I want to install a fuel filter w/ water separator between the fuel tank and the fuel pump. My thinking is that catching any water before it gets to the carb, can only be a good thing.

Can I get away with the fuel filter between the tank and the mechanical fuel pump, or does it need to be on the pressure side?

I think a fuel / water seperator is a diesel engine item.

I am not sure that a gasoline engine needs one.

Over the years chrysler cars came from the factory with a fuel filter that had 3 ports in, out, and vapor / vapor return.


Greg

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a diesel engine item


true,, because diesels all run fuel injectors and close tolerance fuel pumps, oil and water does not mix and the water content has terrible lubrication properties. Water in diesel fuel will take out the injectors and pump.

Modern cars also have injectors and fuel pumps, but with lower engine static compression and looser tolerances in the injectors and fuel pumps due to gasoline being more fluid than diesel and easier to vaporize, water in the fuel is not as hard on the fuel system components. Also most modern gasoline mixes have some kind of alcohol blended in, the alcohol helps to absorb and disperse water that may get mixed into the gas.

But with todays EPA gasoline mix requirements as well as local environmental laws concerning the integrity of bulk gasoline transport and storage, water in the gas should not be an issue.
About the only way water could be getting in the gasoline is due to condensation in the car's gas tank while the car sits. If that is an issue, for long term storage completely drain the tank and store it empty. For short term storage, keep the tank full, do run it to complete empty about every six months then re fill. It that is an issue investigate a smaller gas tank.

Concerning carbureted engines, a very small percentage of water in the gas will not really affect a gasoline engine with a carburetor, but it will affect the inside of the steel gas tank and steel gas lines, they will rust from the inside out.

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Thanks guys.

Sounds like I am barking up the wrong tree.

I was thinking a water separator would prevent/limit corrosion on the inside of the carb. I have seen gas settle in the glass sediment bowl of an old tractor, and figured a good size fuel filter with water drain would do the same thing...

Yeah I have several tractors and an old gas powered compressor with the glass bowl filter. They made a bigger version for tractors around Ford 8N size. They were great at separating gas and water for sure. you could add one, not crazy about gas in a glass bowl on your truck/ but if you must have one I would certainly put it high up under the hood so you avoid road hazards breaking that bowl.
And somewhere under the hood away from exhaust heat, maybe over a fender well