2024 FORD F650/750 coolant level

If these modified engine performancecharacteristics persist for an extendedperiod and either the service engine soonor powertrain malfunction, reduced power,electronic throttle control light isilluminated, have the system checked byan authorized dealer.
Service engine soon
Powertrain malfunction, reducedpower, electronic throttle control
Diesel Lubrication System
It is important to change the engine oil atthe recommended service intervals orwhen indicated by the information displayto maintain oil viscosity. Extending the oiland filter change interval beyond therecommended interval can negativelyaffect engine performance, fuel economyand engine life. See Engine Oil Check(page 227).
Engine and secondary cooling system
The cooling system contains a primarycooling loop to cool the engine and asecondary cooling loop to cool thetransmission, charge air, and fuel. Thecoolant serves three primary purposes: toprovide heat transfer, freeze pointprotection, and corrosion protection usingadditives.
Vehicles with diesel engines typically areused to carry heavy loads and accumulatemileage rapidly. These two factors maycause the additives in the coolant to wearout in a shorter time. You can find moreinformation about coolant additives andcoolant change intervals in the coolantchapter. See General MaintenanceInformation (page 325). Operating theengine with insufficient coolant or coolantadditive can cause severe engine damage.
Selective catalytic reduction system
Your vehicle is equipped with a selectivecatalytic reduction system designed toreduce emission levels of nitrogen oxidesfrom the exhaust of your diesel engine. Thissystem relies on the use of Diesel ExhaustFluid (DEF) that you must replenish atcertain intervals. Failure to maintain properDEF levels or if the DEF becomescontaminated will result in vehicle speedlimitations or result in your vehicle enteringan idle-only mode. See SelectiveCatalytic Reductant System (page 120).
Minor Troubleshooting Guide
If the engine won’t crank
WARNING: Battery posts,terminals and related accessoriescontain lead and lead compounds. Washhands after handling.
Turn on the headlights. If the lights are dim,do not go on at all or when the ignition isturned to the start position, the lightsbecome dim or go out, the batteryconnections may be loose or corroded, orthe battery may be discharged. If there isa clicking or stuttering sound coming fromthe engine compartment when you turnthe key to the start position, this may alsoindicate a loose or corroded batteryconnection.
Check the battery connections at thebattery posts, cable connection to theengine grounding point and at the starterconnection.
If you suspect a discharged battery, haveit checked and corrected.
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingIntroductionE67028

Engine Oil Pressure Gauge
Indicates engine oil pressure. At normaloperating temperature, the level indicatoris in the normal range. If the pressure gaugefalls below the normal range, stop yourvehicle, switch off the engine and checkthe engine oil level. Add oil if needed. If theoil level is correct, have your vehiclechecked by an authorized dealer.
Engine Coolant TemperatureGauge
WARNING: Do not remove thecoolant reservoir cap when the engine ison or the cooling system is hot. Wait 10minutes for the cooling system to cooldown. Cover the coolant reservoir capwith a thick cloth to prevent thepossibility of scalding and slowly removethe cap. Failure to follow this instructioncould result in personal injury.
Indicates engine coolant temperature. Atnormal operating temperature, the levelindicator is in the normal range. If theengine coolant temperature exceeds thenormal range, stop your vehicle as soon aspossible, switch off the engine and let theengine cool.
Fuel Gauge
The fuel gauge indicates about how muchfuel is in the fuel tank.
The arrow adjacent to the fuel pumpsymbol indicates on which side of yourvehicle the fuel filler door is located.
Note:The fuel gauge may vary slightlywhen your vehicle is moving or on a slope.
Low Fuel Reminder
A low fuel level reminder displays andsounds when the distance to emptyreaches 50 mi (80 km),25 mi (40 km),10 mi (20 km) and 0 mi (0 km) for allvehicle keys.
Note:The low fuel reminder can appear atdifferent fuel gauge positions depending onfuel economy conditions. This variation isnormal.
Distance to Empty
Indicates the approximate distance yourvehicle can travel on the fuel remaining inthe tank. Changes in driving pattern cancause the value to not only decrease butalso increase or stay constant for periodsof time.
Configurable Gauge
Transmission Fluid Temperature Gauge
Indicates transmission fluid temperature.At normal operating temperature, the levelindicator is in the normal range. If thetransmission fluid temperature exceedsthe normal range, stop your vehicle as soonas possible and verify the airflow is notrestricted by snow or debris blockingairflow through the grille.
Special operating conditions such assnowplowing, towing, or off-road use maycause higher than normal operatingtemperatures. See Special OperatingConditions Scheduled Maintenance(page 335).
To lower the transmission temperatureinto the normal range, alter the severity ofyour driving conditions. Operating thetransmission for extended periods with thegauge in the higher than normal area maycause internal transmission damage. If thegauge continues to show hightemperatures, see an authorized dealer.
