Methanol- corrosive?

gmcturbo

Active member
I've heard that the reason methanol additives in fuels stopped because it is corrosive to the metals in the engine. Is there any truth to this, or just because an alky kit only sprays part of the time that everything will be ok?

Thanks
 

Robert Lone

MUTANT
Re: Methanol- corrosive?

I heard it eats some of the factory seals in the fuel system.

However, meth soaks up moisture and that could easily explain the corrosion theory.

JMO
 

VermontTy

Support Our Troops
Re: Methanol- corrosive?

T-56 said:
I heard it eats some of the factory seals in the fuel system.

However, meth soaks up moisture and that could easily explain the corrosion theory.

JMO
I believe it eats natural rubber.....
 

'JustDreamin'

Dream: 6LV8 Turbo Bravada
Re: Methanol- corrosive?

Its definitely corrosive. If you're running 100% methanol, you need to make sure that your fuel system is compatible. Aluminum doesn't like it. Most natural rubber doesn't like it, but most of the synthetic rubber products (Buna-N, Neoprene, PTFE) will do just fine.

If you're running a low percentage (like 10% or less, balance gasoline), you shouldn't have to worry about the fuel system.

The internal components of the engine aren't really all that critical. Yes, certain parts, like the inside of the intake manifold and such, will be exposed to methanol (if you're using a boost cooler type system) but its not the constant exposure to liquid (which is what causes the corrosion damage) that you'd find in fuel system applications. So, no real worries there.

Really, the only concern is for guys running high concentrations of methanol in the fuel as an octane booster (or running straight methanol) is fuel system integrity. O-rings, fuel lines, fuel rails, etc. Gotta check compatibility if that's what you're doing.

'JustDreamin'
 

Loeryder

New member
Re: Methanol- corrosive?

What about spraying methanol directly into the upper intake with no fuel to dilute it?
Thats what most of us using alky/meth injection are doing with it.

Mine enters after the IC before the TB, so the TB and upper plenum are being wetted with straight methanol.

Only side effects I noticed was that it cleaned a lot of the carbon out of the upper those first few tanks.
Going to pull my upper soon for port matching so I will check the inside of it then for anything unusual.
 

'JustDreamin'

Dream: 6LV8 Turbo Bravada
Re: Methanol- corrosive?

For the most part that's not that big a deal.

Methanol doesn't dissolve aluminum on contact (like spray paint on styrofoam). Its constant exposure to liquid over time that does the damage.

So, if you're spraying methanol 100% of the time and the engine runs 24/7, you probably ought to worry about the intake. But short of that, I wouldn't worry too much. If you were really worried, either have the intake anodized or powdercoated.

'JustDreamin'
 

Lynn D. Brown

New member
Re: Methanol- corrosive?

Mike,

I have been using Methanol (MeOH) for years, and it tended to screw up my injection pump if I leave it in contact with it. So, I got an alcohol solenoid from Summit to isolate the MeOH in the little bottle from the pump. It was a bit expensive ~ $100.
 
Top