DIY 4.6L & 5.4L Cooling System service - Flush, Thermostat, & Hoses

Engine coolant breaks down over time, stimulating corrosion and also leaving store in the engine"s cooling system. Flushing the cooling system periodically promotes longevity that the radiator and maximizes cooling system performance. It is equally essential to routinely replace the thermostat and also radiator hoses, which can, crack, end up being soft, and lose your integrity. While a usual flush involves special equipment that pumps brand-new coolant v the engine and also collects the old fluid, the procedure explained herein is just as effective and, ideal of all, deserve to be perform by anyone with an easy DIY skills.


Related Topics:


Ford F-150 infection Service
5.0L, 5.8L V-8 Thermostat Replacement
4R70W Transmission business & Filter Replacement
4.6L, 5.4L V-8 Starter Replacement

Ford 4.6L, 5.4L Cooling device Service and also Engine Coolant part Numbers

To properly business the cooling system, friend will need (1) overflow tank cap, (1) thermostat, (1) thermostat housing gasket, (1) upper radiator hose, (1) reduced radiator hose, 3 come 4 gallons that engine coolant, and also 10 to 15 gallons that distilled water. A concentrated engine coolant is forced for the cooling device flush actions outlined herein; a prediluted coolant will NOT work with this procedures.

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Model Year(s)

Engine(s)

Ford part Number

Application Notes

Engine Coolant

1997 - 2002

4.6L, 5.4L V-8

Ford eco-friendly engine coolant/antifreeze Motorcraft VC-5

2002 - 2010

4.6L, 5.4L V-8

Ford gold engine coolant/antifreeze Motorcraft VC-7-B

Radiator Overflow Tank Cap

1997 - 2010

4.6L, 5.4L V-8

Motorcraft RS527

All version years

Thermostat

1997 - 2010

4.6L, 5.4L V-8

Motorcraft RT1234

190° F thermostat

Thermostat real estate Gasket

1997 - 2010

4.6L, 5.4L V-8

Motorcraft RG571

All version years

Upper Radiator Hose

1997 - 2003

4.6L V-8

Motorcraft KM3047

N/A

2004 - 2008

4.6L V-8

Motorcraft KM4739

N/A

2009 - 2010

4.6L, 5.4L V-8

Motorcraft KM4992

N/A

1997 - 2003

5.4L V-8

Motorcraft KM3051

N/A

2004 - 2008

5.4L V-8

Ford 4L3Z-8260-DA

N/A

Lower Radiator Hose

1997 - 2003

4.6L V-8

Ford 3L3Z-8286-BA

All journey types

2004 - 2008

4.6L V-8

Motorcraft KM4738

All drive types

2009 - 2010

4.6L, 5.4L V-8

Motorcraft KM4994

All drive types

1997 - 2003

5.4L V-8

Ford F75Z-8286-MA

2 wheel journey models only

1997

5.4L V-8

Ford F75Z-8286-KD

4 wheel drive models only

1998 - 2003

5.4L V-8

Motorcraft KM4744

4 wheel journey models only

2004 - 2008

5.4L V-8

Ford 4L3Z-8286-BC

All journey types

If her engine come from the factory with green coolant, than you"ll want to usage Ford/Motorcraft eco-friendly antifreeze. Likewise, if your engine originally came indigenous the factory with yellow coolant, you"ll desire to usage Ford/Motorcraft yellow antifreeze (see part numbers in chart above). Execute not mix and also match coolant types.

The ide behind a DIY cooling device flush is straightforward - continuously drain, refill, and also run the cooling system in order come purge every the old engine coolant. ~ above the last refill, we"ll carry out some fast math in order to acquire the proportion of antifreeze-to-water correct. Arrangement on security the much better half the a day come flush your cooling system, as regular warm up and cool down durations will be required.

The following procedures are based upon the 4.6L and also 5.4L fitted Ford F-150s, but the basic strategy can be used universally to nearly any vehicle and also any engine. The procedures listed below were performed on a 1997 to 2003 generation F-150; some device sizes and component places may show up different 보다 those mentioned.

