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I've seen references to decarbing by pouring the GM Techron stuff into the spark plug holes and leaving it overnight. I think C4C5 Specialist prefers this method. Talk to me about why this wouldn't be a good idea:
Do the overnight decarb, but wait the entire winter before restarting and burning out the Techron.
I've already thought of this:
Cylinder walls, etc. washed of oil causing rust
I'm pretty sure this would be common if it worked. I want to know why it won't.
I've seen references to decarbing by pouring the GM Techron stuff into the spark plug holes and leaving it overnight.
And then what? Suck it out somehow?? If you crank the engine without the plugs, you will have a *(&*^&^%# mess! If you crank the engine WITH the plugs you will essentially hydrolock your engine and potentially cause great damage. :bb :skep: If you want a decarb, I would think the normal way would be best. BTW, "Techron" ia a tm of Chevron Corp, not GM.
I wouldn't risk it. A few years back I heard about a marine engine mechanic who used decarb spray instead of fogging oil in some outboard engines. Come springtime the seals were wiped out from the solvents in the decarb cleaner. If they tell you not to leave it longer than overnight, there is probably a good reason. Just my opinion.
The marine industry uses the same stuff for decarb, as a matter of fact, they have had it a lot longer. They only wait 15 minutes before restart. As it is, I think overnight is pushing the envelope. Over the winter, in my opinion, is a huge risk.