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2003-2007 Ford 6.0L PSD Coolant Filtration System

Preserve the life of your Water Pump! OUR #1 SELLING COOLANT FILTRATION SYSTEM FOR 5 YEARS RUNNING! The original Coolant Filtration Systems. Superior design, parts and customer service... THANKS!!!
Your Cost:
From $160.00 to $180.00
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Product Description

  • F-Series includes a bracket and does not include ball valves
  • E-Series / Frame Mount does NOT include a bracket but DOES include ball valves and more hose to facilitate mounting on the frame.
  • Please review pictures to see what is included in your chosen option before ordering.


 Billet Aluminum Housing


(Cut away of a clogged oil cooler)

One HUGE benefit of the installation of the 6.0L coolant filter is the protection of the Oil Cooler and consequently, the EGR cooler. The coolant passes through the oil cooler before it heads towards the EGR cooler. The oil cooler becomes clogged with debris in the cooling system. The EGR cooler passes coolant over an exhaust flow to cool exhaust before it re-enters the intake. Without sufficient coolant passing through the EG cooler, the EGR cooler fails. When the oil cooler plugs, you must replace them. The egr coolers list for $500.00 and the oil coolers list for about $250.00 and labor estimates are 8 hours to replace them. Here is a picture showing the location of the cooler. Keep in mind, the turbo, oil cooler, and all related intake plumbing is already removed.

Coolant filters are not a new idea to the diesel engine world. They come in most OEM applications for medium duty and OTR tractor trailer rigs. The idea was somehow tossed aside for light duty applications, most likely due to cost. For our light duty trucks it is a very important issue that needed to be addressed. Many diesel engines - like the Powerstroke - are cast with sand in the process. This sand is NOT completely removed from the system. In fact, much of this sand leaches out of the casting over time. The sand wears away at water pump seals, hoses and radiators. Removal of this sand can greatly increase your water pump life. Diesel engine coolant also contains additives that are designed to protect the cyclinders from cavitation erosion. As these chemicals are used, they change from a liguid to an organic / solid form. As the solids erode from the cylinder linings, they become an inert particle left behind floating around actually causing more damage, clogging coolers, wearing away seals, etc. This is called sediment fallout. Sediment fallout is very abrasive.

We custom CNC machined a tee to tap into the heater line. We did this so there was no extra weight hanging off the heater hose than necessary. This machined piece weighs only ounces. In addition to the machined fitting a custom STAINLESS STEEL mounting bracket has been designed specifically for EASY bolt in on the 6.0L Ford PSD.  All clamps are 100% stainless steel as well, even the clamp screws.

The DIESELSITE Coolant Filter Install Kit will remove the loose particles in your cooling system and give your water pumps, radiators, water necks and radiator hoses the protection they need from these abrasive materials.  Wear is virtually eliminated by the removal of undesirable elements in your system. 


The DIESELSITE Coolant Filter Kit is a bypass-style system that filters a small amount of the coolant on each pass.  By using a spin on filter we make it easy for you to change your coolant filter at regular intervals.  These filters will remove all solid particles -- new or old.  It is never too late to install a coolant filter in order to extend the longevity of your cooling system components.  While you cannot reverse the damage that is already done, you can eliminate further damage from occuring.  This kit is a must for every truck. 
In the past 6 years of doing business, we have seen a pattern of water pump failure. If you are one of the unlucky owners who have lost your pump between 40,000 and 80,000 miles it isn't too late to protect your new pump.  While some damage to your pump may already be done, a coolant filter install kit will extend the longevity of your pump before it fails.  AND, it will definitely insure that your next water pump will last much longer than your first one did.
The DIESELSITE Coolant Filter Install Kit includes all fittings, Stainless Steel bracket, hose and stainless steel clamps needed for installation.

Recommendations on filter changes:
Use one filter every three months for the first nine months after installation. The lack of flow into the expansion tank is an indication that your filter is plugged. Change the filter if it should plug before the 3-month interval. After the 4th filter is installed your filter should be changed once per year.


