Coolant System Gaskets, Thermostat and Water Pump Seals

A thermostat gasket seals the thermostat housing to the engine block or intake, while a water pump gasket seals the pump to the block. Both sit in the coolant system, and both fail the same way: slow weeping at first, then a puddle of coolant under the car and a temperature gauge that climbs faster than it should.

CBT Auto Parts stocks coolant system gaskets matched to your engine, from basic thermostat housing gaskets to LS-specific water pump gaskets for performance builds. This collection sits within our wider Gaskets & Seals range, next to engine gasket kits for anyone tackling a bigger cooling system job. Orders ship fast across Australia, most within one business day.

Coolant System Gaskets

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FAQs

1. Is a thermostat housing gasket the same as a thermostat gasket?

Not always. Some engines use one gasket for both; others separate the thermostat seal from the housing seal. Check your engine code to confirm.

2. How do I tell a water pump leak from a thermostat leak?

Trace the coolant to its source. Water pump leaks appear near the pump housing; thermostat leaks show up closer to the housing near the block or intake.

3. Do you stock water pump gaskets for LS engines specifically?

Yes, including LT1, LS2, and LS3 variants, alongside fitment-matched gaskets for other makes and models.

4. Can I reuse a thermostat or water pump gasket?

It's not recommended. Most compress permanently once torqued, so reusing one increases the risk of a repeat coolant leak.

5. How long does a water pump gasket replacement take?

It depends on access. Some sit right up front and take under an hour; others sit behind the timing cover and take considerably longer.