Factory specifications, fluid capacities, torque values, EPA fuel economy and the federal safety record for the 2002 Montana 4WD.
The 2002 Pontiac Montana 4WD takes 4.5 qt of 5W-30 engine oil.
Quick specs
Fluid capacities, tune-up values and fuel economy at a glance.
Engine oil capacity4.5 qtOEM · verified
Engine oil type5W-30 APIOEM · verified
Lug nut torque100 ft-lbsOEM · verified
Fitment & sizes
Replacement part sizes and factory part numbers — battery, bulbs, filters and belts.
From the factory this vehicle uses a BCI 78 · 600 CCA battery, OE oil filter 12731175. Note the factory front wiper blades and cabin air filter are now discontinued — plan on a superseded or quality aftermarket equivalent, which the part pages below list where known. Each part links to every other vehicle that shares it, so a part you already stock may fit more of your fleet than you'd expect.
Battery groupBCI 78 · 600 CCAOEM · verified
Tire sizeP225-60R16OEM · verified
Wheel / rim6-J inOEM · verified
OE service part numbers OEM · verified
Engine oil filter
12731175 alt 25322835
Engine air filter
19166106
Fuel filter
10290491
Spark plug
19301810
Front wiper blades
10329207 discontinued · alt 10329206
Serpentine belt
12588408 alt 12576454
Thermostat
24507563 alt 10226107
Cabin air filter
10322538 discontinued
Full specifications
Engine, drivetrain, dimensions and economy.
Dimensions & weight NHTSA vPIC
Overall length
201.2 in
Overall width
72.8 in
Overall height
68.1 in
Wheelbase
120.1 in
Curb weight
3942 lb
Track (front / rear)
61.4 / 63.4 in
Weight distribution (front / rear)
59/41
Service quick specs OEM factory data
Capacities, torques and tune-up values from the factory service manual.
This engine holds 4.5 qt of 5W-30 API engine oil. Torque lug nuts to 100 ft-lbs, the oil drain plug to 18.0 ft-lbs. The firing order is 1-2-3-4-5-6. Note the cylinder-head bolts finish on a torque angle (torque-to-yield) — they stretch permanently and should be replaced, not reused, during any head service.
Lubricants & capacities
Engine Oil
5W-30 · API
Engine Oil Capacity
4.5 qt
Engine torques
Intake Manifold to Engine Bolts
Upper: 18 ft-lbs
Exhaust Manifold to Cylinder Head Bolts
12 ft-lbs
Engine Oil Pan Drain Plug
18.0 ft-lbs
Engine Valve Cover Bolts
7.4 ft-lbs
Chassis torques
Lug Nuts
100 ft-lbs
Ignition
Cylinder Firing Order
1-2-3-4-5-6
Spark Plug Manufacturer
AC Delco
Spark Plug Gap
0.060 in
Spark Plug Torque
11.0 ft-lbs
Battery & A/C
Refrigerant
R134a
Oil Group
PAG
Oil Type
46
Oil Capacity
7.77 oz
Standard BCI Group Number
78
Standard BCI Cranking Performance
600 cca
Service checks
Key ON Engine OFF (KOEO)
52-59
Fuel Pump Pressure Minimum
59.0 psi
RPM
42-56 @ Idle rpm
Injector Primary Resistance
11-14 na ohms
Engine Compression
100
Engine Compression
100 Minimum psi
Engine Oil Pressure
60 psi
Engine Oil Pressure RPM
1850 rpm
Brakes
Brake Application
WITH REAR DISC
Torque Caliper to Bracket
33 ft-lbs
Torque to Knuckle
92 ft-lbs
Brake Application
WITH STANDARD
Torque Caliper to Bracket
63 ft-lbs
Torque to Knuckle
137 ft-lbs
Brake Application
WITH STANDARD
Torque Caliper to Bracket
63 ft-lbs
Multi-step torque procedures OEM · verified
Cylinder Head — tightening sequence 2 stages
1
44 ft. lbs.
44 ft. lbs
2
95 degrees.
95 degrees
Factory maintenance schedule OEM · verified
Normal service, condensed from the factory interval matrix.
Under the factory schedule, replace the spark plugs every 100,000 mi; coolant at 150,000 mi. The big-interval services (at 150,000 mi for coolant, and the transmission fluid) are the ones owners most often skip — on a lower-mileage example, assume the original fluids are still in it and check them first.