Sierra Overhaul Gasket Set 18-4384 for GM 181 3.0L CID Engine, S/N 2508261-6229717 (Except 3.0LX)

The Sierra 18-4384 Overhaul Gasket Set is a complete engine gasket kit built for GM 181 (3.0L) CID engines within S/N range 2508261-6229717, except the 3.0LX variant. It bundles the three gaskets most commonly needed during an engine overhaul or top-end service, so you are not sourcing individual gaskets separately or guessing at compatibility.

The set contains a timing chain cover gasket (Sierra 18-0976, O.E. 27-14250), an intake manifold gasket (Sierra 18-0868, O.E. 27-17145), and an exhaust manifold gasket (Sierra 18-2949, O.E. 27-33395). Each component is manufactured from Mallory gasket material in a round shape, designed for precise O.E. Fitment and reliable sealing performance under the heat and pressure cycles typical of a marine engine.

Sierra builds this kit using quality materials and manufacturing processes intended for long service life, so buyers replacing worn or leaking gaskets on a GM 181 (3.0L) engine can perform a proper overhaul with matched, purpose-built components rather than mixed aftermarket parts.

Specifications

• Brand: Sierra
• Manufacturer Part Number: 18-4384
• Product Type: Overhaul Gasket Set
• Engine Fitment: GM 181 (3.0L) CID Engine, S/N 2508261-6229717 (Except 3.0LX)
• Included Components: Timing Chain Cover Gasket (18-0976, O.E. 27-14250); Intake Manifold Gasket (18-0868, O.E. 27-17145); Exhaust Manifold Gasket (18-2949, O.E. 27-33395)
• Material: Mallory
• Color: White
• Shape: Round
• Weight: 1.4 pounds
• UPC: 030999563477

Fitment

• GM 181 (3.0L) CID Engine, S/N 2508261-6229717 (Except 3.0LX)

Replaces (OEM)

• GLM 39060
• Mallory 9-61101

Frequently Asked Questions

What engine does the Sierra 18-4384 Overhaul Gasket Set fit? The Sierra 18-4384 Overhaul Gasket Set fits GM 181 (3.0L) CID engines within serial number range 2508261-6229717, except the 3.0LX variant.

What gaskets are included in the 18-4384 set? The kit includes a timing chain cover gasket (18-0976), an intake manifold gasket (18-0868), and an exhaust manifold gasket (18-2949).

Does the 3.0LX engine use this gasket set? No. The 18-4384 Overhaul Gasket Set is specified for GM 181 (3.0L) CID engines in the S/N 2508261-6229717 range, excluding the 3.0LX variant.

What material are the gaskets made from? The gaskets in the Sierra 18-4384 set are made from Mallory gasket material in a round shape.

How much does the 18-4384 gasket set weigh? The Sierra 18-4384 Overhaul Gasket Set weighs 1.4 pounds.

What OEM numbers does the 18-4384 set cross-reference to? The Sierra 18-4384 Overhaul Gasket Set cross-references to GLM 39060 and Mallory 9-61101.

What is the O.E. Number for the timing chain cover gasket in this kit? The timing chain cover gasket included in the 18-4384 set (Sierra 18-0976) corresponds to O.E. Number 27-14250.

What is the O.E. Number for the intake manifold gasket in this kit? The intake manifold gasket included in the 18-4384 set (Sierra 18-0868) corresponds to O.E. Number 27-17145.

What is the O.E. Number for the exhaust manifold gasket in this kit? The exhaust manifold gasket included in the 18-4384 set (Sierra 18-2949) corresponds to O.E. Number 27-33395.

Is the Sierra 18-4384 gasket set genuine OEM or aftermarket? The 18-4384 Overhaul Gasket Set is a Sierra-branded replacement kit engineered for O.E. Fitment on qualifying GM 181 (3.0L) engines, not an original GM-branded part.

What color are the gaskets in this set? The gaskets in the Sierra 18-4384 Overhaul Gasket Set are white.

Can I use this set for a general engine overhaul on a GM 181 3.0L? Yes, the 18-4384 set bundles the timing chain cover, intake manifold, and exhaust manifold gaskets needed for a top-end overhaul on the specified GM 181 (3.0L) engine range.