2010 JAGUAR XFR roof

For instance, the crumple zones absorb the bulk of the impact energy. If any unprofessional repair techniques or
methods are used in these areas then this can pose a fundamental threat to vehicle safety.
Hidden damage

As well as looking at external indicators like flaked off paint, it is vital to check for hidden body damage or deformation
that is not visible from the outside. Large attached parts like bumpers and inner fenders often need to be removed to
allow accurate assessment of damage to underlying body parts.
Gap dimensions

Gap dimensions offer another alternative for diagnosis by visual inspection. If any changes or misaligned edges are apparent,
then this usually indicates that the dimensions of the affected part are incorrect.
Changes in gap dimension



Item
Description 1
Gap too wide 2
Gap too small Impact effects on the body


NOTE: Vehicle components like drive shafts and trailer attachments transfer forces. If a vehicle is subjected to a rear
impact then all connected body parts and mechanical components (e.g. transmission mountings) should be thoroughly checked.
Electronic components should be checked to make sure that they still operate correctly.

Furthermore it is possible to deduce the overall extent of damage from the direction and magnitude of the impact forces. This
does however require extensive body-specific knowledge.

If, for instance, an impact occurs at the front left-hand side member, then the right-hand side member is usually also affected
as a result of the rigid body-shell design (crossmember). Often the length of this side member will not have changed, but
because of the rigid body-shell design it may have moved from its original position (often only by a very small amount). If any
deviations are present this can usually be detected by checking the gap dimensions between door and fender or by checking for
changes in dimension.

In the case of more severe impacts, the front part of the body cannot absorb all of the impact energy, and the passenger cell
is also deformed. Here the impact energy is transferred via the side member to the A-pillar (see diagram). This results in
deformations in the area of the roof and the door rocker panel.

The body reacts quite differently to side impacts where there is hardly any crumple zone. As the passenger cell is extremely
stable, there are comparatively few local deformations at the site of the impact. However, the impact forces are transferred to
the entire vehicle floor, which often results in so-called "banana damage", where the vehicle is bent into a banana shape.

Item
Description 1
Deformation area - roof rail 2
Deformation area - roof 3
Deformation area - door rocker panel Body measurements

Measuring options

Comparison measurements can also be made on the outside of the body. Depending on the damage, comparison
measurements and diagonal measurements can be carried out using compass, telescopic rod, tape measure or ruler.

NOTE: The same reference points must be chosen on both sides when checking for changed dimensions (e.g.
bores, edges, beads/swage lines etc).
All of the important external body dimensions are listed in Tolerance Checks.
For additional information, refer to: Body and Frame (501-26 Body Repairs - Vehicle Specific Information and Tolerance Checks, Description and Operation).
Measurements with a measuring/straightening jig.
A measuring/straightening jig is required for accurate measurements of the body. The measuring systems are
categorised by their means of operation:
Mechanical measuring system.
Optical measuring system.
Quick and accurate measuring results can be obtained using computerised measuring systems.

A minimum of three intact measuring points on the body are required for measurements of length, width and height
dimensions.

In some cases this may mean making the measuring points accessible. All of these measuring systems can be used to make
body measurements, provided all the equipment is available.

Planning a repair

The following decisions have to be made before the repairs are started:

Does the vehicle need to be put on a straightening jig, or can it be straightened by other means?
Does the body need to be measured?
Do aggregates like engine or axles need to be removed? Impact energy is transferred via the side member to the A-pillar

- Disadvantage: Scarring and hardening of the surface.
Flattening using a copper electrode.
- Small, sharp dents that face outwards can be worked on with a copper electrode.
Flattening using a flame and body files.

NOTE: When applied correctly, this method can be used with all the attached parts still in place (roof headlining,
wiring harnesses etc.).

- Small, soft dents (only slight stretching): Working at the edges of the dent in an inward spiral pattern, the dent
is heated with an oxyacetylene torch (torch size 1 - 2 mm, excess gas flame) to approx. 250° C.
- Working rapidly with a body file extracts heat from the edge area until the dent is flattened. Preferably alternate
between two files. This increases the amount of heat that can be extracted.

