowing like a 18'th century train. give it some gas and watch out, lots of black crap will come blowing out. so dont park it in the garage or facing the wifies car. let me know how ya do.
for a few minutes- you use the whole can, spray as much as you can without letting the engine stall. you can open the thottle while your spraying but your not using WOT or anything. Youll see the first time you try it. As soon as it works through the motor it will finish.
Oh i didnt mention, You need to spray in half the can then shut down the car for like 15 minutes. It soaks in and braks up the carbon. Then restart and spray the rest. The instructions are on the can. Its the absolute BEST product ive ever used- Its crazy to see all that smoke come out- its hillarious. If its bad you definately feel a diffrence. Its the first thing i do to a used car when i buy one!!!
I could not believe my eyes the first time I saw this, but I've since seen it work very effectively multiple times without adverse effects. An old timer showed me this. Crank up the engine and let it smooth out a little. Expose the carb and manually open her up to 3000-3500 and slowly pour about a quart of cool water into the carb- while it's running- and it will waste a goodly amount of the carbon gunking up the works. It'll sound like it's under water when you do this. I agree with others that carbon is likely not causing your smoking, but it certainly can reduce your airflow. I've not seen a negative result yet.
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