1988 PONTIAC FIERO Service Repair Manual

5N-8 DOORS - F STYLE
3. Insert long, flat-bladed screwdriver under pivot
point of hold-open link and over top of spring.
Screwdriver should be positioned so as not to
apply pressure to hold-open link.
Cover spring with shop cloth and lift screwdriver
to disengage spring. Spring can also be removed
using tool J-28625 (or equivalent) door hinge
spring compressor tool (Fig. 15). The tool is
stamped right side and left side. The tool stamped
left side is used to service the right-hand hinge
spring. The tool stamped right side is used to
service the left-hand hinge spring.
a. Install two jaws of tool over spring. Jaw
with slot slides over spring at hold-open
link. Jaw with hole fits over spring at bubble
on door hinge pillar.
b. Install bolt to jaws of tool and tighten to
compress spring.
c. Remove tool and spring from door hinge
assembly. Do not remove spring from tool.
4. If replacement hinge pin barrel clips are not
available, save the clip as follows:
a. Using two small screwdrivers, spread clip
enough to move clip above recess toward
pointed end of pin.
b. As pin is removed, clip will ride shank of pin
and fall free.
c. Reinstall clip onto pin before installing
door.
5. With aid of helper to support door, remove lower
hinge pin using soft-headed hammer and locking
type pliers. Helper can aid hinge pin removal by
raising and lowering rear of door.
6. Insert bolt into hole of lower hinge to maintain
door attachment during upper hinge removal.
7. Using a 13 mm socket, remove upper hinge bolts
from pillar. Remove bolt from lower hinge and
remove door from body.
Fig. 15-Door Hinge Spring Compressor Tool
Door Installation
Before installing door, replace hinge pin clip or
reuse old clip as outlined in removal procedure.
1. With aid of helper, position door and insert bolt
in hole of lower hinge.
2. Upper hinge is bolted to body. Lower hinge pin
is installed with pointed end down.
3. Remove screw from lower hinge and install lower
hinge pin. The use of tool J-28625 or equivalent
(Fig. 15) is recommended for installing hinge
spring.
NOTICE: If spring is installed before installing
lower hinge pin, damage to hinge bushings may
result.
4. If spring was removed using screwdriver, install
spring as follows:
a. Place spring in tool J-28625 or equivalent
(Fig. 16).
b. Place tool and spring in bench vise (Fig. 17).
c. Compress tool in vise and install bolt until
spring is fully compressed (Fig. 18).
d. Remove tool (with compressed spring) from
vise and install in proper position in door
lower hinge. Slot in one jaw of tool fits over
hold-open link. Hole on other jaw fits over
bubble.
e. Remove bolt from tool to install spring (Fig.
16).
f. Remove tool from door hinge (tool will fall
out in three pieces). Cycle door to check
spring operation.
If tool J-28625 or equivalent was used to remove
spring, follow steps d, e and f above to install
spring.
5. Remove tape from door and body pillars.
6. On doors with power-operated components,
install all previously removed parts in reverse
order.
Fig, 16-Spring Installed to J-28625 (Noncompressed)
DOOR SIDE HINGE STRAP
Removal
1.
Remove door trim panel and inner panel water
deflector.
2. Remove door from body.
3. Center punch and scribe location of hinge strap
on door hinge pillar (Fig.
19).
4. Center punch visible weld marks on hinge base.
Drill a
3 mm (1/8") pilot hole completely
through welds at center punch marks. When
drilling out welds, drill only deep enough to
penetrate hinge base to release hinge from panel
as shown in Figure 20.

1. BOLT
2. DOOR HlNGE SPRING COMPRESSOR
TOOL
5-28625
3. SPRING
Fig. 18-Spring Fully Compressed in J-28625
5. Using 3 mm (1/8") hole as a guide, drill out welds
with a 13 mm
(1/2") drill bit.
6. A slight amount of weld may still retain hinge
base to panel. Drive a chisel between panel and
hinge base to separate hinge from panel.
1. LEFT DOOR 2. CENTER PUNCH UPPER AND LOWER
INBOARD CORNER OF HlNGE
3. SCRIBE LOCATION OF HlNGE ON DOOR
HlNGE PILLAR
Fig. 19-Locating Hinge on Door Hinge Pillar (Typical)
BOORS - F STYLE 6H.9
HlNGE PILLAR
HlNGE PILLAR
REINFORCEMENT HlNGE BASE
DRILL THROUGH
HlNGE BASE TO
REINFORCEMENT
DRILL
3mm (118 1 GUIDE HOLE
Fig. 20-Typical Weld
Installation
Figure 21 shows the service installation for the
door side hinge straps on a typical door hinge pillar.
Tapped anchor plates (available as
service parts) must be used to maintain
structural integrity of door hinge system. Do
not substitute with nuts and bolts.
1. Prepare
door hinge pillar facing as required for
replacement of hinge strap and anchor plate.
SECTION A-A
SECTION
8-B
1. UPPER DOOR HINGE STRAP
2. TAPPED ANCHOR PLATES
3. LOWER DOOR HlNGE STRAP
092524-5H.F
Fig. 2 1-Installing Door Side Hinge Straps (Typical)