Safety measures

The electronic control modules (ECM) fitted to vehicles make it advisable to follow suitable precautions prior to carrying
out welding repair operations. Harsh conditions of heat and vibration may be generated during these operations which
could cause damage to the modules. In particular, it is essential to follow the appropriate precautions when
disconnecting or removing the airbag RCM.
Do not allow electronic modules or lines to come into contact with the ground connection or the welding electrode.
Seat belt anchorages are a safety critical. When making repairs in these areas, it is essential to follow design
specifications. Note that extra strength low alloy steel may be used for seat belt anchorages. Where possible, the
original production assembly should be used, complete with its seat belt anchorages, or the cut line should be so
arranged that the original seat belt anchorage is not disturbed.
All welds within 250mm (9.842) of seat belt anchorages must be carefully checked for weld quality, including spacing of
spot welds.
Remove the battery before carrying out welding work in its vicinity.
Utmost care must be taken when welding near the fuel tank or other components that contain fuel. If the tank filler
neck or a fuel line must be detached to allow access for welding work, then the fuel tank must be drained and removed.
Never weld, on components of a filled air conditioning system. The same applies if there is a risk of the air conditioning
system heating up.
Connect the ground connection of the electrical welder directly to the part that is to be welded. Make sure that there
are no electrically insulating parts between the ground connection and the welding point.
Adjacent vehicle parts and adjacent vehicles must be shielded against flying sparks and heat.

Pedestrian protection system

The pedestrian protection system is designed to mitigate injuries in a pedestrian collision with the vehicle. It does this by
utilizing a pair of pyrotechnic actuators to lift the hood away from the engine, creating a cushioned impact between the
pedestrian and the vehicle. It is essential that any repair or replacement operations do not affect the safe working of the
system.
For additional information, refer to: Pedestrian Protection System (501-20C Pedestrian Protection System, Description and Operation).

Resistance spot welding

Where resistance spot welds have been used in production, they must be reproduced with new spot welds in replacement
where possible. All such reproduction spot welds should be spaced 25 to 30mm apart.
Setting up the equipment and co-ordinating the welding parameters.

Equipment:
- Follow the equipment manufacturer's instructions for the equipment settings.
- Select the correct electrode arms (as short as possible).
- Align the electrode arms and tips exactly.
- Electrode tips should be convex (rough shaping with a file, fine shaping with a sanding block).
Body:
- Make sure that the flanges to be joined lie perfectly flat to one another.
- Prepare a bare metal joint surface (inside and outside).
Notes on technique/method:
- Carry out a test weld on a sample piece of the material coated in welding paste.
- If any metal parts are located between the electrode arms then there will be a loss of induction and therefore
power (adjust current setting).
- The power needs to be adjusted for high-strength low alloy steel.
- Repeated welding on old welding points often leads to poor quality welds.
- Keep the electrode tips as near as possible to an angle of 90° to the contact surface.
- Keep the pressure on the electrodes for a short period after finishing the weld.
- The electrodes work best if their shape is convex. Clean the contact surface of the electrodes regularly.
Resistance spot welding panels where the total thickness is 3 mm or more

For all repairs to modern Jaguar vehicles, spot-welding equipment should be suitable for reliable welding of zinc-plated,
high-strength and high-tensile steels in three or more layers, up to 5 mm total thickness. If these requirements are not
fulfilled, plug welding must be used for safety reasons. The electrical specifications (current, resistance, heat) of the
spot-welding equipment have different validity, depending upon the type of equipment. Therefore, it is essential that the
manufacturer's instructions are observed with regard to the actual welding performance.
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1
Water drainage, front 2
Water drainage, side and rear 3
Roof drainage 4
Engine compartment drainage Water leaks, diagnosis and corrective action: Front passenger compartment

Windscreen

Diagnosis:
- Ingress of water into A-pillar area or instrument cluster area and rocker panel area.
Cause:
- Breaks in adhesive beads
Corrective action:
- The breaks in adhesive beads can be located from inside by using compressed air. The leak can be identified
from outside by the escaping air.
- The second test method is by means of a water test. The outer trims must be raised carefully using a plastic
wedge. The leak should be located from inside by a second assistant. Water drainage system (illustration for reference only)
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Side windows

In the case of side windows, the same problems can arise as for a windscreen. The same corrective actions must therefore be
used.
Door seal

Diagnosis:
- Water ingress in the lower part of the interior door trim or in the rocker panel area.
Cause:
- The water shield fitted behind the interior door trim exists to drain off water that has entered the door via the
drainage holes, either downwards or outwards. If the water shield seal is damaged or has been fitted incorrectly,
then water can get into the passenger compartment.
- In addition to this, the drainage holes can become clogged with leaves, dirt or excess cavity protection agents.
Water gathers in the door and ingresses into the passenger compartment.
- Check water shield for damage or correct fitting.
- If the water shield needs to be re-bonded, then approved seam sealer should be used.
- Before the water shield is installed, the drainage holes must be checked for unhindered flow.
Door seals

Diagnosis:
- Ingress of water into the rocker panel area
Cause:
- Insufficient clamping load between seal and door.
Corrective action:

NOTE: When adjusting the clamping load, the profile alignment of the relevant components must always be taken
into consideration.


