Volvo Penta KAD42 KAD43 Thermostat Housing - 3583098
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The Volvo Penta 3583098 is a genuine Volvo Penta OEM thermostat housing used in select Volvo Penta marine diesel cooling systems. This housing forms part of the thermostat and coolant/raw-water routing assembly, helping direct coolant flow through the engine so operating temperature can be controlled correctly.
This housing is commonly associated with select Volvo Penta KAD, KAMD, and related 42/43-series diesel engines where the factory parts diagram calls for 3583098. Fitment should always be confirmed by engine model, serial number, cooling-system layout, and thermostat housing diagram before ordering.
Key Features
- Genuine Volvo Penta OEM thermostat housing.
- Volvo Penta part number: 3583098.
- Cooling system / thermostat housing component.
- Used to house and support thermostat-related coolant flow where specified.
- Helps regulate engine temperature by routing coolant or raw-water flow through the correct cooling passages.
- Marine-use cast housing for diesel engine cooling-system service.
- Important replacement part for corroded, pitted, cracked, leaking, or distorted thermostat housing castings.
- Related legacy or complete assembly references may include 860449 and 838705, depending on model and diagram.
Engine Compatibility
Common application context includes select Volvo Penta marine diesel engines where the factory parts manual calls for 3583098, including:
- KAD42A
- KAMD42A
- KAD43P
- KAMD43P
- Select related 42-series cooling-system configurations where specified.
- Select related 43-series cooling-system configurations where specified.
- Select early 44-series or related KAD/KAMD configurations only where the parts diagram confirms this housing.
Use this thermostat housing only where the Volvo Penta parts diagram specifically calls for 3583098 or a confirmed related assembly reference.
Serial Number Fitment Notice
Confirm fitment by Volvo Penta engine model, serial number, thermostat housing layout, thermostat count, hose routing, bypass configuration, and cooling-system diagram before ordering. Similar KAD and KAMD diesel engines can use different thermostat housings, gaskets, O-rings, covers, hose connections, and bypass arrangements depending on production range and cooling-system configuration.
When This Part Needs Replacement
Replace this housing if the original casting is cracked, corroded, pitted, leaking, warped, heavily scaled, or damaged around the thermostat seat, hose connections, or sealing surfaces. Replacement may also be needed when repeated gasket leaks, coolant seepage, overheating, poor temperature control, or internal corrosion are found during thermostat service.
Installation Notes
Inspect the mating surfaces, thermostat seats, hose necks, plugs, sensors, covers, bolts, gaskets, and O-rings before installation. Clean the surrounding cooling passages and remove scale or corrosion carefully without damaging the sealing surfaces. Replace disturbed gaskets and O-rings during installation rather than reusing compressed or hardened seals.
Install the correct thermostat or thermostats for the engine model and follow the Volvo Penta service procedure for torque, sealant use, coolant refill, raw-water bleeding, and leak checks. After installation, run the engine to operating temperature and confirm stable temperature control with no coolant or raw-water leaks.
Alternate/Superseded Part Numbers
- 3583098 — Volvo Penta OEM thermostat housing part number
- 860449 — related complete assembly/reference number; verify by engine serial number and diagram
- 838705 — legacy/reference number; verify by engine serial number and diagram
Parts Desk Insight
Thermostat housings on older Volvo Penta diesel engines often fail from internal corrosion, scale buildup, and sealing-surface pitting rather than obvious external damage. When replacing the housing, service the thermostats, gaskets, O-rings, hose connections, and related cooling hardware at the same time. Correct fitment depends on the cooling-system diagram, not just the engine family.
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Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
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