Repair instructions
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          DA-RM-01A001-02-001 - Remove/Install Subframe - Front
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Instructions
Body Structures / Front Structures / Front Subframe / DA-RM-01A001-02-001 - Remove/Install Subframe - Front
Preparation work
1.     
2.     
3.     
Care Point: Remove both sides.
4.     
5.     
6.     
Care Point: Remove both sides.
7.     
8.     
Care Point: Remove both sides.
9.     
10.    
11.    
Care Point: Driver side only.
12.    
Care Point: Remove both sides. Disconnect only.
13.    
Care Point: Remove both sides.
WARNING!
 
Risk of poisoning and injury when handling brake fluid!
Swallowing brake fluid can cause symptoms of poisoning such as headaches, dizziness, stomach pains, vomiting, diarrhoea, cramps and unconsciousness.
A dose of more than 100 cm3 can have fatal consequences.
Contact with brake fluid can cause serious skin damage to unprotected skin.
Wear safety glasses and protective clothing such as rubber gloves.
•
Ensure that brake fluid is only accessible to authorized personnel.
•
Store brake fluid in original containers only.
•
Only store brake fluid in suitable, appropriately marked containers.
•
Never put brake fluid in beverage containers.
 
WARNING!
 
Risk of injury and poisoning working with hydraulic fluid!
Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure. When disengaging hydraulic lines without depressurising the system, dangerous skin or eye injuries can occur due to the very high pressures (in excess of 200 bar). If hydraulic fluid, particularly central hydraulic fluid (especially harmful), comes into contact with unprotected skin, this can cause damage to the skin.
If hydraulic fluid is swallowed, this can lead to poisoning symptoms such as headache, dizziness, nausea, vomiting, diarrhoea, cramps and unconsciousness.
Wear protective gloves, protective clothing and eye protection.
•
Depressurise and drain the system if necessary when commencing work on hydraulic systems.
•
Never put hydraulic fluid into beverage containers.
•
Ensure sufficient ventilation, especially in the case of central hydraulic fluid.
•
Ensure that only authorised persons have access to hydraulic fluid.
•
Immediately seal disconnected leads and hoses and the connections to the assembly with blind plugs.
 
WARNING!
 
Risk of injury and poisoning working with hydraulic fluid!
Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure. When disengaging hydraulic lines without depressurising the system, dangerous skin or eye injuries can occur due to the very high pressures (in excess of 200 bar). If hydraulic fluid, particularly central hydraulic fluid (especially harmful), comes into contact with unprotected skin, this can cause damage to the skin.
If hydraulic fluid is swallowed, this can lead to poisoning symptoms such as headache, dizziness, nausea, vomiting, diarrhoea, cramps and unconsciousness.
Wear protective gloves, protective clothing and eye protection.
•
Depressurise and drain the system if necessary when commencing work on hydraulic systems.
•
Never put hydraulic fluid into beverage containers.
•
Ensure sufficient ventilation, especially in the case of central hydraulic fluid.
•
Ensure that only authorised persons have access to hydraulic fluid.
•
Immediately seal disconnected leads and hoses and the connections to the assembly with blind plugs.
 
WARNING!
 
Risk of injury and poisoning working with hydraulic fluid under pressure!
Risk of injury to skin or eyes from hydraulic fluid spraying out under pressure. If any part of the hydraulic circuit has failed, a possibility of the system not depressurising can occur. Extra precaution is required in this event. If hydraulic fluid is swallowed, this can lead to poisoning symptoms such as headache, dizziness, nausea, vomiting, diarrhoea, cramps and unconsciousness.
Always wear skin protection cream, protective gloves and safety glasses when working on a potentially pressurised system.
 
Depressurise Suspension System
 
Care Point:
The suspension system must be depressurised before any work on the hydraulic system can begin.
 
1.  
Connect the McLaren Diagnostic System (MDS), proceed to Diagnostic Toolbox within Chassis Control Unit (CCU).
 
2.  
Go to Sequences in the Chassis Control Unit (CCU).
 
3.  
Do the APMU Maintenance Start sequence.
 
Remove Subframe - Front
1.   
Syphon the brake fluid.
 
2.   
Syphon the steering fluid.
 

3.   
Detach the ABS module brake lines (1). 18 Nm
Disconnect the electrical connectors (2).
 
4.   
Disconnect the electrical connector (3).
Remove the bolts (4) and detach the ground points. (M6x16) 8 Nm
Remove the bolts (5). (M8x12) 8 Nm
 
5.   
Remove the bolts (6) and detach the suspension lines.(M5x30) 5 Nm
Remove the bolts (7) and detach the steering lines. (M8x20) 25 Nm
Disconnect the electrical connector (8).
 
 
Care Point:
Vehicles fitted with nose lift option only.
 
6.   
Detach the nose lift lines (9).14 Nm
 
7.   
Remove the bolts (10) and detach the ground points. (M6x16) 8 Nm
Disconnect the electrical connector (11).
Remove the bolt (12). (M8x12) 8 Nm
 
 
Care Point:
Make sure that the gaiter is pushed upwards once released.
 
8.   
Release clamp (13) and detach the gaiter (14) from the steering rack.
 
9.   
Remove the clamp bolt (15) and detach the fluid lines (16) from the steering rack. (M8x20) 22.5 Nm
 
10.  
Remove the steering shaft bolt (17). (M8x35) 22 Nm
 
 
Care Point:
Always replace the Bolts (19 and 20). Refer to the Spare Parts Catalogue (SPC) for part numbers.
Care Point:
Refer to the installation procedure for the torque sequence.
Care Point:
Support the subframe with a jack stand.
 
11.  
Remove the bolts (18).
Remove the bolts (19) and discard.
Remove the bolts (20) and discard.
 
 
Care Point:
Make sure that the gaiter (14) does not clash when lowering subframe.
Care Point:
You must have the aid of one more person for the steps that follow.
 
12.  
Partially lower the subframe.
 
 
Care Point:
Check for clash conditions when lowering subframe.
 
13.  
Remove the subframe from the vehicle.
 
 
Care Point:
If replacing the subframe.
 
14.  
Remove and transfer the following components:
 
Install Subframe - Front
 
Care Point:
Make sure that the HVAC drain tube is correctly re-fitted.
 
1.   
Put the subframe in to the installation position.
 

2.   
Install the bolts (1) (M5x12) 4 Nm.
 
3.   
Loosely install the bolts with washers (1).
Loosely install the bolts (2).
 
4.   
Torque the bolts 1 thru 8 10 Nm.
 
5.   
Torque the bolts 1 thru 4 (M10x60) 65 Nm.
 
6.   
Stage 1: Torque the bolts 1 thru 4 (M10x85) 55 Nm.
Stage 2: Torque the bolts 1 thru 4 (M10x85) 70 Nm.
 
7.   
Install the remaining components in reverse order.
 
8.    
9.    
10.   
11.   
 
Care Point:
The procedure below must be claimed separately if you make a warranty claim.
 
12.  
Make sure that the suspension geometry is in tolerance.
 
   
   
   Note