Body/Frame - Cracking Noise From Firewall Area

CRACKING NOISE FROM FIREWALL/INSTRUMENT PANEL

Topic Number LI62.25-P-047124

Version 1

Design Group 62.25 Fire wall

Date 07-06-2009

Validity All model 221 (except right-hand drive)

Reason for change

Reason for block

Complaint:

Cracking noise from the area of the instrument panel/firewall when cornering, during throttle lift-off and on uneven roads.





Attachments

Cause:

Stress at the spot welds on the firewall to the right of the brake booster can result in cracking noises. (See figure 1 in attachment)

Remedy:

1. Remove/install wiper arm AR82.30-P-6100SX

2. Remove water deflector over wiper system.

3. Unscrew bolt. (See Figure 2 in attachment)

4. Center punch the 6 resistance spot welds using a hammer and center punch. (See Figure 3 in attachment)

5. Prime center punched resistence spot welds and touch up in vehicle color.

6. Treat center punched and touched-up resistence spot welds with wax. (See Figure 4 in attachment)

7. Reassemble vehicle in the reverse order.

*Part number sufficient for 32 cars, Submit as Local Purchase - ACA00107, Qty 1, handling is included.





Attachments





Symptoms





Parts





Work units





WIS-References





Validity





Overview of damaged area





Bolted connection to be undone





Resistance spot welds to be treated and tools used.





Preservation area