By placing a 2 x 1 mm thick washers under each of the three bolts (between hinge and car body) on the lower hinge, I was able to raise the door to the strike plate level (sag was causing door to rest on bottom of door guide - about a 1 cm sag). This saved buying one or two hinges @ $70AUD ea. And it also bought the top corner of the door back in tight to the frame. there were no stress cracks around the bolt holes - it was just that the hinges had worn down over the 340,000 km or so. I of course removed the spare wheel (culprit) from the gate b4 making the mods to make re-tightening a little easier. When I fixed the spare wheel back on to the gate, it sagged about 1 mm more under the extra weight. Formulas used :
on road = 1 x 1mm washer / 500,000 km
off road = 1 x 1mm washer / 170,000 km
on road = 1 x 1mm washer / 500,000 km
off road = 1 x 1mm washer / 170,000 km
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