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Isuzu I-Mark

Maintenance specs for 2 variants of the Isuzu I-Mark — from 1985 to 1989.

19851989 Isuzu I-Mark

1.5L I4 (4XC1) · FWD

70 hp / 87 lb-ft

Engine Oil

Weight10W-30
Capacity3.7 qt

Transmission

Type5-Speed Manual
Fluid75W-90 GL-4

Coolant

TypeGreen (Ethylene Glycol)
Shop coolant

Brake Fluid

TypeDOT 3
Shop DOT 3

Power Steering

TypeManual (no assist)

Fuel

Tank11.1 gal
TypeRegular 87

Tires

Size155/80R13
Pressure (front)28 PSI
Pressure (rear)28 PSI
Shop 155/80R13 tires

Battery

Group size51R
Shop group 51R battery

Spark Plugs

Gap0.04 in
Shop spark plugs

Wiper Blades

Driver18"
Passenger16"
Shop wiper blades

Service Intervals

Oil change3,000 mi
Trans service30,000 mi
Coolant flush30,000 mi
Brake fluid30,000 mi
Spark plugs30,000 mi
Timingbelt — replace at 60,000 mi
Air filter30,000 mi
Drive belt60,000 mi

19851989 Isuzu I-Mark

1.5L I4 Turbo (4XC1-T) · FWD

110 hp / 120 lb-ft

Engine Oil

Weight10W-30
Capacity3.7 qt

Transmission

Type5-Speed Manual
Fluid75W-90 GL-4

Coolant

TypeGreen (Ethylene Glycol)
Shop coolant

Brake Fluid

TypeDOT 3
Shop DOT 3

Power Steering

TypeHydraulic
FluidATF Dexron II

Fuel

Tank11.1 gal
TypePremium 91

Tires

Size175/70R13
Pressure (front)28 PSI
Pressure (rear)28 PSI
Shop 175/70R13 tires

Battery

Group size51R
Shop group 51R battery

Spark Plugs

Gap0.04 in
Shop spark plugs

Wiper Blades

Driver18"
Passenger16"
Shop wiper blades

Service Intervals

Oil change3,000 mi
Trans service30,000 mi
Coolant flush30,000 mi
Brake fluid30,000 mi
Spark plugs30,000 mi
Timingbelt — replace at 60,000 mi
Air filter15,000 mi
Drive belt60,000 mi