Jeep 1979 CJ-5 Technical & Service Manual page 785

3A-8 WATER LEAK/WIND NOISE DIAGNOSIS AND REPAIR
Ultrasonic Diagnosis anl Repair
(1) Make sure suspect areas are thoroughly dry. If
an opening or hole is full of water, ultrasonic sound will
be blocked.
(2) Close all windows, doors, and air vents.
(3) Using Listener Tool J-23455-01, perform ultra-
sonic test as follows: •
(a) Place transmitter in vehicle cargo com-
partment, turn switch on.
(b) Slowly pass listener around all edges and
sealers.
(c) Mark any area reading approximately 5 on
the meter as a indication of a possible leak.
(4) Clean suspect area as described above under
Bonding Surface Preparation.
(5) Examine rubber sealers for damage, distortion
or incorrect installation. Damaged or distorted rubber
sealers should be replaced as outlined in Chapter 3H.
(6) Correct improperly installed rubber sealers as
outlined in Chapter 3H.
(7) In instances of leakage from spot weld burn
holes, apply 3M All-Around Autobody Sealant, or equiv-
alent, and touch up with matching body color when dry.
(8) Repeat ultrasonic test to ensure t h a t an effec-
tive repair has been made.
Rear Floorpan, Wheelhouse Panels, Cross Sills, Quarter
Panels, Center Panels, and Eitenslons
Water can enter at the rear floorpan, wheelhouse pan-
els and quarter panel seams due to gaps, distorted pan-
els and/or lack of sealer. Leaks can occur between the
rear cross sill, center panel, rear floorpan or extension
panels due to excessive gaps and/or lack of sealer.
Water can enter around rear taillamp housings or side
marker lamps due to defective sealer/gasket or dam-
aged housings. Also, leaking floorpan plugs will allow
water to enter.
The light test, described above, may also be used for
finding water leaks in the cargo area.
Spray Diagnosis and Repair
(1) Remove spare tire.
(2) Remove cargo mat and/or carpet and sound in-
sulation material, if equipped.
(3) Remove rear trim panels in suspect area.
(4) Perform the following spray test using guide-
lines described under Spray Test above.
(a) Spray water from under vehicle at rear
floorpan, wheelhouse panels and quarter panel seams.
(b) Next spray water across rear floorpan, cross
sill, center panel and extension panel seams.
(c) Also, spray water across rear floorpan and
extension panel plugs.
(d) Move spray slowly upwards until water is
directed at each wheelhouse panel seam.
(e) Direct spray on lamp housings and coach
seams.
(f) Repeat spray test on other side of vehicle.
(5) If leaks are noted, dry out suspect area as de-
scribed above under Bonding Surface Preparation.
(6) Straighten any distorted panels.
(7) Seal small suspect joints or seams using 3M All-
Around Autobody Sealant, or equivalent.
(8) Seal large suspect joints or seams using 3M Un-
derseal Rubberized Undercoating, or equivalent.
(9) Examine suspect area for loose or missing body
plugs.
(a) Check for hardened sealer or road dirt pre-
venting plug from seating.
(b) Check plug hole to be sure that it is not
distorted.
(c) If necessary, reshape floorpan or extension
panels locally and add a bead of sealant around hole to
ensure a satisfactory water tight seal.
(10) Replace damaged or distorted lamp housing gas-
kets and/or seals. Also, tighten lamp housing attaching
hardware.
(11) Seal coach seams with sealant and touch up with
matching body color after sealant is dry.
(12) Tighten fuel tank filler neck screws and seal any
holes or breaks in gasket and/or sealer with above
sealant.
(13) Repeat spray test to ensure that an effective
repair has been made.
(14) Install previously removed rear trim panels.
(15) Install sound insulation material, if removed,
and cargo mat and/or carpet.
(16) Install spare tire.
Ultrasonic Diagnosis and Repair
(1) Make sure suspect areas are thoroughly dry. If
an opening or hole is full of water, ultrasonic sound will
be blocked.
(2) Remove spare tire.
(3) Remove cargo mat and/or carpet and sound in-
sulation material, if equipped.
(4) Remove rear trim panels in suspect area.
(5) Close all windows, doors and air vents.
(6) Using Listener Tool J-23455-01, perform ultra-
sonic test as follows:
(a) Place transmitter in cargo compartment,
near suspect area, and turn switch on.
(b) Slowly pass listener around all suspect
joints/seams.
(c) Mark any area reading approximately 5 on
the meter as a indication of a possible leak.
(7) Clean suspect area as described above under
Bonding Surface Preparation.
(8) Straighten any distorted panels.
(9) Seal small suspect joints or seams using 3M All-
Around Autobody Sealant, or equivalent.