GM 6.5 Turbo Diesel FSD / PMD Cooler Kit

Contrary to what you might have heard, the fuel injection pump on GM's 6.5 litre diesel is actually a very well constructed and durable unit.

The failure that most 6.5 owners experience is not with the pump, but rather with the PMD or Pump Mounted Driver. We like to call it the Fuel Solenoid Driver, or FSD. This is an electronic driver that mounts on the side of the injection pump.

When in operation, the FSD gives off a great deal of heat. It is mounted on the side of the injection pump in order to dissipate the heat, by using the flow of the diesel fuel through the injection pump. Unfortunately, this does not work well, and the heat build up will cause trouble in several ways:

• The FSD cannot withstand the excessive heat and fails
• Failure of the Optical sensor within the injection pump may occur due to excessive heat, as well the heat transferred to the fuel causes it to lose lubricating qualities resulting in mechanical pump failure

Because of this new location, if you ever need to change the FSD again, you will save at least three and a half hours of labor, because the intake manifold no longer has to be removed.

• Larger mass of aluminum used which absorbs rapid heating of the FSD and dissipates heat better
• Grade 8 fasteners used to secure the FSD to the cooler instead of the "prettier" stainless ones. Stainless fasteners will snap if torqued to the required 23 in/lbs which is necessary to provide adequate clamping pressure between the FSD and cooler for proper heat transfer
• Industrial heat sink compound is used instead of a mounting pad between the FSD and cooler. Heat sink compound provides 100% contact between the cooler and FSD which aids in heat transfer. Compound is proven in industry to transfer better then any pad made
• The FSD is mounted perpendicular to the cooling fins, others parallel. Mounting parallel positions the 2-500 watt transistors mounted on the backside of the FSD to share the same cooling fins. Mounting perpendicular positions the transistors over separate cooling fins, which allows the FSD to run cooler. Bottom line, a cooler running FSD will last longer
• Our mounting location is the coolest area under the hood to mount with the best flow. Mounting on the firewall doesn't allow enough flow to keep the FSD cool. It’s 2-500 watt transistors create a lot of heat. Tests have proven a 20-30 degree difference in FSD temperature from firewall mounting
• Location also allows the original harness to be used with absolutely no stress or strain. No harness extension required, which allows less connections to fail
• Lowest cost professionally made unit. Compare and save.
• Instructions included for a 10-20 minute installation with basic hand tools
• In stock-ready to ship with express shipping available at cost
• Available in "kit" version also, which supplies the cooler, resistor and brand new Stanadyne FSD
• Cooler warranted 1 year for defects in material or workmanship

Not sure if it is your FSD, or your fuel injection pump, call us to set your mind at ease.