Roof Sealing And Wind Noise; 'A' Post/Header Sealing And Lock Adjustment - Aston Martin DB7 Workshop Manual

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Body and Trim
Roof Sealing and Wind Noise
Roof Sealing and Wind Noise
Roof seals and side windows have been provided
with a range ofadjustments capable ofdealing with
any leaks which may occur.
The following information is divided into five
sections:
1. A post and header sealing/roof lock adjustment
2. Roof seals - adjustment
3. Cheater plate seals - adjustment/renewal
4. Door glass - adjustment
5. Rear quarter glass - adjustment (9.1.01.2)
When a leak is reported, either wind noise or water
ingress, try to pinpoint the actual leak path using
any of the following methods:
• An ultrasonic leak detector
• An air flow detector, e.g. Drager smoke tube
• Paper test strips at seal contact areas
9.2.01.5 - 'A' Post/Header Sealing and
Lock Adjustment
when a leak is detected at the top of the 'A' post
adjacent to the header rail seal, first ensure that the
roof lock is correctly adjusted.
If the lock is difficult to operate, it is probably
overtensioned. Release the retaining hook locknut
and extend the hook one full turn. Checkand repeat
the adjustment as necessary.
If the locking handle is loose, it is undertensioned.
Release the retaining hook locknut and screw the
hook inwards one full turn. Check and repeat the
adjustment as necessary.
Open the roof and check for obvious seal defects
i.e. collapse, damage or manufacturing faults.
Replace where necessary.lf the lock tension is
correct and a leak is still evident, it may be caused
by lack of pressure between the front frame and
header seals (Fig 2).
Increase seal pressure by inserting a packer between
the front and rear frame seals (see DB7 Volante
parts manual).
Note: After fitting sea! packers, check the locking
handle tension and adjust if necessary. If a leak is
still evident, go to 9.2.01.6.
Figure 2. Front and Rear Seal Packers
Figure 1. Roof Lock
May 1996
7-17