1. はじめに
This manual provides essential information for the installation, operation, and maintenance of your new BMW Coolant Expansion Tank with an integrated Coolant Level Sensor. The expansion tank is a critical component of your vehicle's cooling system, designed to manage coolant volume changes due to temperature fluctuations and to provide a reservoir for coolant. The integrated level sensor alerts you to low coolant conditions, helping to prevent engine overheating and potential damage.
1.1. 互換性
This coolant expansion tank with level sensor is compatible with the following BMW models:
- BMW E46
- BMW E53
- BMW E83
- 320i, 323Ci, 323i
- 325Ci, 325i, 325xi
- 328Ci, 328i
- 330Ci, 330i, 330xi
- 3.X5、XXNUMX
2.製品オーバーview
The coolant expansion tank is constructed from durable plastic, designed to withstand the high temperatures and pressures of the engine cooling system. It features an integrated coolant level sensor, which is typically made with robust materials like stainless steel for longevity and accurate readings. The tank includes connections for coolant hoses and a cap for filling and pressure regulation.
画像1: クローズアップ view of the integrated coolant level sensor.
Image 2: The coolant expansion tank, showing its main body, cap, and level sensor.
3.インストールガイド
Proper installation is crucial for the safe and effective operation of the cooling system. If you are not experienced with automotive repairs, it is highly recommended to seek professional assistance.
3.1. 安全上の注意
- Ensure the engine is completely cool before beginning any work on the cooling system. Hot coolant can cause severe burns.
- 手袋や目の保護具などの適切な個人用保護具を着用してください。
- 偶発的な電気ショートを防止するために、車両のバッテリーを外してください。
- 古い冷却剤は地方自治体の規制に従って責任を持って廃棄してください。
3.2. インストール手順（一般）
- 冷却液を排出する: Place a drain pan under the radiator and open the drain plug to drain the coolant.
- 古いタンクを取り外す: Disconnect all hoses connected to the old expansion tank. Unclip or unbolt the old tank from its mounting bracket.
- 新しいタンクをインストールします: Position the new expansion tank in the mounting bracket and secure it. Connect all hoses to their respective ports on the new tank, ensuring clampsはきついです。
- センサーのインストール: If the sensor is not pre-installed, insert the coolant level sensor into its designated port on the tank and secure it. Connect the electrical connector to the sensor.
- 冷却剤の補充: Close the radiator drain plug. Slowly fill the expansion tank with the correct type and mixture of BMW-approved coolant.
- ブリードエア： Follow your vehicle's specific procedure for bleeding air from the cooling system. This often involves running the engine with the heater on high and the expansion tank cap off until no more bubbles appear.
- 漏れがないか確認する: After bleeding, inspect all connections for leaks.
- 試乗: Take a short test drive, monitoring the temperature gauge. Recheck coolant level and for leaks after the engine cools.
ビデオ1: 終了view of the Coolant Expansion Tank and its components, useful for understanding installation points.
4. 操作
The coolant expansion tank maintains the correct pressure within the cooling system and provides a space for coolant to expand and contract with temperature changes. The integrated coolant level sensor continuously monitors the coolant volume. If the coolant level drops below a safe threshold, the sensor triggers a warning light on your vehicle's dashboard, indicating that coolant needs to be added.
4.1. Monitoring Coolant Level
Regularly check the coolant level in the expansion tank when the engine is cold. The tank typically has 'MIN' and 'MAX' markings. The coolant level should be between these two marks. If the level is consistently low, investigate for leaks or consult a professional.
ビデオ2: 詳細 view of the coolant level sensor, demonstrating its design and function.
5. メンテナンス
To ensure the longevity and optimal performance of your cooling system, regular maintenance is essential.
5.1. 定期的なチェック
- 目視検査: Periodically inspect the expansion tank for cracks, discoloration, or signs of leaks. Check hoses for cracks or swelling.
- 冷却水レベル: Check the coolant level weekly or bi-weekly, especially before long trips.
- Cap Inspection: Ensure the expansion tank cap is securely tightened and that its rubber seal is in good condition. A faulty cap can lead to pressure loss and overheating.
5.2. Coolant Type
Always use BMW-approved coolant (typically a blue or green ethylene glycol-based coolant) mixed with distilled water according to the manufacturer's specifications. Using incorrect coolant can damage the cooling system components.
6。 トラブルシューティング
Below are common issues and potential solutions related to the coolant expansion tank and level sensor.
| 問題 | 考えられる原因 | 解決 |
|---|---|---|
| Low Coolant Warning Light On | Low coolant level, faulty sensor, electrical connection issue. | Check coolant level and add if necessary. Inspect sensor wiring. If level is correct, sensor may need replacement. |
| Coolant Leak from Tank | Cracked tank, loose hose connections, faulty cap. | Inspect tank for cracks; replace if found. Tighten hose clamps. Replace expansion tank cap. |
| エンジンの過熱 | Low coolant, air in system, other cooling system issues. | Check coolant level. Bleed air from the system. Consult a mechanic for further diagnosis. |
7. 仕様
Key technical specifications for the BMW Coolant Expansion Tank with Level Sensor.
| 特徴 | 詳細 |
|---|---|
| ブランド | BMW |
| 材料 | Plastic (Tank), Stainless Steel (Sensor components) |
| 取り付けタイプ | フランジマウント |
| Output Type (Sensor) | 押し引き |
| Sensing Distance (Sensor) | 12インチ |
| 上限温度定格 | 摂氏125度 |
| メーカー部品番号 | 17117573781 |
| OEM部品番号 | 17 11 7 573 781 |
8. 保証とサポート
保証情報およびテクニカルサポートについては、ご購入時に付属の説明書をご参照いただくか、販売元に直接お問い合わせください。保証請求の際に必要となるため、購入証明書は保管してください。