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingInstrument Cluster

Door Ajar
Displays when the ignition is onand any door is not completelyclosed.
Electronic Locking Differential (If
Equipped)
Illuminates when using theelectronic locking differential.
Engine Coolant Temperature
If it illuminates when your vehicleis moving, this indicates that theengine is overheating. Stop yourvehicle as soon as it is safe to do so andswitch the engine off. Have your vehiclechecked as soon as possible. See EngineCoolant Check (page 238).idk
Engine Oil Pressure
If it illuminates with the enginerunning, or when you are driving,this indicates a malfunction.Stop your vehicle as soon as it is safe todo so and switch off the engine. Check theengine oil level.
Note:Do not resume your journey if itilluminates despite the level being correct.Have the system checked as soon aspossible.
Exhaust Brake On (If Equipped)
The exhaust brake indicator lightilluminates when you switch theexhaust brake on.
Fasten Seatbelt
Illuminates and a tone soundsto remind you to fasten yourseatbelt.
High Beam
Illuminates when you switch onthe high beam headlamps. Itflashes when you use theheadlamp flasher.
Hydromax
If the light illuminates andremains on when the key is in theon position or the engine isrunning, this indicates inadequate hydraulicbooster pressure or reserve pump systemfailure. Stop the vehicle as soon aspossible and have your vehicle checked.
Low Fuel Level
Illuminates when the fuel levelis low or the fuel tank is nearlyempty. Refuel as soon aspossible.
Parking Brake Warning
Briefly illuminates when youswitch the ignition to the onposition, with the engine off. Italso illuminates when you apply theparking brake. If the park brake lamp doesnot illuminate at these times, seekimmediate service. Vehicles with the powerparking brake option: If the park brakewarning lamp begins to blink after settingthe parking brake, this may indicate afailure in the parking brake system. Havethe system checked as soon as possible.Driving extended distances with theparking brake engaged can cause brakefailure and the risk of personal injury.
Parking Lamps
Illuminates when you switch thelow beam headlamps or theparking lamps on.
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingInstrument Cluster E163170 E103308 E67022 E171217 E71880 E67019 E146190 E208810 E71341

VEHICLE INSPECTION
INFORMATION
To make sure your vehicle is ready tooperate, conduct a pre-trip inspection atthe beginning of each work period. Followthe steps listed in this section to verify aproper vehicle inspection procedure.
WARNING: Exercise great cautionwhen working on a vehicle equipped withan automatic fan clutch. The fan startsin motion only after the engine coolantreaches a predetermined temperatureor the refrigerant pressure (if equippedwith air conditioning) reaches apredetermined setting. The fan starts atthis point with no advance warning.Never reach near, or permit objects toprotrude into, the fan blade radius whilethe engine is running as this could resultin vehicle damage, personal injury ordeath.
WARNING: Do not operate thevehicle if any suspension conditionslisted in the following charts are evident.Loss of steering or suspension couldresult in property damage, personal injuryor death.
WARNING: If a wheel must bechanged, obtain expert tire service help.Mounting and un-mounting of tiresshould only be performed by a qualifiedtechnician using necessary safetyprocedures and equipment, otherwisethe result could be property damage,personal injury or death.
Note:Always make sure you apply theparking brake before starting the engine.
Engine compartment (with engine off)
Use the dipstick to verify the oil level is in the proper operatingrange. See Engine Oil Dipstick (page 227).Engine oil
Look through the plastic reservoir and verify the coolant levelis within the proper operating range. Do not remove thepressure cap until the coolant has cooled. See EngineCoolant Check (page 238).
Engine coolant
Verify that the fluid level is in the proper operating range. SeePower Steering Fluid Check (page 246).Power steering fluid
Remove the master cylinder caps and inspect the fluid level.See Brake Fluid Check (page 245).Brake fluid
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingVehicle Inspection Guide

3.Rotate the drain counterclockwise untilthe O-ring is visible. Allow the dieselfuel conditioner module to drain forapproximately 25 seconds or untilclean fuel is observed. Rotate the drainclockwise to tighten it. If no liquiddrains, there may be a clog in the drain.Have the conditioner module servicedby an authorized dealer.
4.Make sure that you fully tighten thedrain valve and then remove thecontainer from under your vehicle.
5.Restart the engine. If the Water in FuelDrain Filter message and lightcontinues to illuminate, have the fuelsystem checked and repaired.
ENGINE COOLANT CHECK -
6.7L DIESEL
WARNING: Do not remove thecoolant reservoir cap when the engine ison or the cooling system is hot. Wait 10minutes for the cooling system to cooldown. Cover the coolant reservoir capwith a thick cloth to prevent thepossibility of scalding and slowly removethe cap. Failure to follow this instructioncould result in personal injury.
