23511219 Aftermarket MTU Detroit Diesel Cooler | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Tandem Gear-Oil and Fuel Cooler - Replaces Part Number: 23511219

New copper-nickel tandem cooler replacing Detroit Diesel 23511219. The approximately 4-inch shell contains isolated gear-oil and fuel circuits and is catalogued for specified 6-71 and 8V-92 marine arrangements.

⚙️ Key Features

• Direct replacement for Detroit Diesel 23511219

• Approximately 4-inch shell diameter

• Separate gear-oil and fuel circuits

• Approximately 2-inch/2.5-inch water-connection configurations by installation

• Copper-nickel seawater bundle

🧰 Kit / Assembly Contents

• 1 × Complete tandem cooler - P/N 23511219

• 1 × fuel circuit with approximately 1/4-inch NPT ports

• 1 × gear-oil circuit with approximately 3/4-inch NPT ports

• 1 × common raw-water circuit

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 23511219 (Detroit Diesel OEM tandem-cooler reference)

OEM / Related Numbers:

• 23511219CN

Aftermarket / Verified Equivalents:

• Lenco: LE23511219

• Seakamp copper-nickel replacement for OEM 23511219

• Mr Cool: MRC23511219CN

🚤 Compatibility

Commonly used on:

• Detroit Diesel marine propulsion packages

Typically suits:

• Engine / Equipment models:

• 6-71 installations specifying 23511219

• Selected 8V-92 installations specifying 23511219

• Output / Engine Rating: Engine rating is marine calibration-dependent

• Engine / System Type: Two-stroke Detroit Diesel marine engine with separate marine gearbox

• Year Range: 6-71/8V-92 production era

• Serial / Model Identification: Confirm engine arrangement, gear model, seawater-hose size and fluid-port orientation.

🔌 Function

The tandem cooler contains two isolated fluid circuits within one raw-water-cooled assembly. It controls the temperature of both connected systems while preventing the oils or fuel from mixing.

Common signs of failure:

• High temperature in either connected oil or fuel circuit

• Water contamination in transmission oil, steering fluid or fuel

• Oil or fuel appearing in the raw-water discharge

• Reduced system performance after prolonged operation

• External leakage, corrosion or failed pressure test

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging