is pump gas ok to use in the tornado engine

[mochicrunch]

I just bought a stock ( faithfully light) restored m-715. I KNOW NOTHING!!!NOTHING. The previous owner says he uses leaded gas additive, because the valves will burn. Is this so ?

[mochicrunch]

[QUOTE=mochicrunch;126933]I just bought a stock ( faithfully light) restored m-715. I KNOW NOTHING!!!NOTHING. The previous owner says he uses leaded gas additive, because the valves will burn. Is this so ?

[Binford]

Modern gasoline is safe to use in the stock M715 engines. No additive is needed. I had the same question when I first got my truck.

The only potential problems you might run into with modern fuels is some of the gasket material such as in the fuel pump cannot handle the alcohol or other such additives in modern fuel formulas. No additive you can add will eliminate this. Just a rebuild of the fuel pump using modern gasket materials will work. You'll know you need to do this is the fuel pump doesn't work anymore.

Please note that we have a variety of forums for each type of post and make your posts in the appropriate forum. This question of yours best fits in the "Stock" forum, so I have moved it there.

[brute4c]

You dont need the lead additive in the 230 as it has hardened valve seats...even before it was needed for unleaded, they were in there. Not having the hadened seats is when they are needed.

Binford has covered the rest perfectly.

[mochicrunch]

You guys are great ! So many rapid responces . I see now that I'll be amongst my own kind

[wolf.dose]

None of the old engines need a lead replacement additive.
The cast iron heads of WWII and later and the blocks of side valve engines were usually cast of a chrom nickel alloy. This is a simelar matierial quality as the valve seats inserted into aluminium cylinder heads. Any Alu cylinder head without valve seats will not survive the first 10 miles of its liver. Alu is to soft to withstand the forces of the operating valves. So from the beginning of Alu heads the exhaust valve seat normally was made of tool steel or simelar hight quality stuff, the inlet seat at least was made of hight quality brass.
The leaded fuel had an additive called ethylene dibromide to prevent the forming of lead oxide during combustion and depositing on spark plug electrodes, valve seats and valve stems. (sorce: Educational Manual EM 951 Course 2, War Department, Washington 25, D.C. (7 April1944), page 60).
Hope this helps.
Wolf