racor - water separators

Ken Cross · May 3, 2015

It all operates pressurized and no air is allowed in the system, so it shouldn't matter where it's mounted. I'm pretty sure ours is higher than the pump.

Ken

capejt · May 3, 2015

I've always mounted it at about the same level, if for no other reason, to reduce stress on the pump, but I agree with Ken. It probably doesn't matter that much. One thing to remember tough, there are relatively new (past five or ten years) regulations on how close to the engine it can be. I know this because it was brought to my attention after a survey. There isn't all that much room in my engine compartment, and the filter was mounted about a foot or two from the engine which apparently is a "no-no". There's concern about the heat factor on a plastic fuel filter. They do make a heat shield for most models.

centerline · May 3, 2015

Jack said:
Hi all,

this probably sounds silly to some but...

i want to upgrade my racer water separating filter and was just wondering if there is any reason i can not place it physically higher than the fuel pump?

i don't know if there is any gravity flow issues to consider or not.

thanks for any advice.

J&R

KEN is right in that it shouldnt really matter.... but there are things that can be done to make the system more efficient and easier to bleed when the conditions surrounding the bleeding process could make it a very difficult process.

A primary filter should be mounted before the lift pump and lower if reasonably possible. This allows for the air to naturally pass to the pump after a filter change...

The secondary filter should be mounted between the lift pump and the injection pump.. and, if it is equipped with a bleeder screw, it should be the highest point in the system so the air can be bled from it when necessary..
If there is no bleeder screw on the secondary filter base, and the bleeder screw is at the injection pump, then the secondary filter should be mounted lower than the injection pump...

a properly working lift pump will not allow fuel to back flow when the secondary filter is removed or the bleeder screw is opened, BUT there needs to be a shutoff valve between the tank and the primary filter so it can be shut off to prevent backflow when the primary filter is removed.... this will eliminate unnecessary priming time.

racor - water separators

Jack

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Ken Cross

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capejt

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centerline

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Jack

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