330 V-8 BigFord grain truck

filled that rascal with gas couple weeks ago and parked it on a hill . , started it today and it seemed to be flooding ,didnt need much choke to fire up , But Run horrible , wouldn't idle in the 15 degree temps ,. opened the hood and saw the entire engine compartment sprayed up with gas and oil ?????.. Gas had apparantly filled th crankcase with GAS??just replaced the fuel pump couple months back , could the carb had siphoned gas from the tank???.. It was sitting on a downhill slope ? ... It is in need of a rebuild , And i hope that Cures it...

Carb has to be lower than the tank fuel level to siphon.

Does it have an electric fuel pump. If so, it probably ran and ran and ran.

typical mechanical lever fuel pump?? carb was indeed lower than the full tank .. is it POSSIBLE ???

Yes it is. The fuel pump check valves can be a bit tired and pass gasoline forward flooding the engine. I have seen it several times. My jeep did it when I had a vertical tank in the bed, tractors do it often when the owner does not shut off the fuel, and a friends 409 chevrolet did it when he had it jacked up 3 feet in the rear to change diff gears. That engine blew off all its sheet metal in one powerful blast: oil pan valve covers and seals. (blew the hood up and bent to scrap as well.)

You just did a sludge removal cleansing, put new oil and filter in it and away you go. Jim

j,

Years ago I had a 1974 Dodge Coronet station wagon with a 318 engine. The fuel pump developed an internal leak that allowed gas to get into the engine. Fortunately, I had pulled the dipstick to check the oil and found gas in the oil before any damage was done. Replaced the fuel pump - fixed the problem.

Tom in TN

Your truck probably has a vented gas tank cap so this could probably not have happened to you.

Have an 86 Chen 1 ton. Left it parked out in the sun one summer and not used for several weeks. Carb ABOVE the fuel tank. Went to start it and wouldn't turn over. Did a bunch of checking and finally pulled the dipstick and the crankcase was full of gas. Engine hydrolocked.

Only thing I can figger was that the UNVENTED fuel cap caused pressure build up in the fuel tank and forced fuel past the carb needle and flooded the engine.

Yes it can and it could be either the fuel pump or the carb. Many years ago i was working at a Ford dealership and we got in a new T bird that was backed on the car carrier with the nose down . It was one of the first T birds with a 429 When the truck driver went to start the car to drive it off it would not start , driver comes in to my area and asked if we had a battery charger as he thought it was a dead battery from maybe a interior lite left on . I told him go see the service manager and he would get the lot boy to come and jump start it . The service manager called for the lot boy and he got the 68 Bronco we had for our lot dog and it had a Goodall start pack . They opened the hood and hooked up the startall and when the driver hit the key all we heard was a huge explosion and a fire ball and the T bird bronco and the car below and the back end of the trailer on fire . It blew the oil pan and both valve covers off that 429 . She was crispy crittered to bad to tell where the problem was as anything made from alum. was just a glob . The lot boy suffered second degree burns and the driver was not hurt .Good thing we were only a half mile from the fire dept. We used every fire extinguisher we had and were not gaining on it.So you lucked out with it not blowing up on you .

Welcome back, Vet!