Dorman 926-391 4WD vacuum check valve for the 2010 Ford F-150 V8 4.6L or 5.4L, the 2010-2014 F-150 V8 6.2L, the 2011-2014 F-150 V6 3.5L, 3.7L or V8 5.0L and other vehicles helps keep proper vacuum levels in the 4WD system. It is a one-way check valve for the 4WD actuator vacuum.
- Part of the Dorman OE Solutions line
- Made to precise specifications to help restore proper vacuum levels in the 4WD system after the old valve has failed
- EPDM material for reliable performance and service life
- Three vacuum ports for connecting the 4WD vacuum lines
Quick facts
- Part: Dorman 926-391 4WD vacuum check valve
- Fits: the 2010 Ford F-150 V8 4.6L or 5.4L, the 2010-2014 F-150 V8 6.2L, the 2011-2014 F-150 V6 3.5L, 3.7L or V8 5.0L and other vehicles
- Material: EPDM
- Condition: New
A 4WD system that is slow to engage or release can mean this valve is no longer holding vacuum, though a cracked vacuum line or a faulty 4WD actuator can be behind the same signs, so find the cause before replacing anything. The listing is one valve, and the fitment calls for a single valve per vehicle.
Fits
As a direct-fit replacement, this 4WD vacuum check valve also suits the 2010-2014 Ford Expedition V8 5.4L, the 2015-2017 Expedition V6 3.5L, the 2010-2014 Lincoln Navigator V8 5.4L and the 2015-2017 Navigator V6 3.5L. If your vehicle isn't named here, look for its year and engine in the "Vehicles it fits" section on the product page.
Specifications
Fit and size
- Quantity per vehicle: 1
- Length: 17 in
- Outer diameter: 0.39 in (10 mm)
- Port outside diameters (3 ports): 5 mm, 5 mm and 3 mm
- Connector shape: Round
- Vacuum fitting sizes: included
Build and materials
- Material: EPDM
- Condition: New
- Country of origin: China
In the box
One 4WD vacuum check valve.
Interchange: AL3Z3A788A · BL3Z3A788A
Frequently Asked Questions
Does the Dorman 926-391 fit a 2010-2014 Ford Expedition V8 5.4L?
Yes, Dorman 926-391 fits the 2010-2014 Ford Expedition V8 5.4L and the 2015-2017 Expedition V6 3.5L. For other vehicles, use the "Vehicles it fits" section.
What is the Dorman 926-391 4WD vacuum check valve made of?
This 4WD vacuum check valve is made of EPDM and has a round connector with three ports. The ports measure 5 mm, 5 mm and 3 mm outside diameter.
Is this 4WD vacuum check valve sold as a single piece?
Yes. The package holds one 4WD vacuum check valve, and the fitment calls for one valve per vehicle.
How can I look over a 4WD vacuum check valve for damage?
With the engine off and cool, look over the valve and its vacuum lines for cracks, splits or loose connections. A shop can test whether the valve holds vacuum.
Does Dorman 926-391 replace part number AL3Z3A788A?
Yes. AL3Z3A788A is one of the cross-reference numbers Dorman 926-391 replaces, along with BL3Z3A788A.
