X
    Categories: Coolant preheater

Coolant preheater BMW 7 Series E32 / M70

EBA – 01 29 9 782 123
BMW Installation Instructions

(these installation instructions should be handed to the customer)

Function:

The coolant preheater raises the coolant circuit to its operating temperature without imposing any load on the car’s electrical system. It has an input rating of 750 Watts and consumes a current of 3.3 Amps at a temperature of 20 °C.

Important:

The unit must be connected up to a 220 V AC supply. For this reason, never carry out work on it while still connected up. Only switch on the heating element when there is enough coolant in the system, otherwise the unit will sustain severe damage.

Note:

As a safety precaution, check all threaded connections before switching on the coolant preheater.

Tools and materials required:

1/4 inch ratchet
1/4 inch extension
1/4 inch pivot joint
1/4 inch socket wrench inserts, 8 mm and 10 mm across flats
1/2 inch ratchet
1/2 inch extension
1/2 inch socket wrench inserts, 10 mm, 13 mm, 17 mm and 22 mm across flats
Double open-ended spanners, 10-11 mm, 12-13 mm, 20-22 mm and 27-32 mm across flats
Screwdrivers, Nos. 2 and 10
Side cutters
Allen keys, 5 mm and 10 mm
Twist drill bits, 6.5 mm and 7.0 mm diameter
Ring spanners, 13 mm and 17 mm across flats
Torque wrench
Power drill
Tape measure
Serial number   Illustration    Designation

1                       F 32 81 097   Special tool 11 50 30

Contents

Section

  1. Disconnecting battery terminals
  2. Removing air filter casings at left and right
  3. Removing radiator
  4. Removing water pump
  5. Removing air collectors at right and left
  6. Installing block heater
  7. Installing cables for block heater
  8. Installing plug connector
  9. Bleeding the cooling system
  10. Functional check
  11. Safety precautions

1. Disconnecting battery terminals

F 32 65 245

The battery terminals can be disconnected after removing cover (1) at the bottom right of the rear seat base.

Note:

Using a 4 mm Allen key, turn retaining clip (2) through 90° in the direction shown by the arrow.

F 32 65 246

Note:

When the battery terminals are disconnected, the fault memory is erased.

Make a printout of the fault memory first if necessary. Disconnect the negative cable (arrow) from the earthing point.

2. Removing air filter casings at left and right

F 32 61 081

Release the hose clip (arrow).

Detach hoses (1) and (2) from the air filter casing.

Turn plug (3) to release it, then detach it from the air filter casing.

F 32 61 082

Unfasten the retaining nut (arrow).

Lift air filter casing (1) out of its mounting.

3. Removing radiator

F 32 81 039

After the engine has cooled down, carefully open cap (2) of the level equalising reservoir (cooling system is pressurised).

Unscrew the nuts (arrows) at the right and left of the level equalising reservoir (1).

Note:

It is not necessary to remove the coolant hoses.

If necessary the level equalising reservoir can be swung to the side, making it easier for certain engine components to be installed or removed.

F 32 64 155

Release hose clip (1) on the lower coolant hose and pull it off. Discharge the coolant into a suitable container.

F 32 81 058

Detach plug (1) from the temperature sensor.

F 32 81 059

Release hose clips (1), and detach upper coolant hose (2) and overflow hose (3) from the radiator. Unscrew the hydraulic lines (4) for the automatic transmission.

When installing:

Renew the seals (0-rings) for the hydraulic lines. Fill the transmission with new automatic transmission fluid (ATF) and check the level.

F 32 81 060

Take out screw (1) and lift off cover (2).

When installing:

Before replacing the cover in position, fill the oil filter body with engine oil.

Check the oil level.

F 32 81 061

Lift out the oil filter.

The engine oil will flow back through the supply line to the sump.

Detach the feed and return lines (2), and seal both ends to prevent dirt from entering.

When installing:

Renew the seals (0-rings) for the feed and return lines.

F 32 81 062

Remove pins (1) from spreader clips (2). Lift out fan shroud (3).

When installing:

First insert the spreader clip, then the spreader pin.

F 32 81 063

Lever out retaining clips (1) at the left and right with a screwdriver.

Lift out the radiator.

When installing:

When removing or installing the radiator, make sure that the cooling fins do not sustain any damage.

4. Removing water pump

F 32 81 064

Prevent the belt pulley from turning using tool No. 11 50 30, and unscrew the collar nut.

Note:

Since the thread is left-handed, the nut is unscrewed by turning it to the right.

The correct tightening torque is 40 Nm.

F 32 81 065

Slacken screw (1) and nut (2) on tensioning device (3). Take off the drive belt for the alternator and vane-type pump.

Detach retaining screw (4) from the tensioning pulley and remove the tensioning pulley.

