Supplies Necessary

  • Phillips Screw Driver
  • 13mm Socket
  • Pliers
  • Side Cutters, operating theater Bull Nose Cutters, operating theater A Turning Cutter (Dremel)
  • 2x Screw-eccentric Hose Clamps (at least 1/2 inch)
  • 3/8 inch hose barb connector
  • Superior Radiator Hose (BMW Part 17127593490)
  • 1 Gallon Congregate BMW Compatible Coolant (BMW Break u 82141467704)
  • 1 Gallon Distilled Water
  • A Immaculate bucket (at least 2 Imperial gallon capacity) for mixing the new coolant
  • A clean funnel
  • Catch Pan (leastwise 2 gallon capacity)
  • 100% Mineral jelly

When To Replace The Upper berth Radiator Hose down?

The pep pill radiator hosiery on the N52 3.0 Engine is prone to failure at the decreased fittings.  The teensy hoses are ofttimes in the way when strange components on the front of the engine are serviced and can be masculine.  As the moldable components pass numerous heat cycles, they will weaken and likely start to escape in front an outright failure.  The small hose that goes from where the large radiator hose connects to the Y-connector is most belik to fail as it is stressed when trying to remove the radiator fan.  If this leaks, it will likely drip mould onto the snakelike belt.  This hose does not need to embody replaced unless information technology fails.

How To Do It

1. Absent Intake Snorkel

The plastic snorkel that routes bleak air from in front line of the radiator to the filter out boxwood on top of the railway locomotive must be removed.  This is held in place by cardinal plastic rivets close to the middle of the snorkel breather.  These rivets are simple to remove by greedy the eye PIN number with pliers and pulling astir.  For me, the whole rivet comes out with the thole.  Once the rivets are removed, you can intoxicate the forward end of the snorkel and pull it out of the air filter box.

2. Get rid of Front Upper Trunk Brace

The straw man brace for the consistence is held in place away 4 13mm bolts, two on all side.  Before removing the brace, you will take up to pop the plastic line of merchandise off of the dyad that runs the length of the brace.  This line is held in set down in 3 places along the engine side of the couplet.  The bolts are secured underneath two hard air conditioner lines on the leftover and under the radiator ventilation hose on the right.  Once the 4 bolts are removed, the brace can embody lifted ascending slightly on the right hand side.  Then slide the brace to the right until IT clears the hard air conditioner lines.  Later the brace clears the air conditioner lines, it can easy slip out from under the radiator hoses.

3. Remove Radiator Fan (Nonmandatory)

You do not need to remove the radiator fan, only it gives you a mickle more than room to work the radiator hose intelligent connectors.  There is a single electrical harness happening the left-hand side of the radiator fan that necessarily to equal garbled.  The rooter is held in situ aside 2 plastic pins, one on either side.  To release these pins, simply press in on the plastic retainer spring above the pin with one finger patc lifting high on the fan.BMW e70 Right Side Radiator Fan Retention Pin

The trap on the left face is fixed, but the tholepin on the right side can revolve around round once IT is free of the retainer.  The right pull pin needs to revolve 180 degrees around ready to clear the upper radiator hose fitting.  At one time the right hand personal identification number is flattened against the buff mainsheet, the rooter can be upraised high and out of the engine compartment.  The radiator ventilation hosiery is in the way, simply thither is enough flex in it to puzzle the fan out.

4. Take away Squelch Guard From Underneath The Engine

In order to collect the mobile that will drain out, you will involve to remove the plastic sprinkle guard from underneath the engine.  This is held in place by several Phillips brain screws that only postulate a draw and quarter turn to remove.  The 4 screws along the advance will actually fall impermissible of the holes, while the other screws will stay with the mudguard once discharged. With the splash sentry go out of the way, you can place your haul pan to collect the coolant.

5. Disconnect Small Pep pill Radiator Hose FittingBMW e70 Lower Small Connecter from Upper Radiator Hose

You can find this hose by following it from the large radiator-go with connection.  It is secured to the frame away a retainer curtail and should well take up of the retainer.  A metal clip holds the male and female connectors together.  This clip can slide half way down to an unsecured position.  In this position you can disconnect the hosiery, merely I find it easiest to remove the clip entirely.  With this cartridge holder removed, the only matter holding the connectors together is friction of an o-ring.  I have saved that the best agency to disconnection these is to go for one end in each hand and pull while writhing the male end.  Glucinium forbearing and unrelenting and the connector will come free.

6. Lashkar-e-Toiba The Coolant Enfeeble Out

Most of the fluid will drain out of the female end down in the mouth into your catch pan.  I poised about a gallon and a half out of this hose.  It may take a few minutes for the fluid to kibosh moving.  You will likely involve to keep apart the distaff end out from the frame to assist the fluid to drain without getting all over the frame.  Spilled coolant isn't a big fish as long as information technology doesn't pool anywhere.  Coolant evaporates pronto, just is poisonous so you don't want IT to pool anywhere animals could drink information technology.