Upper/Lower Radiator hose & Thermostat Replacement

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• through the engine cool, drainpipe the radiator into a suitable container. Over there is a petcock on the passenger side, bottom corner of the radiator with a tiny drain water tap attached the runs outside of the framework rail (if the hose is missing, install one). Ar a big drain pan in ~ the drainpipe hose, then loosen the petcock through a 19 mm wrench till coolant starts to drain. Remove the radiator/overflow tank cap for quicker draining, although it will be a slow process.


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• download the new thermostat and thermostat o-ring, and also then reinstall the housing and power steering fluid tank bracket (use anti-seize on every the bolt threads). Pay close attention to the arrangement of the thermostat, it need to be collection in the inlet like the one in the picture at left.

• Clean the upper radiator hose inlet fitting, then install the brand-new radiator hose in turning back order. Verify the the clamps on every hoses are appropriately secured.

• install your new radiator/overflow tank cap, then proceed to the do the washing up procedures.


DIY Cooling device Flush Procedures

1) through the radiator drain petcock closed, completely fill the cooling device with distilled water only (do not usage tap water). Start the engine and enable the van to reach operating temperature. This ensures that the thermostat opens and water is circulated through the whole system.

2) once operating temperature is reached, rotate the engine turn off and enable the engine come cool completely. execute not attempt the next step until the engine has actually cooled - major injury might occur.

3) v the engine cool, drainpipe the radiator. As necessary, empty your drain pan into the empty water jugs. This water need to be recycle at an suitable location as it is considered hazardous waste.

4) Repeat steps 1 v 3 at the very least two more times. The more times this process is repeated, the an ext thorough the flush. In our experience, repeating this process much more than three times has actually negligible results as the antifreeze concentration is reasonably low at this suggest and many of the old coolant has actually been changed by clean water.

5) at this stage, the engine should have actually been flushed a minimum of three times and also is, for every intents and purposes, fully full of pure distilled water. Prior to proceeding, make sure your drain pan is completely empty together it is important to measure up the amount of coolant gotten rid of for the final process.

6) reference your owners manual and find her engine"s cooling device capacity. This truck"s manual states the the full cooling system capacity is in between 5.14 and 5.4 gallons. You have the right to take an mean value, yet we just assumed the larger capacity (the difference for our purposes is relatively small and assumed to it is in negligible in identify the proportion of water-to-antifreeze). A full capacity the 5.4 gallons method that our engine requirements to have actually 2.7 gallons that distilled water come 2.7 gallons that antifreeze concentrate. Therefore, we need to drainpipe 2.7 gallons the water from the system and replace it v 2.7 gallons that antifreeze because that a perfect 50/50 ratio. Prediluted coolants room not compatible through these business procedures.

7) drain the radiator as soon as again via the petcock. Once complete, to water the water into your north 1 gallon water jugs and also use lock to measure the amount of water drained. In ~ this point, us were able to drain about 2.5 gallons that water native the radiator. Because we should remove a minimum 2.7 gallons, us pulled the reduced radiator hose. One more 0.5 gallons were drained.

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8) Determine how much distilled water and also antifreeze must be added. Our system capacity is 5.4 gallons and also we gotten rid of ~3.0 gallons of water in our last drain. Therefore, the system consisted of 2.4 gallons that distilled water in ~ this point. Since a 50/50 mixture is desired, we"ll need to add 0.2 gallons that distilled water and also 2.7 gallons the antifreeze.

9) fill the mechanism with antifreeze with the radiator/overflow cap, then peak off the system with distilled water as/if necessary. Always fill v the forced amount the antifreeze first; this prevents you native inadvertently including too lot water. For us, we added ~ 2.7 gallons that antifreeze and also then included distilled water till the level reached the "cold" variety line on the overflow tank. If for some reason you had actually to add significantly an ext water than calculated in step 8, a mistake to be made and also you"ll require to double check your measurements. It is imperative that the correct amount of antifreeze is added; severe damage may occur in cold weather if the ratio is substantially off. If miscellaneous doesn"t include up, retrace her steps. If the overfill tank becomes full before you space able to include the required amount, take it the truck for a brief drive to work out any type of air balloon in the system, then proceed filling the cooling system.

10) allow the van to reach operation temperature, climate verify there room no leaks and also that the cooling device is filled come the appropriate level. If these measures are carry out correctly, her calculations must align through the amount of water/antifreeze included to the cooling system.