When Installing:

Slowly turn tensioning device (3) until it reaches its stop, then tighten screw (1) and nut (2).

The correct tightening torque is 24 Nm.

F 32 81 066

Slacken nut (1) on tensioning device (2), and remove the drive belt for the water pump and air conditioning com­ pressor.

Remove retaining screw (3) from tensioning pulley and take off the pulley.

When installing:

Slowly turn tensioning device (2) until it reaches its stop, then tighten nut (1).

The correct tightening torque is 24 Nm.

F 32 81 067

When installing:

Place the drive belt over the drive pulleys as shown in the drawing.

The tensioning device will automatically tauten the drive belt.

F 32 81 068

Slacken off screw (1) and remove the belt pulley from the water pump.

F 32 81 069

Take out screws (1). Remove the belt pulley from the crankshaft.

When Installing:

The belt pulley is centred on the crankshaft using a locating pin.

F 32 81 070

Remove screws (1) from the water pump.

When installing:

The correct tightening torque is 10 Nm.

F 32 81 071

Insert the three M 5 x 40 screws (1) (without shank) into the threaded holes provided, and force the water pump off the engine by tightening them uniformly.

F 32 81 072

When installing:

Renew 0-rings (1), and coat with HWB slip agent. Ensure that the 0-rings do not sustain any damage while being in­ stalled.

5. Removing air collectors at right and left

F 32 81 037

Remove rubber plug (1) from the engine cover. Turn flat slot­ ted screw (2) through 90° (bayonet fixing).

Note:

Removal of the air collector is shown for the right-hand side of the engine. Carry out the same procedure on the left-hand side in a mirror-image fashion.

F 32 81 038

Lift off engine cover (1).

F 32 81 040

Unscrew nut (1), and lift out bracket (2) for the engine cover. Disconnect the vacuum hose at the positions marked (arrow).

When installing:

The vacuum hoses are detached from the air collector and fuel pressure regulator as a safety precaution to prevent them from being accidentally confused.

F 32 81 041

The plug connectors for the injectors can be removed by pressing safety catch (1) in the direction shown by the arrow, and detaching plug (2) from the injector.

When installing:

When attaching the plugs, make sure that the safety catch engages properly.

F 32 81 042

Detach the threaded connection (bayonet fitting) by turning lever (1). Disconnect plug (2) from the throttle stub pipe.

F 32 81 043

Press safety catches (1) in the direction shown by the arrow. Disconnect plugs (2) and mark them to prevent accidental confusion when fitting.

When Installing:

When attaching the plugs, make sure that the safety catches engage properly.

F 32 81 044

Take out screws (1).

Remove electrical connection (2) from beneath chaincase (3) to the rear.

F 32 81 045

Lift cable duct (1) for the injector line out of the fuel distribu­ tion pipe (2).

F 32 81 046

Set down cable duct (1) for the injector line temporarily on the right of the engine compartment.

F 32 81 047

Detach hose clips (1).

Remove the hose from fuel distribution pipe (2).

F 32 81 048

Detach hose clips (1), and remove hose (2) from the fuel distribution pipe.

F 32 81 049

Remove Allen screws (1).

F 32 81 050

Remove fuel distribution pipe (1) together with the injectors from the engine.

Note:

Seal the holes in the air collector to prevent dirt from penetrating.

When installing:

Check the 0-rings on the injection valves for damage; renew them if necessary.

F 32 81 051

Release hose clip (1).

Detach breather hose (2) (crankcase) from the air collector.

F 32 81 052

Disconnect plug (1) from the cold start valve.

F 32 81 053

Unscrew nut (1).

Remove cable duct (2) for the ignition downwards and set aside.

F 32 81 054

Remove retaining screws (1).

Set down noise insulating strip (2) on the rocker cover.

F 32 81 055

Unscrew the nuts on the right-hand air collector flange. Lift out the air collector.

Note:

Seal the air intake ports in the cylinder head to prevent dirt from penetrating.

When installing:

The correct tightening torque is 9.9 Nm.

F 32 81 056

Unscrew nuts (1) on the left air collector flange (2). Lift out the air collector.

Note:

Seal the air intake ports in the cylinder head to prevent dirt from penetrating.

When installing:

The correct tightening torque is 9.9 Nm.

F 32 81 057

Unscrew nuts (1) and remove seal (2).

When installing:

The correct tightening torque is 24 Nm.

6. Installing block heater

F 32 81 073

Release hose clip (1).

Detach water hose (2) from pipe (3).

Take out screw (4), and lift out the pipe.

F 32 81 074

Raise pipe (1) and remove it from the engine. When installing:

Use new 0-rings, and coat them with slip agent.

Make sure that the 0-rings do not sustain any damage while being installed.

