How do you adjust the toe camber on the front suspension of a 1989 nissan d21 pickup truck

Hey Joe,
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This will be VERY helpful...
http://www.rockauto.com/en/catalog/nissan,1989,d21+pickup,2.4l+l4,1210903,literature,repair+manual,10335

the camber is set on these by the bushings (offset) in the spindle platform and the bushing at anchor point near other side of arm , generally its not repairable its replaceable ! the toe is set by the screw adjustments ball joints attached to rack and pinion steering module , also are you sure its not the wheel bent, use the spare tire to ck adjustments or move a back wheel up front and test it again

From the Holden Service CD:

The toe-in specification is deliberately quoted as an angle because wherever possible toe-in should be measured in degrees. Refer below for the recommended wheel alignment settings. These settings are at curb weight, which is the vehicle
in a condition of full fluids, full fuel, no people or luggage.


Front Toe-in Degrees Total 0°10' ± 0°10'
Degrees Per Wheel 0°05' ± 0°5'
Camber - 0°30' ± 0°20'
Caster 7°45' ± 1°15'

Rear Toe : 0 ± 1mm (0°± 0?10mins)
Camber : -1°30mins to -2°30mins
Torque Settings : 65 ± 5Nm

have the wheel alignment checked for correct camber and toe in- toe out adjustment. Check condition of wheel bearings and adjustment. .Check the front end suspension for wear

On these LH body cars, camber is not adjustable. Neither is caster. Those angles are preset by the suspension geometry. However, specifications for them ARE published. Generally, if either of those two parameters are out of spec, then it's likely something is worn or damaged and needs to be replaced.

The only adjustable parameters are to the front and rear toe but specified as "Total Toe" - see note below.
The alignment specs are as follows ...

ALIGNMENT SPECIFICATIONS AT VEHICLE CURB HEIGHT
A. FRONT WHEELS

1. CAMBER
   Acceptable -0.6° to +0.6°
   Preferred +0.0°
   Side to Side Differential
   Acceptable 0.7° or less
   Preferred 0.0°
2. TOTAL TOE - Specified in degrees. See Note Below
   Acceptable 0.4° in -to- 0.0° out
   Preferred 0.2° in
3. CASTER* (reference angle)
   Acceptable +2.0° -to- +4.0°
   Preferred +3.0°
   *Side to Side Caster Difference not to exceed
   Acceptable 1.0° or less
   Preferred 0.0°

B. REAR WHEELS

1. CAMBER
   Acceptable -0.6° -to- +0.4°
   Preferred +0.1°
2. TOTAL TOE** - Specified in degrees. See Note Below.
   Acceptable 0.2° out -to- 0.4° in
   Preferred -0.1° in
   **TOE OUT when backed onto alignment rack is TOE IN when driving.
3. THRUST ANGLE
   Acceptable -0.15° -to- +0.15°

Note: "Total Toe" is the arithmetic sum of the left and right Toe settings. Positive is Toe-in. Negative is Toe-out. Total Toe must be equally split between left and right wheels. Left and Right Toe must be equal to within 0.02° (2 one hundredths of a degree).

Courtesy RJK & Concorde Shop Manual

Are you sure it's the 'camber' needs adjusting? Camber is the measured distance between the two front wheels at the top AND the bottom, measured ACROSS the car.
The most common adjustment used is 'Toe'. It's the same method of measurement as camber BUT is at the Front and Rear edges of the front wheels. (Think of your own feet. toes in, / \. Toes out, \ /).
That hit you mentioned to the left side of the car might also have bent something else, like suspension or chassis.
Get a GOOD wheel alignment specialist to look at it.

The way to do this is with an alignment purchased at your friendly neighborhood service shop.
Trying to count threads on the tie rod (or other means not involving lasers) is not a reliable way to
align your 1997 Nissan pickup.
The tie rod ends are what a mechanic uses to set the toe-in/toe-out component of your alignment.
The other 2components of your alignment are caster and camber.

Before making wheel alignment adjustment, perform the following checks:

1. Tires should be equal in size and runout must not be excessive. Tires and wheels should be in balance, and inflated to manufacturer's specifications.


2. Wheel bearings must be properly adjusted. Steering linkage and suspension must not have excessive looseness. Check for wear in tie rod ends and ball joints.
3. Steering gear box must not have excessive play. Check and adjust to manufacturer's specifications.
4. Vehicle must be at curb height with full fuel load and spare tire in vehicle. No extra load should be on vehicle.
5. Vehicle must be level with floor and with suspension settled. Jounce front and rear of vehicle several times and allow it to settle to normal curb height.
6. If steering wheel is not centered with front wheels in straight-ahead position, correct by shortening one tie rod adjusting sleeve and lengthening opposite sleeve equal amounts.
7. Ensure wheel lug nuts are tightened to torque specifications

Ride Height Adjustment

Before adjusting alignment, check riding height. Riding height must be checked with vehicle on level floor and tires properly inflated. Passenger and luggage compartments must be unloaded. Bounce vehicle several times, and allow suspension to settle. Visually inspect vehicle from front to rear and from side to side for signs of abnormal height.
Measure riding height. See figure. Riding height between left and right sides of vehicle should vary less than 1′ (25.4 mm). If riding height is not within specification, check suspension components and repair or replace them as necessary.
Wheel Alignment Procedures

Honda recommends using commercially available computerized 4-wheel alignment equipment. Follow equipment manufacturer instructions to obtain vehicle alignment settings. Use following procedures for necessary adjustments.
Civic Camber Adjustment
Compare camber settings with vehicle manufacturer recommendations. If camber is incorrect, check for bent or damaged front suspension components. Replace faulty components. Recheck camber.
Civic Caster Adjustment
DO NOT use more than 2 shims. If more than 2 shims are required to adjust caster angle, check for bent or damaged suspension components.
Compare caster settings with vehicle manufacturer recommendations. If caster is incorrect, check for bent or damaged front suspension components. Replace faulty components. Recheck caster.
Civic Toe-In Adjustment

1. Secure steering wheel in straight-ahead position. Measure front wheel toe-in. If adjustment is needed, loosen tie rod lock nuts. Turn both tie rods equally in the same direction until front wheels are in straight-ahead position and toe-in reading is correct. Tighten tie rod lock nuts. Reposition tie rod boots if twisted.
2. Ensure parking brake is released. Check rear wheel toe-in. If adjustment is needed, hold adjusting bolt on rear compensator arm and loosen lock nut. See figure. Adjust rear toe-in by sliding rear control arm until rear toe-in is correct. Install NEW lock nut, and tighten it while holding adjusting bolt.

Wheel Alignment Specifications

• Camber - Measurement in degrees.
  • Front: 0 (range -1 to 1)
  • Rear: 0.33 (range -1.33 to 0.67)
• Caster - Measurement in degrees.
  • 1.17 (range 0.17 to 2.17)
• Toe-In - Measurement in inches (mm).
  • Front: -0 (0)
  • Rear: 0.08 (2.0)
• Toe-In - Measurement in degrees.
  • Front: 0.00 (range - 0.16 to 0.16)
• Toe-Out On Turns - Measurement in degrees.
  • Inner: 41.00
  • Outer: 33.50

Torque Specifications Ft. Lbs (N.m)

• Rear Control Arm Adjusting Bolt: 48 (65)
• Spindle Nut: 136 (185)
• Tie Rod Lock Nut: 41 (55)
• Wheel Lug Nuts: 80 (108)

hope this helps you out.

This may be due to the alignment being out of specification or possibly loose front end parts throwing your alignment out.

Take it to your mechanic and ask them to check your tie rods and then an alignment.