Dear Bob,

 I purchased one of your coolant filters for my 6.0L PSD - 2003 Ford Excursion and am now a true believer in your system. I installed your set-up at 51, 090 miles and just changed it at 57,150 (6,060 on filter).  Keep in mind that the dealer drained and replaced my lower radiator hose at 30,000 miles and I flushed my system 5 times with distilled water before installing... and look what your coolant filter system did to filter the sand, grit and sludge from my cooling/heating system!!!  -- Jeff C.

Most of the pics shown below were sent by Jeff C. after his first filter change. THANKS FOR THE GREAT PICS JEFF !!

Above Showing optional ball valves- These can be found in related items below.

Above Showing optional ball valves- These can be found in related items below.






Question:I've changed the spin on filter recently, using a different filter than you sent with your systems, why am I seeing an excess amount of debris in my cut open filter? When I cut this filter open, there are now tablespoons of sludgy debris - nothing like the first time. Is my choice of filter better or worse?  Is there something wrong with my engine?

Answer: If you are seeing sludge and spoonfuls of debris, you must be using an SCA(Supplemental Coolant Additive) charged filter. They are packed with a solid particle/tablets from the manufacturer that release a chemical over time. What you are left with is a pile of debris inside of your filter. They are not filtering better, you just have more to filter now. This debris did not come from your engine. It is simply from using the wrong filter. The debris is travelling through your system now, so you have added more debris to your existing problem.  You are constantly releasing then recapturing the same debris that you have added. Be aware that the coolant manufacturer clearly states you should NOT use SCAs in the 6.0L Premium Gold system. The additives can be labeled as SCAs or BTAs - neither are acceptable. Use the non-charged filters and you will see actual engine debris only. So, while you can purchase replacement filters locally, make sure they are non-charged before you purchase. DIESELSITE USES AND SELLS ONLY NON-CHARGED FILTERS FOR OUR SYSTEMS.

A second and bigger problem with using SCA/BTA charged filters is that they are designed for much larger cooling systems than are found on the Powerstroke. A charged filter would be majorly overdosing the system on additives.  This results in an extreme amount of sediment fallout, which will cause more wear then the small amount of debris you were trying to stop to begin with. So, there may not be something wrong with your engine now, but to continue using the filters could definitely cause major issues down the road with EGR coolers, radiators, water pumps or anything the coolant comes in contact with.


Question:Will a coolant filter rob coolant flow and cause overheating problems?

Answer: No. 
The DIESELSITE Coolant Filter Kit is routed in parallel with the current flow of your coolant system.  The majority of the coolant on each pass takes its normal path. Only a very small amount of coolant that would have travelled through the heater core is "bypassed" from the system to run through the new spin on coolant filter. So, your coolant follows its normal path while that small amount pulled off by our unit is directed through the new spin on filter.  That small amount, therefore, has actually bypassed the heater core.  As this small amount of bypassed fluid leaves the coolant filter, it enters the expansion tank which eventually makes it way into the lower radiator hose and back into the lower radiator hose and resumes its original path. The continual movement of the coolant through the system will eventually insure that the entire system is filtered clean.


 Question:What happens if the coolant filter is plugged and I don't catch it before it stops flowing?

Answer: You would no longer have an effective coolant filter in the system. That is ALL that would happen. Your coolant filter is a "bypass" in your system. Should the flow of this bypass be stopped -- by either an inline shut off valve or a plugged filter -- your coolant would follow its original path through the heater core as it did before the coolant filter was installed. No harm would be done.

Question:How do you know if the filter is working or needs to be changed?

Answer: You can see the output flow of your coolant filter at the inlet of the expansion tank. This is where the coolant sent "bypassed" through the coolant filter re-enters the normal factory flow. When you see the flow significantly slow down or stop, it's time to change the filter. If you see no flow, it is already plugged.  Simply change the filter to resume your filtration.

Question:What are the ball valves for?

The ball valves screw directly into the filter head assembly. They allow you to shut off the flow in both lines so filter changes are cleaner. This means less coolant losses and less mess. The other benefit, rare as it is, if you find yourself without a replacement filter, the unit can be shut off and the truck can be run as usual with no change in coolant flow of loss of coolant.