Stanadyne DS Injection Pump in Relation to Aftermarket Relocation and Cooling Devices – UnderhoodService

Stanadyne DS Injection Pump in Relation to Aftermarket Relocation and Cooling Devices

Jasper Engines & Transmissions is aware of several aftermarket relocation and heat exchanging devices that are being marketed with claims that they decrease the operating temperature of the Stanadyne DS Pump Mounted Driver (PMD) improving its reliability.

Jasper Engines & Transmissions is aware of several aftermarket relocation and heat exchanging devices that are being marketed with claims that they decrease the operating temperature of the Stanadyne DS Pump Mounted Driver (PMD) improving its reliability.  

These devices often involve modifications to be made to the wiring harness between the engine and the injection pump. The PMD is located on the side of the injection pump in an effort to dissipate the tremendous amount of heat it creates during operation. The fuel passing through the injection pump helps to dissipate that heat efficiently and consistently during all engine conditions. Other methods of cooling cannot maintain this consistency throughout all conditions that may be encountered.

Another issue that arises from the relocation of the PMD concerns the wiring harness. By moving the PMD the harness may be extended, spliced into, or stretched to make the necessary connections. This causes numerous problems from added circuit resistance, poor connections, and voltage drops across splices. These can cause symptoms that lead technicians to replace the injection pump, or the PMD, unnecessarily. Symptoms like hot stall, no start, and fuel control solenoid DTC’s are all commonly immediately diagnosed as a failed PMD or Injection Pump, and in many cases are simply circuit related issues.  

Each injection pump JASPER sells is coated with a sealing lacquer in all critical areas including the PMD and the harness. JASPER has spent several years monitoring DS injection pumps that have been returned from the field after being diagnosed as defective. We have determined that relocation, and aftermarket heat exchangers, are not beneficial to the life of the PMD or the reliability of the injection pump as a whole.

For more information on the JASPER line of quality remanufactured diesel engine fuel components, call (800) 827-7455 or visit www.jasperengines.com.

You May Also Like

Spark Plug Replacement

Here are some tips to follow when replacing a spark plug.

Every time a spark plug fires, the spark burns a few molecules of metal off the plug’s electrodes. Over time, this eats away the electrodes and rounds off their sharp edges. The erosion gradually increases the gap between the electrodes, which, in turn, increases the firing voltage required to generate a spark. Eventually, the point is reached where the ignition system fails to produce enough voltage and the plug misfires.

What Happened To Turbo Lag In Today’s Engines?

Yesterday’s turbo lag was eliminated thanks to years of development and a bit of clever engineering.

Understanding Engine Timing – Chains, Gears and Belts

Perfect timing is critical in the performance world, and now, it’s required by your regular customers too.

Cartridge Oil Filters

Mistakes made can result in costly comebacks.

Aging Plastic Intake Components May Cause Leaks

BMW valve covers and intake manifolds made of plastic are susceptible to warpage and gasket failure.

Other Posts

Five Spark Plug Service And Replacement Tips

Most articles will tell you to use a torque wrench, but they never explain why.

10 Alternative Uses For A Smoke Machine

Don’t limit yourself to just checking emissions controls – use your smoke machine to check numerous vehicle systems.

Volvo Engine Service

There are many combinations for the Volvo modular engine.

Improving Turbocharger Longevity

It is estimated that by 2022, 50% or more of vehicles sold in the U.S. will have one or more turbochargers under the hood.