Frame - Revised Underbody Dimensions
Bulletin 85-10-12Date Dec. '84
Ref. No. 85-090-10
SUBJECT: UNDERBODY DIMENSIONS
MODELS AFFECTED: 1985 ELECTRAS
Section 3, Underbody, of the Body Service Manual is being revised to add the following vertical and horizontal dimensions. The appropriate updated figures from Section 3 are provided for reference.
Horizontal Vertical
C to B R
J to D S to P
Fig. 3-1. UNDERBODY HORIZONTAL AND VERTICAL DIMENSIONS:
1. All dimensions are metric (mm).
2. All control points are symmetrical side to side.
3. All tolerances +/- 3 mm
4. All dimensions are calculated an a horizontal plane.
REF. HORIZONTAL SURFACE VERTICAL SURFACE LOCATION
A Forward edge of lip Lower surface at Engine compartment upper
corner fender rail
B Center forward edge Lower surface Motor compartment side rail
of 22 mm (7/8") long slot
C Center of 18 mm Lower surface Motor compartment side rail
(11/16") hole
D Forward edge of Lower surface Rear longitudinal rail
20 mm (13/16") gauge hole
E Center of shock Lower surface Rear shock tower
forward mounting hole
F & G Radius of forward Centerline of cross Rear compartment pan
edge of cross bar bar lower control cross bar
arm bolt hole
H & I Radius of rearward Centerline of cross Rear compartment pan
edge of cross bar bar lower control cross bar
arm bolt hole
J Forward edge of 22 mm Lower surface Rear longitudinal rail
(7/8") gauge hole
K Center of bolt Lower surface Cradle mount forward bolt
L Center of bolt Lower surface Cradle mount rearward bolt
M Forward and center Top surface Engine cradle
of edge
N Forward edge Lower surface Engine cradle
O Rearward and center Top surface Engine cradle
of edge
P Center of 17 mm Top surface Engine compartment upper
(11/16") forward fender rail
gauge hole
Q Center of 16 mm Top surface Engine compartment upper
(5/8") slot fender rail
R Forward edge of Bottom surface Front shock tower
forward/inboard slot
S & T Outboard end of bolt Center of bolt Forward/upper door hinge
surface bolt (right and left)
ENGINE COMPARTMENT HORIZONTAL DIMENSIONS:
1. All dimensions are metric (mm)
2. All tolerances: +/- 3 mm
3. All dimensions are point to point 3823
REFERENCE METRIC ENGLISH
(MILLIMETERS) (INCHES)
HORIZONTAL
B to B 1005 39-9/16
B to C 930 36-5/8
C to B 1388 54-5/8
C to C 1050 41-5/16
C to D 1926 75-13/16
D to D 1276 50-1/4
D to E 444 17-1/2
D to F 595 23-7/16
D to G 1043 41-1/16
D to H 777 30-9/16
D to I 1156 45-1/2
D to J 1272 50-1/16
E to E 1050 41-5/16
J to D 1692 66-5/8
J to J 989 38-15/16
K to K 1082 42-5/8
K to L 1044 41-1/8
L to L 1109 43-11/16
P to P 1447 56-15/16
P to Q 323 12-11/16
P to S 1074 42-5/16
Q to Q 1465 57-11/16
R to R 1039 40-7/8
R to S 1452 57-3/16
R to T 653 25-11/16
S to P 1870 73-5/8
VERTICAL
A 644 25-3/8
B 281 11-1/16
C 167 6-9/16
D 152 6
E 790 31-1/8
J 317 12-1/2
M 253 9-15/16
N 83 3-1/4
O 140 5-1/2
R 775 30-1/2
Fig. 3-5 Metric to English Dimension Conversion Chart