Campaign - Header Seal
Section8
Group
84
No.
0015
Year
99
Month
06
C70
1998
Campaign No. 91A
Header seal
Background:
To prevent possible infiltration of rainwater to the interior of the vehicle, additional sealing steps are to be taken on both sides of the vehicle.
Materials:
Description Quantity Part no.
Butyl tape 1/3 (2x120 mm) 9152636
3M Auto bedding and glazing 1/2 Locally supplied
compound, P/N 051135-08509
Silicone Sealant 1/2 1161277
Seal insert 2 9474894
Header Seal
1
This picture is to show where the sill-molding clip is 10- located on the passenger's side of the vehicle.
Note!
These steps are to be performed on both sides of the vehicle.
2
Remove
Detach the sill molding at the A-post.
Tilt sill molding away from A-post to see the body flange and sill-molding clip.
Carefully pry sill molding away from remaining sill molding clips and set aside.
(Sill molding to be reinstalled after Insulation mat check and/or replacement is complete per Campaign 91C Service Bulletin 89-0008)
3
Loosen
Carefully loosen the corner section of the primary weather seal from the body flange at the doorsill.
4
Remove and seal clip
Remove the clip and apply a small piece of butyl tape to body flange or in the clip retainer to seal off between the clip and the body flange.
Reinstall the clip and apply another bead of the butyl over the clip. Spread as shown to seal any gap in the body flange.
Re-seat the primary seal on the sill portion of the body flange.
5
Loosen primary weather seal
Carefully loosen the primary weather seal from the body flange at the A-post.
Warning!
Be careful that the header seal does not come loose from the body. The header seal is joined to the primary seal by a seal insert.
6
Separate primary weather seal from header seal
Fold up the collar of the header seal (1).
(Note location of header seal drain hole (2).)
7
Remove insert from both seals
Warning!
Be careful that the header seal (1) does not come loose from the body.
Pull primary seal (2) down and away from header seal (1) to separate the two seals and expose the seal insert.
Note!
The seal insert will pull out of one seal and remain in the other.
Carefully remove the seal insert (3) from the remaining seal.
8
Make a primary seal channel plug
Make a plug out of butyl tape and insert it into the top of the lower seal channel. This way, when the channel is reattached to the body flange, it will form an added barrier to water.
9
Apply butyl tape
The following will ensure a watertight seal in the A-post area at and directly below the header/primary seal joint.
Explanation to insert illustration:
pos 1 = seal guide
pos 2 = A-post depression
pos 3 = sheet metal overlap joint.
Note!
Too much butyl tape will cause the weather strip to deform / swell and not seal properly.
Start placing butyl tape from the body flange and so that it covers the sheet metal overlap (3) and the depression (2) in the A-post.
Spread out the butyl tape so that the depression (2) gets leveled smooth with the shape of the A-post.
Make sure butyl tape is not visible on the A-post when seals are reinstalled.
10
Clean and apply sealing compound
Note!
The following will help ensure a tight joint between the header and primary seals, and free flow of water out of the header seal.
Locate header seal drain hole (2). Ensure drain hole is clear of obstructions.
If the old seal insert does not have a flange to prevent it from sliding too far into the seals, discard it and use a new, flanged insert (1).
Clean the seal insert and all mating surfaces inside the upper and lower seals.
Apply a thin layer of butyl tape around the flange of the insert.
Apply a thin layer of auto bedding and glazing compound to the seal insert and around the openings of the upper and lower seals.
11
Warning!
Do not apply too much butyl tape around the insert or a bulge will be seen when the seals are joined. The seal diameter must not increase.
All water should drain out through the hole in the header seal.
12
Assemble
Join the upper and lower seal sections.
Ensure that the header seal collar (1) is not folded under.
Collar must extend down to completely cover the joint.
Thoroughly wipe clean any excess sealant from the joined seals. Otherwise, door weather-stripping will adhere when door is closed.
13
Repeat
Perform the preceding steps on the driver's side.
Reinstall the sill molding pieces only after Insulation mat check and/or replacement is complete per Campaign 91C Service Bulletin 89-0008.
14
Header Seal Reinforcement
Background:
The header seal is held on by doublesided tape everywhere except at the A-post top corners. There, the tension fit may allow water to enter between seal and body.
Goal:
To bond the non-taped areas of the seal to the body with glue.
15
Inject
Illustration shows RH A-post. Pos (1) is the A-post and pos (2) is the top latch).
Along top of seal:
Inject silicone between leading edge of seal and the body. Work from the top of the A-post to a distance (A) of 25 mm (1 inch) from the A-post.
Hint:
Push gently on the glued seal. If a small amount of silicone squeezes out, enough silicone has been used.
Down A-post seal
Inject silicone between seal and body as shown (1).
Insert nozzle between the seal and the A-post corner. Squeeze tube and move it gently along the seal for approximately 100 mm (4 inches).
Note!
Do not squeeze out too much silicone.
16
Wipe off
Wipe off any unnecessary silicone from weather strip or paint on A-post (1).
17
Repeat
Perform header seal reinforcement on both A-posts.