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 MANUALSPONTIAC19906000 LE, 4D SEDAN, 2.5 RREPAIR AND DIAGNOSISENGINE MECHANICALMECHANICAL2.5L 4-CYL - VINS [R,U]ENGINE SPECIFICATIONSVALVE/VALVE SPRING SPECIFICATIONS
1990 Pontiac 6000 LE, 4D Sedan, 2.5 R
Valve/Valve Spring Specifications
1990 Pontiac 6000 LE, 4D Sedan, 2.5 RSECTION Valve/Valve Spring Specifications
VALVES & VALVE SPRINGS SPECIFICATIONS
| Application | Specification | ||||
|---|---|---|---|---|---|
| Intake Valves | |||||
| Face Angle | 45° | ||||
| Minimum Margin | .053" (1.35 mm) | ||||
| Minimum Refinish Length | N/A | ||||
| Exhaust Valves | |||||
| Face Angle | 45° | ||||
| Head Diameter | N/A | ||||
| Minimum Margin | .058" (1.47 mm) | ||||
| Valve Springs | |||||
| Free Length | |||||
| VIN R | 2.01" (51.0 mm) | ||||
| VIN U | 2.20" (56.0 mm) | ||||
| Installed Height | 1.68" (42.64 mm) | ||||
| Out-of-Square | .062" (1.58 mm) | ||||
| Pressure (1) | |||||
| Valve Closed | 75 @ 1.68 (34 @ 42.6) | ||||
| Valve Open | 173 @ 1.24 (79 @ 31.5) | ||||
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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.