PAI 631265 DD15 Head Gasket | Replaces OEM A4720161820

PAI 631265 Cylinder Head Gasket for Detroit Diesel DD15 | Replaces OEM A4720161820

The PAI Industries 631265 Cylinder Head Gasket is a premium heavy-duty replacement designed for Detroit Diesel DD15 engines. Manufactured to meet or exceed OEM specifications, this head gasket provides a reliable combustion seal while preventing coolant and engine oil leaks under the extreme temperatures and cylinder pressures found in today's heavy-duty diesel engines.

Built with high-quality multi-layer steel (MLS) construction, the PAI 631265 is engineered for long-lasting durability and dependable sealing performance in both stock and rebuilt engines. Whether you're performing an in-frame overhaul or replacing a failed head gasket, this premium aftermarket gasket delivers the reliability professional diesel technicians demand.

Trusted by fleets, owner-operators, engine rebuilders, and diesel repair facilities throughout North America, PAI Industries is recognized for producing premium heavy-duty replacement parts backed by exceptional quality and fitment.

Key Features

• Premium aftermarket cylinder head gasket
• Precision engineered for Detroit Diesel DD15 engines
• Heavy-duty multi-layer steel (MLS) construction
• Excellent combustion sealing performance
• Helps prevent coolant, oil, and compression leaks
• Manufactured to meet or exceed OEM specifications
• Ideal for in-frame and complete engine rebuilds
• OEM-quality fit and sealing performance
• Backed by PAI Industries quality

Specifications

• Brand: PAI Industries
• Part Number: 631265
• OEM Reference: A4720161820
• Product Type: Cylinder Head Gasket
• Construction: Multi-Layer Steel (MLS)
• Application: Detroit Diesel DD15 Engines
• Condition: New Premium Aftermarket

Applications

• Detroit Diesel DD15 Engines
• Freightliner Cascadia
• Freightliner Coronado
• Western Star 4700
• Western Star 4900
• Western Star 5700XE
• Heavy-Duty On-Highway Trucks
• Commercial Fleet Vehicles

Major Cross Reference Numbers

• Detroit Diesel A4720161820
• Detroit Diesel A4720161520
• Detroit Diesel A4720162220
• PAI 631265E
• PAI 631375 (Head Gasket Set)
• Interstate-McBee A-A4720161820
• Interstate-McBee A-A4720161520
• Interstate-McBee A-A4720162220

Why Replace Your Head Gasket?

A damaged cylinder head gasket can lead to compression loss, coolant contamination, overheating, excessive exhaust pressure, coolant consumption, and catastrophic engine damage if left unrepaired. Replacing the head gasket with a premium-quality component helps restore proper engine sealing and reliability while protecting your investment.

Whenever replacing a DD15 head gasket, inspect the cylinder head for flatness, check the engine block deck surface, replace torque-to-yield head bolts if required, and follow Detroit Diesel torque specifications and tightening procedures for proper installation.