Enginetech GM138HS-A Cylinder Head Gasket Set GM 2.3L 138 DOHC Quad 4 1st Design

The Enginetech GM138HS-A is a cylinder head gasket set engineered for the GM 2.3L/138 CID DOHC L4 16-valve Quad 4 engine. Designed specifically for 1987–1991 applications equipped with the 1st design valve cover and 20-hole timing cover, this set delivers a reliable, leak-free seal for engine rebuilds and head gasket replacements. The Quad 4 engine features a 92.00mm bore and VIN codes A and D.

Important Installation Note: New head bolts are required for proper installation of this gasket set.

Key Features:

• Designed for the GM 2.3L / 138 CID DOHC L4 16V Quad 4 engine (VIN A, D) with 92.00mm bore
• Fits 1987–1991 engines with 1st design valve cover and 20-hole timing cover
• No-retorque head gasket design with virtually no loss in clamping force over time
• Individual gaskets precision die-cut from the correct material and thickness for each application
• Head gaskets perforated to eliminate material separation and leakage
• Coated with a premium silicone blend to allow head-to-block movement and easy removal at future service
• Enginetech Rebuilder's Gasket — specifically engineered for rebuilt engines, not just OE replacement

Enginetech's Fire Seal Technology gasket sets are developed with the professional engine rebuilder in mind. Each component is designed to meet or exceed original equipment standards, ensuring proper compression, optimal sealing, and long-term durability on rebuilt GM Quad 4 engines.