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 MANUALSBUICK1999REGAL LSREPAIR AND DIAGNOSISENGINE MECHANICALENGINE MECHANICAL - 3.8L V6 - VINS [K & 1]ENGINE SPECIFICATIONSCYLINDER HEAD SPECIFICATIONS
1999 Buick Regal LS
Cylinder Head Specifications
1999 Buick Regal LSSECTION Cylinder Head Specifications
CYLINDER HEAD
| Application | Specification | ||
|---|---|---|---|
| Maximum Warpage | .010" (.25 mm) | ||
| Valve Seats | |||
| Intake Valve | |||
| Seat Angle | 45° | ||
| Seat Width | .060-.080" (1.52-2.03 mm) | ||
| Seat Runout (Maximum) | .002" (.05 mm) | ||
| Exhaust Valve | |||
| Seat Angle | 45° | ||
| Seat Width | .090-.110" (2.29-2.79 mm) | ||
| Seat Runout (Maximum) | .002" (.05 mm) | ||
| Valve Guide Oil Clearance | .0015-.0035" (.038-.089 mm) | ||
RENDER: 1.0x
NO RELATED
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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.