Thermostat Pressure Relief Spring
E100198
OEM-style thermostat pressure relief spring for Malibu Monsoon LT4 engines. Maintains proper coolant pressure and flow to help prevent overheating and keep your engine running at the right temperature under load.
This small but critical component plays a big role in keeping your Malibu Monsoon LT4 engine running at the right temperature. The thermostat pressure relief spring regulates coolant flow by maintaining proper pressure inside the thermostat housing, helping your engine warm up efficiently and stay protected under load.
Built to OEM specifications, this spring ensures consistent operation of the pressure relief system—preventing overheating, stabilizing coolant circulation, and protecting internal components during hard pulls, long surf sessions, and hot summer days on the water.
Whether you’re servicing your cooling system or rebuilding an LT4 setup, this is the correct replacement to restore factory performance and reliability.
Features:
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OEM-style replacement for LT4 Monsoon engines
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Regulates thermostat pressure relief function
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Supports stable coolant flow and temperature control
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Helps prevent overheating under sustained load
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Precision-formed for consistent, long-term performance
A simple part with an essential job—this spring keeps your cooling system working exactly as Malibu intended.
