3586703 Aftermarket Volvo Penta KAD32 Heat Exchanger 861091 | Sawley's Select Marine Parts

🔧 Product Description

Aftermarket replacement Engine Heat Exchanger - Replaces Part Number: 3586703

New copper-nickel heat exchanger replacing Volvo Penta 3586703 and earlier 861091. It is designed for the KAD32 cooling system and retains the original end-cover and mounting arrangement.

⚙️ Key Features

• Direct replacement for Volvo Penta 3586703

• Supersedes/cross-references 861091

• Copper-nickel seawater bundle

• Designed for KAD32/KAD32P installations

• Serviceable end caps, gaskets and sacrificial zinc

🧰 Kit / Assembly Contents

• 1 × Complete heat exchanger assembly - P/N 3586703

• 2 × end covers - replacement family MRC860755 where applicable

• 2 × end-cover gaskets/O-rings - supplied according to manufacturer package

• 1 × sacrificial zinc - supplied or ordered according to package

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 3586703 → Supersedes/cross-references 861091

OEM / Related Numbers:

• 861091

• 860755

Aftermarket / Verified Equivalents:

• Mr Cool: MRC3586703CN

• Lenco: LE3586703

• Seakamp copper-nickel KAD32 replacement

🚤 Compatibility

Commonly used on:

• Volvo Penta KAD32-series marine diesel engines

Typically suits:

• Engine / Equipment models:

• KAD32

• KAD32P

• KAD32P-A

• Output / Engine Rating: Approximately 170HP

• Engine / System Type: Inline four-cylinder turbocharged, supercharged and aftercooled marine diesel engine

• Year Range: KAD32 production era

• Serial / Model Identification: Confirm engine serial and compare end-cover/hose orientation.

🔌 Function

The heat exchanger transfers engine or generator coolant heat into the raw-water circuit while keeping the two fluids separated. This maintains the correct closed-circuit operating temperature and protects the engine from direct seawater circulation.

Common signs of failure:

• Engine or generator overheating under sustained load

• Coolant loss without an obvious external hose leak

• Saltwater and coolant cross-contamination

• Restricted raw-water discharge or uneven end-cap temperature

• Corrosion, green staining, cracked solder joints or pressure-test failure

📦 Condition

• New aftermarket replacement part

• Brand new

• Supplied in original or equivalent packaging