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 MANUALSOLDSMOBILE1998ACHIEVA 3.1 M, 4T40E/MN4REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEAPPLICATIONENGINE/VIN BREAKDOWNMODEL IDENTIFICATIONENGINE CODE LOCATION

1998 Oldsmobile Achieva 3.1 M, 4T40E/MN4

Engine Code Location

1998 Oldsmobile Achieva 3.1 M, 4T40E/MN4SECTION Engine Code Location

ENGINE CODE LOCATION ⁽¹⁾

Engine Code

Location

LD8

On right front of engine, on rocker cover, OR on right front of engine block, forward of transmission extension.

LD9

On engine block, near oil filter, OR on left rear of engine, on bellhousing flange, OR On top front of engine block, near timing chain.

LL0

On left rear side of engine.

LN2

On left side of engine block, under exhaust manifold, OR on left rear of engine, on bellhousing flange.

LP2, LS1 & LV6

On left rear of engine block, on bellhousing flange.

LX5

⁽²⁾

L24

On left rear side of engine.

L36

On left side of engine, on rocker cover, OR on left rear of engine, on bellhousing flange.

L37

On right front of engine, on rocker cover, OR on right front of engine block, forward of transmission extension.

L47

On right front of engine, below cylinder head, OR on left front of engine, below cylinder head.

L67

On left front of engine, below cylinder head, OR on left rear of engine, on bellhousing flange.

L81

On left rear of engine, on bellhousing flange.

L82

On left rear of engine, on oil pan, OR on right side of engine, on rocker cover, OR on left rear of engine, on bell housing flange.

⁽¹⁾	See ENGINE in the MODEL IDENTIFICATION table for engine code location prefix (RPO).

⁽²⁾	Information not available at time of publication.

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.