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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSFORD1990RANGER 4WD L4-140 2.3L SOHCREPAIR AND DIAGNOSISSPECIFICATIONSMECHANICAL SPECIFICATIONSENGINECYLINDER HEAD ASSEMBLYVALVE SPRING
1990 Ford Ranger 4WD L4-140 2.3L SOHC
Valve Spring
1990 Ford Ranger 4WD L4-140 2.3L SOHCSECTION Valve Spring
Spring Length W/Damper Removed, Compression Pressure (Lb. @ Spec. Length)
Intake and Exhaust (Installed) 71-79 @ 1.52 inch
Intake and Exhaust (Valve Open) 128-142 @ 1.12 inch
Intake and Exhaust (Valve Closed) 67-74 @ 1.52 inch
Free Length (Approximate) 1.877 inch
Assembled Height 1.49-1.55 inch
Service Limit 5% Pressure Loss @ Specified Length
Out of Square Service Limit 5/64 (0.078)
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.