5W-10 DOORS - F STYLE
2. Position the replacement bolt-on hinge within
scribe marks on the hinge pillar facing and center
punch bolt hole locations in hinge pillar.
3. Using a 13 mm
(1/2") drill bit, drill hinge
attaching holes. The 13 mm
(1/2") holes in the
door hinge pillar will provide for some in and out
door adjustment when reinstalling the door
assembly.
4. Coat surface of hinge strap that mates with hinge
pillar with medium bodied sealer. Install hinge
using specified service bolts and service anchor
plates. Tighten hinge bolts to 20 to 28
N.m (14
to 20 ft-lb) torque.
5. Install door to body.
Whenever hinge straps have been replaced and
the door reinstalled, the door should not be closed
completely until a visual check is made to
determine if lock fork bolt will correctly engage
with striker.
6. Install door water deflector and door trim panel.
BODY SIDE HINGE STRAP
Removal
1. Remove door assembly from body.
2. Center punch and scribe location of lower hinge
strap on body hinge pillar.
3. Scribe location of hinge strap on body pillar (Fig.
19).
4. Remove one of the following trim items
depending on which hinge strap is being repaired.
s Left-hand lower hinge - remove the
left-hand shroud trim panel.
Right-hand lower hinge
- remove
right-hand shroud trim panel.
5. Remove noise control adhesive patch to gain
access to bolt which was installed from the
inboard side of the car.
6. Using 15 mm socket, remove bolt installed from
inboard side of body.
7. From outside of car, use 13 mm socket and
remove remaining bolt.
8. Remove hinge strap from body.
Installation
Figure 22 shows the service installation for the
body side hinge straps on a typical front body hinge
pillar.
1. Prepare body hinge pillar facing as required for
replacement of hinge strap and anchor plate.
2. The service body side lower hinge straps have two
bolt holes. To locate the other bolt hole, use the
original hinge strap to make a paper template.
Outline the original hinge strap on a piece of
paper. Locate the centerline of the bolt hole
which is required. Push a pen or pencil through
paper template at this location. Place template on
service hinge and once hinge is aligned with
template, center punch new hinge using hole in
template as a locator.
3. Using a 8.5 mm
(11/32") drill bit, drill hole in
hinge strap. The holes in the body hinge pillar
SECTION A-A
SECTION
B-B
1. UPPER DOOR HINGE
2. LOWER BODY HINGE STRAP
Fig. 22-Installing Body Side Hinge Straps
will provide for some movement when
reinstalling the hinge strap.
4. Coat surface of hinge strap that mates with body
pillar with medium bodied sealer.
5. Hand start bolt from inside of body through
hinge strap.
6. Install bolt from outside of body through hinge.
Torque 20 to 28
N.m (15 to 20 ft-lb).
7. Tighten inside bolt 40 to 55 N-m (20 to 40 ft-lb).
8. Install door to body. Whenever hinge straps have
been replaced and the door reinstalled, the door
should not be closed completely until a visual
check is made to determine if lock fork bolt will
correctly engage with striker.
9. Replace all trim items.
DOOR WINDOW SYSTEM
This portion of the manual contains the service
operations necessary to remove the window glass and
all hardware pertaining to the window system. Any
work performed on window system hardware requires
removal of the door trim panel and inner panel water
deflector. These removal procedures are covered in the
Door Trim and Door Sealing sections.
Adjustments
In the following steps, the numbers in
parentheses refer to items in Figure 23 unless otherwise
noted. Door armrest and trim panel must be removed
and water deflector detached before making
adjustments. After making adjustments, tighten all