WARNING: To reduce the risk ofpersonal injury, make sure the engine iscool before unscrewing the coolantpressure relief cap. The cooling systemis under pressure. Steam and hot liquidcan come out forcefully when you loosenthe cap slightly.
When the engine is cold, check theconcentration and level of the coolant atthe intervals listed in the scheduledmaintenance information. See ScheduledMaintenance (page 325).
Note:Make sure that the coolant level isbetween the MIN and the MAX marks onthe coolant reservoir.
Note: Coolant expands when it is hot. Thelevel may extend beyond the MAX mark.
Maintain coolant concentration within48% to 50%, which equates to a freezepoint between -30°F (-34°C) and -34°F(-37°C). Coolant concentration should bechecked using a refractometer. We do notrecommend the use of hydrometers orcoolant test strips for measuring coolantconcentration.
Adding Coolant
WARNING: Do not put coolant inthe windshield washer reservoir. Ifsprayed on the windshield, coolant couldmake it difficult to see through thewindshield.
WARNING: Do not add coolantfurther than the MAX mark.
WARNING: Do not add coolantwhen the vehicle is on or the coolingsystem is hot. Failure to follow thisinstruction could result in personal injury.
WARNING: Do not remove thecoolant reservoir cap when the engine ison or the cooling system is hot. Wait 10minutes for the cooling system to cooldown. Cover the coolant reservoir capwith a thick cloth to prevent thepossibility of scalding and slowly removethe cap. Failure to follow this instructioncould result in personal injury.
Note: Automotive fluids are notinterchangeable. Do not use coolant orwindshield washer fluid outside of itsspecified function and vehicle location.
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Note: Do not use stop leak pellets, coolingsystem sealants, or non-specified additivesas they can cause damage to the enginecooling or heating systems. Resultingcomponent damage may not be covered bythe vehicle warranty.
It is very important to use predilutedcoolant approved to the correctspecification to avoid plugging the smallpassageways in the engine cooling system.See Cooling System Capacity andSpecification (page 301). Do not mixdifferent colors or types of coolant in yourvehicle. Mixing of engine coolants or usingan incorrect coolant may harm the engineor cooling system components and maynot be covered by the vehicle warranty.
Note: Coolants marketed for all makes andmodels may not be approved to Fordspecifications and may cause damage tothe cooling system. Resulting componentdamage may not be covered by the vehicleWarranty.
If the coolant level is at or below theminimum mark, add prediluted coolantimmediately.
For vehicles with overflow coolant systemswith a non-pressurized cap on the coolantrecovery system, add coolant to thecoolant recovery reservoir when the engineis cool. Add prediluted coolant to themaximum level. For all vehicles which havea coolant degas system with a pressurizedcap, or if it is necessary to remove thecoolant pressure relief cap on the radiator,follow these steps to add engine coolant:
1.Turn the engine off and let it cool.
2.Unscrew the cap slowly. Any pressureescapes as you unscrew the cap.
3.Fill the coolant reservoir slowly withprediluted engine coolant to within theminimum and maximum range on theengine coolant reservoir. If youremoved the radiator cap in anoverflow system, fill the radiator until
the coolant is visible and the radiatoris almost full. If coolant is added tobring the level within the minimum andmaximum range when the engine is notcold, the system may remain underfilled.
4.Replace the coolant reservoir cap, turnit clockwise until you feel a strongresistance.
5.Check the coolant level in the coolantreservoir the next few times you driveyour vehicle. If necessary, add enoughprediluted engine coolant to bring thecoolant level to the proper level.
Note:If prediluted coolant is not available,use the approved antifreeze concentratediluting it to 50/50 with distilled water. SeeCooling System Capacity andSpecification (page 301). Using water thathas not been deionized may contribute todeposit formation, corrosion or plugging ofthe small cooling system passageways.
If you have to add more than 1.1 qt (1 L) ofengine coolant per month, have yourvehicle checked as soon as possible.Operating an engine with a low level ofcoolant can result in engine overheatingand possible engine damage.
Note:During normal vehicle operation, thecoolant may change color from orange topink or light red. As long as the coolant isclear and uncontaminated, this color changedoes not indicate the coolant has degradednor does it require the coolant to be drained,the system to be flushed, or the coolant tobe replaced.
In case of emergency, you can add a largeamount of water without predilutedcoolant to reach a vehicle service location.On arrival do the following:
1.Drain the cooling system.
2.Chemically clean the cooling system.We recommend Motorcraft PremiumCooling System Flush.
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingMaintenance

3.Refill with prediluted coolant as soonas possible.
