Symptoms
None until it fails. A truck without a belt receipt is due.
The fix, step by step
- Disconnect the battery, drain the coolant and remove the fan, drive belts and crankshaft pulley, then the timing covers.
- Set the engine to top dead center and line up the cam and crank timing marks before you loosen anything.
- Fit the new belt and tensioner, check the marks again after turning the engine over twice by hand, and replace the cam and crank seals if they're weeping.
- Many owners do the water pump at the same time.
Tools & part numbers
- Socket set
- crank-pulley holding tool
- torque wrench
- factory service manual.
Where to buy the parts
Timing belt and component kit, 1990 Trooper 2.6RockAuto ↗Amazon ↗
Timing belt tensionerRockAuto ↗Amazon ↗
Camshaft sealRockAuto ↗Amazon ↗
Crankshaft sealRockAuto ↗Amazon ↗
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.