Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1990RANGER 4WD L4-140 2.3L SOHCREPAIR AND DIAGNOSISMAINTENANCETIMING BELTTESTING AND INSPECTIONPRE-INSTALLATION INSPECTION
1990 Ford Ranger 4WD L4-140 2.3L SOHC
Pre-Installation Inspection
1990 Ford Ranger 4WD L4-140 2.3L SOHCSECTION Pre-Installation Inspection
PRE-INSTALLATION INSPECTION
- Prior to installing the timing belt inspect the teeth of the crank and cam pulleys for burrs or damage. Light burrs may be removed, but any damage which permanently mars the teeth/belt mating surface will require the pulley to be replaced.
- Inspect the inside of the timing belt cover for rubbing or wear. The plastic cover may warp, causing the pulleys or belts to rub against the inside of the cover.
- Inspect the tensioner pulley for wobble or looseness. The pulley should spin freely with no rough spots or lateral (side-to-side) movement.
- Inspect the tensioner pulley surface. It should be clean and free of nicks and burrs. If any damage is noted the pulley should be replaced.
- Inspect the camshaft and crankshaft oil seals for leakage. Any seal which shows signs of leakage should be replaced.
WARNING: Oil leakage will damage the new timing belt.
- Prior to installing the timing belt inspect the teeth of the crank and cam pulleys for burrs or damage. Light burrs may be removed, but any damage which permanently mars the teeth/belt mating surface will require the pulley to be replaced.
- Inspect the inside of the timing belt cover for rubbing or wear. The plastic cover may warp, causing the pulleys or belts to rub against the inside of the cover.
- Inspect the tensioner pulley for wobble or looseness. The pulley should spin freely with no rough spots or lateral (side-to-side) movement.
- Inspect the tensioner pulley surface. It should be clean and free of nicks and burrs. If any damage is noted the pulley should be replaced.
- Inspect the camshaft and crankshaft oil seals for leakage. Any seal which shows signs of leakage should be replaced.
WARNING: Oil leakage will damage the new timing belt.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.