Water alone, without prediluted coolant,can cause engine damage from corrosion,overheating or freezing.
Do not use the following as a coolantsubstitute:
•Alcohol.
•Methanol.
•Brine.
•Any coolant mixed with alcohol ormethanol antifreeze.
Alcohol and other liquids can cause enginedamage from overheating or freezing.
Do not add extra inhibitors or non-specifiedadditives to the coolant. These can beharmful and compromise the corrosionprotection of the coolant.
Engine and Secondary CoolingSystem Refill Procedure
Use the following procedure when refillingthe engine or secondary cooling systemsafter it has been drained or becomeextremely low:
1.Before you remove the cap, turn theengine off and let it cool.
2.When the engine is cool, wrap a thickcloth around the cap. Slowly turn thecap counterclockwise until pressurebegins to release.
3.Step back when the pressure releases.
4.When you are sure that all the pressurehas been released, use the cloth to turnthe cap counterclockwise and thenremove it.
5.Slowly add prediluted engine coolantto the coolant reservoir until thecoolant level is within the minimumand maximum range as listed on thereservoir.
6.Reinstall the pressure relief cap.
7.Start and run the engine at 2000 rpmfor 2 minutes.
8.Switch the engine off and remove thepressure relief cap as previouslyoutlined.
9.If required, add prediluted enginecoolant to the coolant reservoir untilthe coolant level is within the minimumand maximum range as listed on thereservoir.
10.Engine cooling system: Repeat steps5 through 9 until the coolant level hasstabilized (is no longer dropping aftereach step) and the upper radiatorhose at the radiator is warm to thetouch (indicating that the enginethermostat is open and coolant isflowing through the radiator).
11.Check the secondary cooling system.Repeat steps 1 through 10 until thecoolant level has stabilized (is nolonger dropping after each step) andthe lower passenger side of thesecondary radiator is warm to thetouch (indicating secondarythermostat is open and coolant isflowing through the entire system).
12.Check the coolant level in bothsystems before you drive your vehiclethe next few times.
13.If necessary, add prediluted enginecoolant to the coolant reservoirs untilthe coolant level is within theminimum and maximum range aslisted on the reservoir. After anycoolant has been added, check thecoolant concentration.
Recycled Coolant
We do not recommend the use of recycledcoolant as an approved recycling processis not yet available.
Dispose of used engine coolant in anappropriate manner.
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Follow your community’s regulations andstandards for recycling and disposing ofautomotive fluids.
Severe Climates
If you drive in extremely cold climates:
•It may be necessary to increase thecoolant concentration above 50%.
•A coolant concentration of 60%provides improved freeze pointprotection.Coolant concentrationsabove 60% decrease the overheatprotection characteristics of thecoolant and may cause enginedamage.
If you drive in extremely hot climates:
•You can decrease the coolantconcentration to 40%.
•Coolant concentrations below 40%decrease the freeze and corrosionprotection characteristics of thecoolant and may cause enginedamage.
Vehicles driven year-round in non-extremeclimates should use prediluted enginecoolant for optimum cooling system andengine protection.
Coolant Change
At specific mileage intervals, as listed inthe scheduled maintenance information,the coolant should be changed. Theinstrument cluster display may display amessage to change coolant at this time.Add prediluted coolant approved to thecorrect specification. See Capacities andSpecifications (page 291).
Engine-driven Cooling Fan (FanClutch)
Your vehicle may have an engine drivencooling fan drive (also called a fan clutch).This fan drive changes the fan speed tomatch the vehicle’s changing cooling airflow requirements. Fan speed, fan noiselevel and fuel consumption all increasebased on the driving conditions thatinclude trailer towing, hill climbing, heavyloads, high speed and high ambienttemperature, individually or in combination.
The fan drive is designed to provide theminimum fan speed (and resultingminimum fan noise and fuel consumption)required to meet the ever changing vehiclecooling air flow requirements. You can hearfan noise increasing and decreasing as theengine power requirements and vehicledriving conditions change as you drive. Thisis to be expected as being normal to theoperation of your vehicle. High levels of fannoise might also be heard when yourengine is first started, and should normallydecrease after driving for a short time.
ENGINE COOLANT CHECK -
7.3L
WARNING: Do not remove thecoolant reservoir cap when the engine ison or the cooling system is hot. Wait 10minutes for the cooling system to cooldown. Cover the coolant reservoir capwith a thick cloth to prevent thepossibility of scalding and slowly removethe cap. Failure to follow this instructioncould result in personal injury.
WARNING: Do not put coolant inthe windshield washer reservoir. Ifsprayed on the windshield, coolant couldmake it difficult to see through thewindshield.
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2024 F-650/750 (TBC) , enUSA, Edition date: 202210, First-PrintingMaintenance