okay i need to know how to replace a fuel filter on a 1986 ford f250 diesel
never done this before so pics would be nice thanks

 

I don't have the older 6.9 diesel like yours, I have the 1989 with the 7.3. My fuel filter is a large one on the front pass side of the engine. Does yours have the same filter?

 

The fuel filter is the one on the passenger side front of the engine, it's just like an oil filter.

Screw it off, screw new one on.


When you put a new filter on, be sure to fill it straight to the top before installing it.


It's best to do this when the engine is warm. If it stalls out, you'll need to crank the engine for the fuel to come up (mechanical fuel pump). With the engine warm, at least you won't be fighting a cold engine + air in fuel.


WARNING:

DO NOT crank more than 20 seconds at a time, with a full 2 minute cool down time. Your starter will thank you!

 

is there just one fuel filter just wanted to now

 

Factory issue, yes. As long as no one has switched out the factory water separator for something else, it is just the one on the motor. The factory water separator is between the brake booster and the driver side fender on the firewall.