E781 2032308/1

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Field campaign
Topic

V8 engine coolant circulation - de-gas circuit - heater performance - one way valve
orientation over check (SC13/05)

Market area

Worldwide Bentley (1WBE)

Brand

Bentley

Transaction No. 2032308/1
Campaign
number

E781

Note
Type
US code

Vehicle data
Continental VB
Sales types
Type MY

Brand Designation Engine code Gearbox code Final drive code

3932* 2012 E

*

*

*

3932* 2013 E

*

*

*

3942* 2012 E

*

*

*

3942* 2013 E

*

*

*

Chassis numbers
Manufacturer Filler Type Filler MY Factory Fro m
SCB

***

**

*

SCB

***

**

*

To

Prod from Prod to

c c
D c

Documents
Document name
master.xml

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E78 1 2032308/I

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E781

Transaction No.: 2032308/1

V8 engine coolant circula tion - de-gas circuit - heater performance - one way
valve orientation over check (SC 13/05)

.,.. Repair instructions

Notes
Technical background

Two one way valves integrated into the hose assembly, 3W0.121 .632.C, that make up part of the engine
cooling de-gas circuit may have been incorrectly ori entated. Th is can reduce coolant flow in the heater
circuit reducing cabin heating performance. As a precautionary measure the orientation of these two
valves has to be checked

Remedy
On all applicable vehicles the orientation of both one way valves has to be established and if either is
found to be incorrect that specific hose replaced

Customer notification
Customers do not need to be informed directly of this campaign . Please ensure that all affected vehicles
are checked and repaired during a service visit. You should also inform your new and used car sales
departments so that the vehicles affected can be checked and , if necessary, repaired immediately (and not
just before sale)

Warranty accounting instructions
Time for check - no hose change
Warranty Type

910or710

Labour Operation Code

19 62 01 20

Damage Service Number

E781

Damage Code

00 66

Criteria ID

01

Time

30TU

Time for check - change hose A or B
Warranty Type

910or7 10

Labour Operation Code

19 62 55 20

Damage Service Number

E781

Damage Code

00 66

Criteria ID

01

Time

40TU

Plus Road Test

Labour Operation Code

19 62 55 99

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E781 2032308/1

Time

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50TU

Time for check - change hose A and B
Warranty Type

910 or 710

Labour Operation Code

19 62 56 20

Damage Service Number

E781

Damage Code

00 66

Criteria ID

01

Time

50TU

Plus Road Test
Labour Operation Code
Time

19 62 55 99
50TU

Genuine parts
The required replacement parts should be ordered from Bentley Motors Limited Crewe or through your
regional Bentley parts distribution centre

Parts supply
Part number

Description

3W0.121.632.C

Breather line hose assembly 1

Quantity

Parts despatch control

Repair instructions

Notes

Technical background
Two one way valves integrated into the hose assembly, 3W0.1 21 .632.C, that make up part of the engine
cooling de-gas circuit may have been incorrectly orientated. This can reduce coolant flow in the heater
circuit reducing cabin heating performance. As a precautionary measure the orientation of these two
valves has to be checked

Check
If the vehicle is not already listed as repaired in the "Repair history" (In Elsa pro), check for the campaign
identification mark, yellow paint mark located on the steel pipe (Figure 8), should neither be evident carry
out the required work in accordance with these instructions

Genuine parts
The required replacement parts should be ordered from Bentley Motors Limited Crewe or through your

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regional Bentley parts distribution centre

Work
I Warning: Before commencing work on and around the engine, ensure that it has cooled
sufficiently, failure to do so may cause injury to personnel.
1.

Slowly remove the expansion tank cap to equalise system pressure

Figure 1
2.

Referencing figure 1 locate coolant hose (A) containing the one way valve

Figure 2
3.

Disconnect coolant hose (A) from the steel pipe

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4.

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To check the orientation of the one way valve ensure the expansion tank cap is removed then apply
light air pressure to hose (A) . If the air flows freely In the direction of the green arrow, towards the
expansion tank, then the one way valve is correctly orientated in this hose. If the applied air pressure
is restricted and does not flow then the valve is not orientated correctly and a replacement hose must
be fitted

Figure 3
5.

Referencing figure 3 locate the coolant hose (8) containing the second one way valve

I

....
Figure 4
6.

Disconnect coolant hose (8) from the stub pipe (C) . Temporarily fit a blanking plug to the stub pipe
to minimise coolant loss

7.

To check the orientation of the one way valve ensure the expansion tank cap is removed then apply
light air pressure to hose (8) . If the air flows freely in the direction of the green arrow, evident as air
exhausts at the expansion tank, then the one way valve is correctly orientated in the hose. If the

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applied air pressure is restricted and does not flow then the valve is not orientated correctly and a
replacement hose must be fitted

A

3\N0.121.632.C
Figure 5
Note: To produce a replacement hose remove the required specific part, hose A or hose B, from a
new assembly 3W0.121 .632.C. The remaining section of this assembly can be discarded (see
Figure 5)

Figure 6
8.

Caution: Care must be taken in the event that hose B requ ires replacement. Nylon pipe E shown in
figure 6 will deform easily if force is applied therefore to remove hose B from this pipe a su itable hose
pick (D) should be used

9.

Check and if necessary correct the coolant level in the expansion tank

10. On completion apply a yellow paint campaign identification mark to the steel pipe (see Figure 8)

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11 . Prior to road test start the engine. Set climate control to AC off, maximum heat (Hi) and 1 segment
selected on the fan speed. Elevate engine rpm to 3000 hold at this rpm until normal running
temperature is achieved

Figure 7
12. Carry out 15 minute road test. During the test, the climate control should be set to maximum heat
(Hi) and 3 segments on the fan speed for both driver and front passenger. This will ensure the
engine cooling system, specifically the heater circuit, is de-gassed. On completion of the road test,
set both driver and front passenger air distribution controls to facia. At idle, confirm the output
temperature is balance and consistent between left and right facia vents (see Figure 7)
If temperature is not balanced or consistent, repeat road test and re-check
13. After the road test re-check and if necessary correct the coolant level in the expansion tank

Identification

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Figure 8
Yellow paint completion mark on steel pipe

Repair instructions

Notes

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