Reviews
Product description
This radiator cap by Blue Print replaces the cap on the coolant expansion tank and helps maintain correct pressure in the cooling circuit, useful when servicing compact city cars. It suits routine maintenance or repairs on small hatchbacks where the original cap has failed or is showing signs of wear.
Key Points
The cap is supplied as a single unit and matches several OE reference numbers listed by the manufacturer. It is compatible with a series of small models from Peugeot, Citroën and Toyota, which makes it a practical spare part for workshop inventories or DIY owners carrying out cooling system checks. The design is straightforward and focuses on restoring the sealing and pressure control functions of the expansion tank. 🚗
Compatibility includes early-generation city cars as well as later variants across model codes, so it is important to verify fitment before installation. The construction material is typical for radiator caps of this type and should perform as expected under normal operating temperatures according to the manufacturer. 🔧
Technical Specifications
- Name: Blue Print ADT39906 Radiator Cap for coolant expansion tank, pack of one
- Compatible makes: Peugeot, Citroën, Toyota
- OE numbers: 01306J5, 1306E4, 1306J5, 155258244, 9678203480, 9638001280, 9681593380, 03637680, 3637680
- Supplied quantity: 1 unit
- Application types: coolant reservoir cap, antifreeze tank cap, expansion tank cap
Usage Recommendations
When replacing the cap, ensure the engine is cold to avoid scalding from pressurised coolant. Fit the new cap so it seals securely and check for any signs of leaks after the engine reaches normal operating temperature. If the vehicle has multiple variants listed, consult the vehicle selector or vehicle documents to confirm the correct model code before fitting. For example, the part lists compatibility with the Peugeot 208 I, Peugeot 107, Peugeot 207 and several Citroën C1 and C3 II variants, as well as Toyota Aygo references, which helps narrow down the appropriate application. ⚙️
Consider that radiator caps can wear with age and may not show visible damage until pressure control is compromised. This cap restores the basic sealing and pressure retention functions, but it may not address other cooling system faults such as a degraded pressure relief valve elsewhere in the circuit.
Price evolution
Description:
This radiator cap by Blue Print replaces the cap on the coolant expansion tank and helps maintain correct pressure in the cooling circuit, useful when servicing compact city cars. It suits routine maintenance or repairs on small hatchbacks where the original cap has failed or is showing signs of wear.
Key Points
The cap is supplied as a single unit and matches several OE reference numbers listed by the manufacturer. It is compatible with a series of small models from Peugeot, Citroën and Toyota, which makes it a practical spare part for workshop inventories or DIY owners carrying out cooling system checks. The design is straightforward and focuses on restoring the sealing and pressure control functions of the expansion tank. 🚗
Compatibility includes early-generation city cars as well as later variants across model codes, so it is important to verify fitment before installation. The construction material is typical for radiator caps of this type and should perform as expected under normal operating temperatures according to the manufacturer. 🔧
Technical Specifications
- Name: Blue Print ADT39906 Radiator Cap for coolant expansion tank, pack of one
- Compatible makes: Peugeot, Citroën, Toyota
- OE numbers: 01306J5, 1306E4, 1306J5, 155258244, 9678203480, 9638001280, 9681593380, 03637680, 3637680
- Supplied quantity: 1 unit
- Application types: coolant reservoir cap, antifreeze tank cap, expansion tank cap
Usage Recommendations
When replacing the cap, ensure the engine is cold to avoid scalding from pressurised coolant. Fit the new cap so it seals securely and check for any signs of leaks after the engine reaches normal operating temperature. If the vehicle has multiple variants listed, consult the vehicle selector or vehicle documents to confirm the correct model code before fitting. For example, the part lists compatibility with the Peugeot 208 I, Peugeot 107, Peugeot 207 and several Citroën C1 and C3 II variants, as well as Toyota Aygo references, which helps narrow down the appropriate application. ⚙️
Consider that radiator caps can wear with age and may not show visible damage until pressure control is compromised. This cap restores the basic sealing and pressure retention functions, but it may not address other cooling system faults such as a degraded pressure relief valve elsewhere in the circuit.



