Indmar Marine Thermostat Housing Gasket | Part #531058
Ensure a leak-free thermostat housing seal with this genuine Indmar thermostat housing gasket. A small but critical component — always replace this gasket any time the thermostat housing is removed. Never reuse an old gasket on reassembly.
Compatible with: Indmar marine engines fitted to Malibu, Moomba, Supra, and Tige boats. Contact us to verify fitment before ordering.
531058 or 985006 or 551004 — which gasket do I need?
Indmar uses different thermostat housing gaskets across their engine range. Fitting the wrong gasket risks an incorrect seal and coolant leaks. If you are unsure which gasket your engine requires contact us with your engine serial number before ordering and we will confirm the correct part.
Signs your thermostat housing gasket needs replacing:
- Coolant weeping or leaking around the thermostat housing
- Visible coolant staining or residue at the housing joint
- Thermostat housing removed for any reason — always replace on reassembly
- Overheating caused by coolant loss at the housing joint
Pro tip: Always order your thermostat housing gasket at the same time as your thermostat — having both on hand before starting the job avoids delays mid-service and ensures a complete leak-free cooling system reassembly first time.
Pairs perfectly with:
- 986034 – Thermostat 160° Drilled LT1 & 5.7L F/W
- 866081 – Thermostat Housing Aluminium Full F/W
- 491010 – Thermostat Kit 5.7L
- 685007 – Raw Water Pump Impeller
Features:
- Genuine Indmar OEM thermostat housing gasket
- Seals thermostat housing to engine block
- High temperature rated for cooling system applications
- Single use — always replace, never reuse
- Direct replacement — no modifications needed
Part Number: 531058
In stock and shipped fast from Australia 🇦🇺