DOORS - F STYLE 5H-11
loosened attachments to 10 to 14 N-m (90 to 125 in-lb)
torque.
1. Window Rotated
- Loosen up-stops (2 and 6),
adjust inner panel cam (8) as required and tighten
attaching screws. Adjust up-stops as required and
tighten attaching screws.
2. Window
Upper Edge Inboard or Outboard
-
Loosen the following attachments.
a. Filler at belt (1 and 10)
b. Rear
guide upper support lower bolts (Fig.
3 1, item 5)
Adjust rear guide as needed and tighten bolts.
Adjust and tighten filler assembly.
3. Window Too Far Forward or Rearward
- Loosen
filler assembly bolts (3 and 10). With glass in
half-down position, loosen bolts on rear guide
channel (7). Position glass to opening as needed
and tighten bolts. Position filler to glass and
opening as needed and tighten bolts.
4. Window Too Nigh or Low in Up Position -
Adjust front and rear up-travel stops (2 and 6) as
required.
5. Window Binds
- Ease of window operation and
stability depend to a great extent on the glass
stabilizers (5) at the beltline. Contact should be
enough to stabilize glass but not restrict window
operation.
The door window assembly consists of a
frameless piece of solid tempered safety plate glass. The
glass is riveted to the window regulator sash. Figure 24
illustrates a typical door with the trim panel and water
deflector removed. This figure identifies the hardware
parts of the door.
Removal
1. Remove
door trim panel and inner panel water
deflector.
2. Raise window to half-up position.
3. Punch out center pins of glass to sash channel
attaching rivets.
4. Remove rear guide channel through rear access
hole.
5. Remove up stop.
6. Using a 6.3 mm
(1/4") drill bit, drill out
attaching rivets on sash channel (Fig. 25).
7. Raise
glass to remove from sash channel and
remove glass from door.
Installation
1. Remove drilled
out rivets and shavings from
door.
2. Check rivet bushings
and retainers on glass for
damage. If necessary, remove bushings using a
flat-bladed tool covered with cloth body tape.
Install by snapping rivet retainer into bushing.
3. Lower glass into door and position on sash
channel so holes in sash line up with holes in
bushings and retainers.
4. Using rivet tooi J-29022 or equivalent, install
1/4" peel
type rivet (part no. 20184399 or
equivalent) to retain glass to sash channel (Fig.
25).
5. Install rear guide channel. 6.
Install front up stop to support on inner panel.
7. Before installing trim parts, check window
operation for performance and fit to roof rail
weatherstrip.
8. Install all remaining parts.
WINDOW SASH CHANNEL
Removal and Installation
1.
Remove door trim panel and water deflector.
2. Remove door glass as outlined in the window
removal portion of this section.
3. Slide sash channel off regulator rollers and
remove channel from door through rear access
hole.
4. To install, reverse removal procedure.
WINDOW REGULATOR AND REGULATOR
MOTOR
Removal
1. Remove door trim panel and inner panel water
deflector.
2. Raise window to half-up position and hold in
place by inserting rubber wedge door stops at
front and rear of window between window and
inner panel (Fig. 27).
3. Remove rear guide channel and inner panel cam
channel.
4. Punch out
center pins of regulator rivets; then
drill out rivets using 6.3 mm
(1/4") drill bit.
5. Move regulator rearward and disconnect wire
harness from motor (if present). Disengage roller
on regulator lift arm from glass sash channel.
6. Remove regulator through rear access hole.
CAUTION: If electric motor removal
from the regulator is required, the
sector gear
must be locked in position.
The regulator lift
arm is under tension
from the counterbalance spring and
could cause personal injury
if the
sector gear
is not locked in position.
7. Drill a
hole through the regulator sector gear and
backplate and install a bolt and nut to lock sector
gear in position (Fig. 28).
8. Using a 4.8 mm
(3/16") drill bit, drill out motor
attaching rivets and remove motor from
regulator.
Installation
1. To install motor to regulator, use rivet tool
J-29022 or equivalent, and install 4.8 mm
(3/16")
rivets or 4.8 mm (3/16") nuts and bolts. Remove
bolt and nut used to secure sector gear in position.
2. Place regulator through rear access hole into door
inner panel. If electric regulator is being installed,
connect wire connector to motor prior to
installing regulator to inner panel.
3. Locate lift arm roller into glass sash channel.
4. Using rivet tool J-29022 or equivalent, rivet
regulator to inner panel of door using
1/4"x0.
500" aluminum peel type rivets (part no. 9436175

5H-12 DOORS - F STYLE
1. NUTS - FILLER ASSEMBLY TO SUPPORT
2. SCREWS - FRONT UP STOP SUPPORT
3. BOLT - FILLER ASSEMBLY
SUPPORT
4. RIVET - SASH CHANNEL TO GLASS
5. BOLTS - GLASS STABILIZER
8. BOLT - REAR UP STOP
7. BOLTS - REAR QUIDE CHANNEL
8. BOLTS - CAM CHANNEL
B. RIVET - REGULATOR
10. ADJUSTING STUD AND NUT - FILLER ASSEMBLY
Fig. 23-Door Hardware Attachments

