ThePartPilot Used Car Parts

The thermostat housing is part of the engine cooling system. It controls coolant flow between the engine and radiator so the engine warms up correctly and then maintains the proper operating temperature.

On the Volvo C30 1.8 petrol engine, the thermostat assembly is located in the engine bay around the intake / air filter area and is bolted to the engine with coolant hoses and an electrical sensor connection attached.

Buyer check: compare the hose outlet direction, sensor plug, bolt pattern and overall housing shape with your removed part before ordering.

The listing item specifics do not provide a confirmed manufacturer part number and the visible listing photos should be used for physical comparison. Some aftermarket catalogues list related thermostat assemblies for Volvo C30 1.8 B4184 / B4184S11 engines with reference numbers such as:

Volvo 31316344 / Volvo 30711785 / Ford 1450962 / 1358179 / 1355792 / 1355791 / 1312630 / 1302167 / 1566316 / 1476110 / 4M5G-8575 series

These numbers are provided for checking only. They are not guaranteed as stamped numbers for this used part. Always compare your old unit to the photos before purchase or send your registration/VIN through eBay messages for checking.

Required Tools

Socket set, extensions, screwdriver set, hose clip pliers, coolant drain tray, trim tools, torque wrench, fresh coolant, funnel, gloves, eye protection and optional OBD code reader. Exact socket sizes may vary by previous repairs and vehicle specification.

Basic Fitting Steps

1. Allow the engine to cool completely before opening the cooling system.
2. Remove engine cover, intake ducting and air filter box where required for access.
3. Drain coolant safely into a suitable container.
4. Unplug the coolant temperature sensor connector and mark hose positions.
5. Release hose clips and remove coolant hoses from the thermostat housing.
6. Unbolt the thermostat housing from the engine and remove the old gasket/seal material.
7. Clean the mounting face carefully. Do not gouge or scratch the sealing surface.
8. Fit the replacement housing with the correct gasket/seal and tighten evenly.
9. Reconnect hoses, clips and electrical connector.
10. Refill with the correct coolant mix, bleed the system, run to temperature and check for leaks.
11. Road test and re-check coolant level once fully cooled.

Estimated Repair Time

Typical workshop time is around 1.5 to 2.5 hours depending on access, seized clips, coolant condition and whether extra diagnosis is required. We use 2.0 hours below as a simple estimate.

Fitting service: We may be able to offer fitting subject to availability. Please contact us through eBay messages before purchase if you need fitting arranged.

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Global VAT Scheme

We operate under the Global VAT Scheme. No VAT is charged separately and no VAT invoice is supplied for the VAT element.

Buy the Correct Part First Time

Please check the compatibility table, your engine code, your old part shape, hose outlets, sensor plug and bolt pattern. If you are unsure, message us through eBay before purchase and we will help verify fitment where possible.

Return Condition

Parts must be returned in the same condition supplied. Where a returned item has been fitted, used, altered, damaged, dismantled, contaminated, missing components or returned in a different condition, any refund may be reduced in line with eBay rules. Please confirm fitment before ordering to avoid return delays.

♻️ By buying a quality used vehicle part, you help keep usable parts in service and reduce unnecessary manufacturing waste.

🌍 Recycling parts supports a cleaner automotive industry and gives vehicles a second life instead of sending good components to scrap.

🚗 ThePartPilot is a small business focused on correct fitment, helpful support, fast dispatch and great value used car parts.

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