Datsun 320 king pin service kit, Each kit has 2 sets of parts, enough to do both sides of the car
2 x 1/2 inch UNF, zink plated, half lock nuts. One has a left hand tread and the other has a right hand tread.
The Datsun 320 front suspension is a very simple torsion bar system with Telescopic shock absorbers. Sadly it uses a combination of kingpins and threaded pivots rather than ball joints which wear out very quickly if not regularly greased.
One of the biggest traps is not noting the very subtle differences between left and right hand suspension components when dismantling and reassembling the front end.
The stub axle knuckle assemblies are different for left and right sides of the car.
The parts manual shows the following part numbers:
If your lucky they may have been stamped as L and R but this isn't always the case. The simple rule is the grease nipples go to the front and the steering stop adjuster goes to the back.
The parts manual diagram above shows a right side assembly 40014-0725
The photograph shows the left and right assemblies, note the opposing positions of the steering stops and the grease nipple locations.
The cotter pin that locks the kingpin into the front upright support is inserted from the same side as the grease nipples. The parts manual does show the cotter pin in the opposite direction.
The front upright supports are also different for the left and right sides of the car.
The parts manual shows the following part numbers:
Annoyingly both left and right units often have the same casting number 5471004301 which is similar to a part number.
Whilst both sides may have started off life as the same casting they were machined differently.
The easiest way to identify which is left or right is the direction of the cotter pin that locks the king pin in place is inserted. The cotter pin goes in form the front of the car and nut and spring washer face the rear of the car. One side of the cotter pin hole is machined flat to accept the nut and spring washer. This flat surface should face the rear of the car.
The other way is to look at the kingpin inclination. Its not easy to see unless to insert the king pin then you can see the top of the kingpin should tilt towards the back of the car and the bottom should tilt towards the front of the car.
The steering arm knuckle assemblies are also different for left and right sides of the car.
The parts manual shows the following part numbers:
Some of the steering arm knuckles have the part number cast into them but thats not always the case.
The arms have a bend in them and they should be installed with the bend towards the outside so that the steering arm ball joint is closest to the inside of the road wheel.
It they are inserted the wrong way around there is insufficient adjustment in the steering arms to correct the wheel alignment and the steering Ackerman angles will also be incorrect.
Note: Ackerman angle is what makes the inner and outer wheels turn through a different arcs when turning.
The King Pin assembly for each side is identical and is made up from the following parts
When installing the king pin assembly the thrust bearing should be placed at the bottom the front upright support with the bearing cup facing down. The shims should be placed at the top of the front upright support. Never put the shims at the bottom as they will not handle the load and will be destroyed by the loads placed upon them.
Before inserting the bushes ensure the inner surface of the stub axle knuckle is clean and there are no scratches. A light hone of the with some medium grade wet and dry sand paper is advised.
It is best to get a machine shop to install the bushes. If the king pin does not rotate freely then the bushes may need to be reamed to size.
Use the "as required" shims to eliminate all end float.
The image here shows the complete right side assembly of the follwing items
Note the orientation of the Grease nipples, Steering lock bolt (hidden from view), Cotter pin and Steering arm knuckle.
On 13th of Ferurary 2024 my N320 was finally finished to the point it could be registered and driven on the road
These shims come in 3 different thicknesses and are required to set the bearing preload and axle float on the rear axles.
This is a second hand item in good condition
Wheel stud suit both front and rear axles on Datsun 320
This is a second hand item in very good condition
This kit consists of one nut (used), one washer (used) and one split pin (new), enough for one side of the car.
This is a second hand item in very good condition
Second hand fuse block (no cover)
Refurbushed remote starter solenoid to work with either Mitsubishi or Hitachi Bendix style starter motors on early E1 engines.
Letter disks to replace the original letter disks in each knob. This is just the Letter "Cl" for the Cigarette Lighter
Each Disk has an adhesive backing but would benefit from using extra adhesive as the inner of the knob is often rough or has limited contact area
Most knobs have a hole that goes right trough the center allowing the old disks to be removed using a thin punch.
As my own Datsun 320 restoration project progresses along no doubt I'll discover more bits that are hard or impossible to find. I also keep an eye on social media to see what parts others are looking for as well.
| Weather Strips | Negotiating to get a few 100m of the door belt or weather strip for the doors made. | |
| Rear Tail Lights | Re-production of the tail light lens for the N320, NL320 and U320 is under way. hopefully these NLA parts will arrive soon | |
| Engine Mounts | Having obtained 2 NOS mounts i'm looking for someone to reproduce them. The first quote that came back was a bit too expensive. I'm still on the hunt for an alternative manufacturer. | |
| King Pin Kits | 20 sets of King pin kits are on thier way from the manufacturer. Each kit inludes 2 x kinpins, 4 x bushes, 2 x bearings, 2 x cotterpins and a selection of shims. I expect them here early 2021 |