F 32 81 075

Take out screws (1).

Remove cover (2) and its seal from the crankcase. Note:

Clean the sealing face on the crankcase in order to prevent dirt particles from contaminating the cooling system.

F 32 81 076

Attach 0-ring (1) to block heater (2).

When installing:

Coat the 0-ring with slip agent.

Make sure that it does not sustain any damage while being fitted.

F 32 81 077

Insert block heater (1) into cover (2) and screw it down with nut (3).

When Installing:

The correct tightening torque is 9.9 Nm.

F 32 81 078

When installing:

Run the cable for the block heater underneath chaincase (3). Insert seal (1), attach the cover with block heater (2) to crankcase (2), and screw it down.

The correct tightening torque is 9.9 Nm.

7. Installing cables for block heater

F 32 81 080

Remove screws (1) from the chaincase. Install the bracket as shown in the drawing.

When installing:

The correct tightening torque is 9.9 Nm.

F 32 81 082

Remove screw (1) from air conditioning compressor (2).

Install the bracket as shown in the drawing.

When installing:

The correct tightening torque is 24 Nm.

F 32 81 083

Insert block heater line (1) into the retainers on the chain casing and air conditioning compressor, as shown in the drawing.

F 32 81 085

Take out screw (1), attach the retainers for the block heater line to the engine side member and screw them down.

F 32 81 086

Insert block heater line (1) into the retainer on the engine’s side member.

8. Installing plug connector

F 32 64 208

Remove grille (1) from the bumper.

Note:

Grille (1) is held in position by three spreader clips.

When installing:

First insert the clip, then the spreader pin.

F 32 81 087

Drill a hole through the punch-marked positions (1) at the right of radiator grille (2) using a 5.5 mm diameter twist drill.

Note:

If there are no markings, drill through the grille as shown in the drawing. If necessary, line up the holes with the plug mount.

A = 20 mm B = 40 mm C = 58 mm

F 32 81 088

Pass block heater line (1) between the second and third bars of the grille.

Insert connector (2) into bumper grille (3), and locate it in position using bracket (4) and screw (5). Attach clip (6) to the bumper grille.

F 32 81 089

Pass block heater line (1) through clip (2), and close the clip.

When Installing:

Insert the grille into the bumper.

F 32 81 090

Attach nut (1) to bumper bracket (2) and secure earth con­ nection in position with screw (3).

Attach retainer (4) to bumper bracket (2). Clip the block heater line into the retainer.

Note:

In order to portray this better, the bumper is illustrated as if detached.

F 32 81 091

On cars built to US specification: Insert nut (1) into bumper bracket (2).

Secure the earth connection in position using screw (3). Attach retainer (4) to bumper bracket (2).

Insert the block heater line into the retainer.

Note:

In order to portray this better, the bumper is illustrated as if detached.

When Installing:

Run the cable for the block heater into the engine com­ partment.

F 32 81 092

Fasten bracket (1) to the engine’s side member (earthing point).

Attach earth connection (2) and screw it down.

F 32 81 093

Connect block heater lines (1) and (2) together and attach them to the pressure line of the air conditioning system, us­ ing plastic clips (3).

For safety reasons, make sure that the plug and socket con­ nection is properly engaged.

Attach cable straps immediately in front of and behind the coupling to prevent it from separating .

When Installing:

Install the water pump, air collector and air filter casing in approximately the reverse order to which they were removed.

9. Bleeding the cooling system

F 32 81 094

Fill the radiator up to the marked level. If necessary, add antifreeze.

When Installing:

After installing the water pump and radiator, bleed the cool­ ing system.

F 32 81 095

Run the engine at increased idle speed. Set the heater valve to “warm”. Once operating temperature has been attained, remove bleed screw (1), and allow the coolant to escape un­ til it is free of air bubbles.

At the same time, keep the supply of coolant in the level equalising reservoir topped up.

Check the system for leaks according to BMW guidelines .

10. Functional check

F 32 81 096

Measure the electrical resistance between the plug and the heating element. At 20° C, it should be between 60 and 70 Ω.

The insulation resistance between the plug and the earth connection must be greater than 1 M Ω.

11 Safety precautions

  • Do not carry out any repairs. If parts prove defective (con­ necting cables, plugs or block heater elements), they must be renewed completely.
  • Before operating the coolant preheater, check the level of coolant.
  • Before and after using the preheater, never disconnect the cable at the car, but at the plug from the power supply cable.
  • For safety reasons, we recommend the use of circuit breakers.
  • After even a minor head-on collision, check that the system is still operating safely (i. e. that none of the electric supply lines has been damaged).

– As a safety precaution, we recommend that the system be checked each time before it is re-used when the cold season of the year commences.

eba :
Disqus Comments Loading...

This website uses cookies.