7. Cut The Ear Clamps Connected The Y-ConnectorBMW e70 Upper Radiator Hose Ventilation Hose Y-Connector

There are 3 ear clamps connected the Y-connector that comes out of the coolant reservoir.  All deuce-ac of these clamps should be distant.  You can cut the top of the ear with side cutters, bull nose out cutters, or a dremel tool.  This May occupy a petite act upon as these are steel clamps.  Alternatively you can pry the end up with a flathead screwdriver.  Of course, subsequently you murder the clamps, they cannot atomic number 4 reused.  Don't worry if you dampen the Y-connecter like I did in the above image.    This connector will be replaced by a simple coupling as the recently part doesn't have the hose to the reservoir from the engine.

8. Remove Radiator Side ConnectorBMW e70 3.0 Upper Radiator Hose Connection Point

The BMW upper radiator hose can now be removed from the radiator.  This is done similarly to how the first connector was removed to let the coolant enfeeble.  Simply remove the retainer clip from the "flying" connect fitting and wriggle the pistillate end until it comes off.  You shouldn't own whatsoever fluid drain forbidden of this connection, since most of the fluid is already drained out.  You may see a angry line on the male end from the o-ring.  It is worth taking some time to complete this upfield.  This will help forbid the fitting from leaking.

9. Remove The Engine-Side ConnecterBMW e70 3.0 Upper Radiator Hose Engine-side connector

Third verse same A the other two.  Hit the retainer time from the "quick" connect fitting.  And so joggle and pull on the fitting until it comes release.  These fittings tend to joystick American Samoa the o-ring becomes bonded in place.  Cleaning the male end of the connection will help the New o-ring to seat well and non leak.  This is the hold up connection for the pep pill radiator hose assembly, so IT can live removed.

10. Prepare The New Radiator Hose Connectors

I have recovered that applying a small amount of petroleum jelly to these connections aids in attachment.  You don't need a good deal of jelly along these surfaces, a thin plastic film volition do.  I suggest applying a anorectic film to some the male and female connectors.  This is done in order to lube the o-rings and make sure the fittings seat well without very much of force.

11. Install The Spick-and-span Top Radiator Hose

I suggest connecting the small appointment first, paying care to how the hosepipe was routed ahead.  You will need to use the retainer clip that was abstracted earlier.  Connect the engine-side and radiator-position fittings.  You can push these connected with the retainer clip in grade.  With the retainer cartridge clip in situ, it should elasticity into its slot as you push the connective on.

12. Colligate The Radiator To The Artificial lake

Since the new part does non have a meet for the small hose, you will need to use the 3/8 edge in coupler to join the reservoir hose to the radiator respiration hose.  This volition deman the coupling and the 2 weeny hose clamps.  You rear end see how this is configured in the picture from step 7.  The tertiary connection from the engine-side fitting to the reservoir is non required.

13. Reinstall the Radiator Fan

Looking down at the bottom of the radiator, there are deuce eyelets for the pall to key into.  The correctly-side pin inevitably to stay folded in until it is passed the upper radiator hose.  Make a point that some pins are lined ascending before seating them.  If you snap the port-English pin in place low gear, you won't Be able to properly seat the right-English pin.  After the fan shroud is snapped into place, you can reconnect the fan's electrical harness.

14. Mix Coolant And Fill Reservoir

Now that all of the connections are made, you are fit to fill the cooling system with original coolant.  You Crataegus oxycantha be tempted to reprocess the old coolant, but I father't urge this after it has splashed over the frame and catch pan.  Mix the concentrated coolant and distilled water in the spick bucket and so use the clean funnel to pour IT into the source.  I find it useful to pour the mixed coolant back into one and only of the jugs for facilitate in filling the reservoir.  Go in the lead and take the reservoir to the level bes charge as it leave drop a little during the next footstep.

15. Burp The Cooling System Of Airwave

This tread has to be one of my favorite parts of having an electric water pump.  The electric water ticker bathroom be run without turning on the engine ready to circulate the coolant and drive flying bubbles out of the system.

Insert the key fob into the ignition
Insistency start button without brake pedal (preceptor't start the engine)
Turn Passenger and Driver climate controls all the way up
Bi the climate control fan all the way push down without turn it off
Press the accelerator to the level and curb IT for 10 seconds

You should discover the water pump cycle on aft holding the throttle down feather.  While the irrigate pump is running you can peer into the reservoir and see fluid pumping in from the ventilator hose.  The water heart will cycle off and on several multiplication during the haemorrhage unconscious process, which takes about 10 transactions to complete.  I like to leave the reservoir open during the bleeding cycle to rent out aerate.  Newer models may have a special bleeder valve to open on the reservoir.  If the hemophiliac valve is present, you should close the reservoir until the haemorrhage procedure completes.

16. Assembly Is The Reverse Of Dismantling

Waiting for the haemorrhage physical process to complete, about 10 minutes, is a good time to put everything plump for jointly.  This includes putting the body brace back, securing the hood release line of descent to the body brace, and replacing the intake snorkel.  Once you are content that there are no leaks, go ahead and substitute the splash sentry duty underneath the engine compartment.  Erst the bleeding procedure completes, check the coolant level in the reservoir and top it bump off if obligatory.