Symptoms
Rear doors that sag, bind or don't latch properly. Isuzu's 1992 recall (92V093) covered 1984–87 trucks for exactly this in salt-belt states.
The fix, step by step
- Support each door before you work on it.
- Soak the hinge pins with penetrating oil, work them free, clean the knuckles and grease them.
- Treat rust around the hinge mounts and the bottom of the door shells.
- Then adjust the latch strikers so each door closes positively, with no false latch.
Tools & part numbers
- Penetrating oil
- brass drift
- grease
- rust converter and paint
- screwdrivers for striker adjustment.
Where to buy the parts
Body and lamp parts catalog, 1990 TrooperRockAuto ↗
Hunting a used or discontinued part? Search eBay Motors for Isuzu Trooper (first generation) parts →
Rated for a competent home mechanic with a decent tool kit. Confirm torque figures, fluids and procedures against the factory service manual for your VIN, support the truck on stands rather than a jack, and work at your own risk (disclaimer). Some parts links are affiliate links, which pay us a small commission at no cost to you.