NOTE: Do not realign the flange too far in the direction of the door, as this can reduce the bearing surface of the
seal to the door.
- Check clamping load:
- The easiest way to check the clamping load of a seal to the respective bearing surface is by means of a paper
strip test. This consists of trapping strips of paper at various points between the door and the seal, and fully
closing the door. If it is possible to pull out the paper with no great resistance, then the clamping load is too
low.
- Adjust the clamping load:
- The clamping load is normally adjusted using the striker. When doing so, the edge alignment from the door to
the side panel, or from the front door to the rear door must be taken into account.
- Another setting method is to realign the panel flange for the seal mounting. The clamping load is increased by
moving the flange towards the door.
- Check the bearing surface:
- Apply chalk evenly to the surface of the seal. Evenly coat the bearing surface of the door with Vaseline.
- Close the door fully, the lock must engage. Open the door. The imprint of the chalk (bearing surface) can be
identified in the film of Vaseline.
- The bearing surface should be at least 5mm across at all points.

Other causes:
- The door seal must completely seal the door where it meets the bodywork.
- Water can ingress directly or indirectly into the interior of the vehicle if the seal is damaged at any point.
Corrective action:
- A damaged or worn door seal must always be renewed in full.
- When renewing the seal, the following must be taken into account:
- Always fit the seal first in the area of the narrow radii (corner points).
- Next, secure the seal to the flange evenly by tapping lightly with a rubber hammer. The installed seal must not
be kinked at any point.

NOTE: The prescribed length of a seal must not be shortened.
Other cause:
- The door seal is attached to the welded flange all the way round. If this welded flange is uneven or damaged at
any point (usually in areas with small radii) then this point could be subject to leaks.
- A stretched seal carrier can also cause a leak.
- In both cases, water gets into the vehicle interior under the seal carrier.
Corrective action:
- Align the deformed welded flange using a hammer and anvil block, prevent and, if necessary, repair any paint
damage.
Sliding roof/tilting roof

Diagnosis:
- Ingress of water at sliding roof aperture
Cause:
- The sliding roof/tilting roof is installed in a water trap. The water drains off via the water trap, water drain holes
and drain hoses. The drain hoses lead downwards on both sides via the A-pillar and B-pillar.
- The drain holes or drain hoses can become clogged with leaves, dirt, underbody protection and so on.
Corrective action:

NOTE: In the case of a sliding or tilting roof, the external rubber seal and the lock actuator or latch mechanism
must be checked first of all.
- Check the water trap for leaks.
- Check the drain hoses for leaks and for correct connection to the water trap.
- Check the drainage system for unhindered flow, and blow out with compressed air if necessary.
- Check the external seal and the correct adjustment of the sliding roof.

Liftgate

Diagnosis:
- Ingress of water into rear headlining area and luggage area.
Cause:
- The leak problems of the tailgate and liftgate correspond to those of the doors.
- In addition to this, the area to be sealed is much bigger. The routing holes for cables and hoses must also be
sealed.
- The rubber grommets for the routing holes must be checked for damage and correct seating (fully unhooked).
- The mounting points of the liftgate hinges may leak.
Corrective action:
- Check the rubber grommets and renew if necessary.
- Check the hinge mounting points, and re-seal with sealing compound if necessary.
Forced air extraction

Diagnosis:
- Ingress of water into side luggage compartment area
Cause:
- The forced air extraction for the vehicle interior is located in the quarter panel lower extension.
- The rubber flap of the forced air extraction must be able to move freely.
Corrective action:
- Remove the forced air extraction.
- Check the seal area between the bodywork and housing, as well as the rubber flap.
- Renew seal if necessary.

Rear window
Diagnosis:
- Ingress of water into the luggage compartment area
Cause:
- Rear window leaking.
- Check for leak in the same way as for leaking windscreen.

Section Description Gap Profile F-F Front bumper cover to front fender (inner sweep) N/A 0.5 ± 1.3
























































Section Description Gap Profile A-A Rocker panel finisher to front door 4.0 ± 1.5 N/A B-B Windshield to roof panel 4.0 ± 1.1 N/A C-C Front door to rear door 3.65 ± 1.0 -0.5 ± 1.0 www.JagDocs.com

D-D Front door to rear door at waist 3.65 ± 1.0 0.0 ± 1.0 E-E Front door to rear door upper 3.65 ± 1.0 0.0 ± 1.0 F-F Front door to roof 11.7 ± 1.6 N/A

Section Description Gap Profile A-A Rear door to quarter panel 3.65 ± 1.0 0.00 ± 1.0