How much would it cost to take a 1967 Ford F250 engine that runs on leaded gas and make it run on unleaded gas

Answer 1

Go ahead and use it the way it is. It would be unlikely
that the valve seats will fail. If they do, the fix is not all
that much. It would involve removing the heads for
a machine shop to replace the seats. But as I said,
they will more than likely be fine. Failures of that type
were far and few between.

Answer 2

I wouldn't worry about it, I have a '69 Ranchero with a 351W that doesn't have unleaded heads, and I just put 92-93 octane pump gas (or the highest octane available) in it to keep it from spark knocking. Don't use the fuel additives or octane boosters, they can often do more harm than good and don't really make your motor run cleaner or better at all.

Answer 3

You should change the valves. If you do the tear down yourself bring the heads to a machine shop where they will replace the valves the properly seat the new ones in depending what the machine shop charges you can do it for around 150.00. Having a garage do it your looking at around $700.00 or more.

The older vehicles that ran on leaded fuel used different valves (these valves required a lubricant) Leaded fuel was a lubricant. To-days fuel is unleaded so the valves are designed to not have a lubricant.

Answer 4

your worried about nothing. change the oil often and run the motor. The 429 in a 69 tbird ran more then 450,000 miles well into the unleaded years with no problem finding the high octane needed is why it was taken off the rode. the old ford motors are built to run and run

Answer 5

Old 460 cubic inch or 360 cubic inch ford engines only got 6 to 10 miles a gallon with four speed manual transmissions, automatic 3 speed ger box was less economical. Two or 4 BBL Fomoco carburator or Holley. Ok future time. Modern Trucks have lots of differences. Engine fuel management eight injectors electronic control of fuel spark and air flow. Modern engines to last longer make more power and get better mileage electronic torque control saves transmissions. Old 1967 engines did not run EGR to cool combustion temps stellite valve seats and stainless valves roller rockers and cams. Today low friction is the name of the game. My reccomendation is drive a new truck and see.

Answer 6

just us a lead additve or top cylinder lubricant addative the main parts of the engine affected by unleaded gas is the valve sets valve stems and valve guides see the lead acts as a lubricant

Answer 7

it variety of feels as though the engine seized. this potential the metallic areas of the engine have been broken adequate by a loss of lubrication to create a situation that stops the motor (pistons, crankshaft, camshaft) from turning. a minimum of have somebody (a pal/coworker) who's conscious of the working principals of an inner combustion motor evaluate your motor's prestige, in case you do no longer comprehend anybody like that, then you definately are caught having a mechanic try this, which will value money.

Answer 8

It will just take some carb adjustments to get it set up right. Might want to add some additives to it for a while to "ween" it off of the leaded gas. I know they used to recommend that but not sure if they still do.

Answer 9

mix a quart of motor oil in with each tank of gas. the motor oil will act as a top end lubricant, and will act as the lead "buffer" which will keep the soft valve seats from burning out.

Answer 10

If you want to put hardened valve seats, a few hundred. If the engine is running good just use lead substitute instead.