1. DOOR GLASS
2. LOWER SASH CHANNEL
3. REAR GUIDE CHANNEL
4. INNER PANEL CAM CHANNEL
6. WINDOW REGULATOR
6. FILLER ASSEMBLY
7. GUIDE STABILIZER
8. SUPPORT - FRONT UP STOP
G93888-5H-F
Fig. 24-Door Hardware
or equivalent). If rivet tool is not available, use
the following nut and bolt method.
a. Install
U clips on regulator at attaching
locations. Be sure to install clips with clinch
nuts on outboard side of regulator.
b. Locate regulator in door inner panel. If
electric regulator is being installed, connect
wire connector to regulator motor.
c. Locate lift arm roller in glass sash channel.
d. Align regulator with clinch nuts to holes in
inner panel.
e. Attach regulator (and motor) to door inner
panel with
M6.0~1~13 (1/4-20x1/2")
screws (part no. 9419723 or equivalent) into
6 mm (1/4") nuts with integral washers.
Tighten screws to
10 to 14 N-m (90 to 125
in-lb) torque.
5. If electric window regulator is being installed, use
rivet mentioned in step 4 to rivet window
regulator and motor to door inner panel.
6. Replace all previously removed parts.
DOORS - F STYLE 5H-13
1. DOOR GLASS
2. GLASS BUSHING
3. BUSHING RETAINER
4. RIVET
5. SASH CHANNEL
G93072-5H.F
Fig. 25-Installing Glass to Sash Channel
1. WINDOW REGULATOR
2. CAM CHANNEL
3. RIVET-4 L
Fig. 26-Installing Regulator and cam Channel
FILLER ASSEMBLY (AT BELT)
Removal and InstalJation
1. Remove door trim panel and detach water
deflector.
2. Remove front attachments for door weatherstrip
and position weatherstrip to provide access
tb
filler bolts.

5H-14 DOORS - F STYLE
INSERT RUBBER WEDGE DOOR STOPS
BETWEEN
INNER PANEL AND WINDOW
AS SHOWN TO PROP WINDOW IN PLACE
DURING REGULATOR REMOVAL
2
Fig. 27-Door Window Propped in Place for Regulator
Removal
HOLE TO LOCK SECTOR GEAR
Fig. 28-Electric Motor on Window Regulator
3.
Loosen two nuts on filler below beltline (Fig. 29).
4. Remove bolt holding support to inner panel.
5. Remove bolt at lower attaching point.
6. Pull filler up and rotate 90 degrees to remove
through belt opening (Fig. 30).
7. To install, reverse removal procedure.
FRONT UP STOP
Removal and Installation
1. Remove door trim panel and detach water
deflector.
2. Remove bolt holding up stop on inner panel and
remove
up stop.
3. To install, reverse removal procedure.
Fig. 29-Filler Assembly (at Belt)
Fig.
30 - Installing Filler Assembly

DOORS - F STYLE 51.1-15
REAR GUIDE CHANNEL
Removal and lnstallation
1. Raise glass to half-up position.
2. Remove door trim panel and water deflector.
3. Remove three attaching bolts to loosen channel
from inner panel.
4. While pulling channel up and back, rotate
channel
180 degrees and remove from sash roller
(Fig.
32).
5. Remove rear guide channel through rear access
hole.
6. To install, reverse the removal procedure.
1, REAR UP STOP
2. REAR QUlDE CHANNEL
3. REAR GUIDE CHANNEL SUPPORT
4, BOLT
6. BObP(S)
Fig. 3 ?-Rear Up Stop and Guide Channel Support
OUTSIDE MIRRORS
Both the standard mirror and the optional remote
control mirrors are stud mounted to the door outer
panel (Fig.
33). Removal of the door trim panel and
water deflector is required to gain access to the
attaching nuts. Removal of these items is described in
the Door Trim and Door Sealing sections. The remote
control mirror face can be replaced without removing
the entire mirror assembly.
Fig. 32-Installing Rear Guide Channel
1. MANUAL MIRROR
2. REMOTE CONTROL MIRROR
3. ELECTRIC REMOTE CONTROL MIRROR
G92403-5H-F
Fig. 33-Installing Door Outside Mirror
STANDARD MIRROR
Removal and Installation
1. Remove door trim panel and detach inner panel
water deflector enough to gain access to mirror
retainer nuts.
2. Remove attaching nuts from mirror base studs
and remove mirror assembly from door.
3. To install, reverse removal procedure. Be sure
mirror gasket is aligned on door outer panel.
REMOTE CONTROL MIRRORS
The optional left side remote control mirror can
be adjusted from the interior of the car by moving the
control lever.
The mirror face must be replaced with the same
type mirror face when serviced.
Removal and Installation
1. Remove mirror remote control bezel and door
trim panel as described in Door Trim section.
Detach inner panel water deflector enough to
expose mirror retaining nuts.
-
2. Remove mirror base to door outer panel stud
nuts, remove cable from clip and remove mirror
and cable assembly from door.