The HEUI pump, once considered disposable, has become a reliable JASPER remanufactured component. The HEUI pump, pictured above, can be found on the 2003-2004 Ford 6.0L diesel and the International VT365.
The Hydraulic Electronic Unit Injector (HEUI) pump was once considered a disposable piece on a diesel engine. Now Jasper Engines & Transmissions, the nation’s leader in remanufactured drivetrain products, has turned the HEUI pump into a reliable, remanufactured component that customers can install with confidence.
HEUI fuel systems appeared on the market around 1994. Soon the Ford Powerstroke, International DT Series, and the Caterpillar 3126, each had a variation of this system which uses engine oil, under high pressure, to pump fuel into the combustion chamber.
One such pump can be found on the 2003-2004 Ford 6.0L diesel and its cousin, the International VT365. “Oil leaks are one of the biggest issues with these pumps,” says TJ Abrams, JASPER Diesel Quality Group Leader. “JASPER uses critically-sized O-rings to prevent leaks from the rear end sealing plate. Also, 100% of the O-rings within the pump are replaced, along with any discharge fittings, which are a major problem on 1994-2002 Ford Powerstroke diesels.
Another common issue is the loss of flow or pressure. “This is caused by a swashplate turning in the housing when it’s not supposed to,” says Abrams. “JASPER installs a set screw in the housing to prevent the swashplate from turning, and also replaces the thrust washers for the plunger rotor. This is a key wear item that can cause pressure and flow loss.”
Each HEUI pump, just like an engine, is tested after being remanufactured. “Pressure, flow and leaks are scrutinized on a custom-built test stand to ensure a quality product,” added Abrams.
