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海利通告訴您發動機冷卻系統的保養、維護

發布時間: 2017-03-18 12:10   2172 次瀏覽


 冷卻系統雜質

  冷卻系統在工作一定時間后,內部必然會形成各種污垢。污垢種類因使用條件和保養等因素不同也有許多差異。對于大部分車輛,平時使用水,僅在冬季低溫情況下使用防凍液,這種情況下易出現以水銹和垢質為主的污物;對于長期使用防凍液的車輛,會出現以垢質和凝膠為主的污物。
  污物的其他成分包括:①退化形成的酸質。例如失效的防腐蝕劑,氧化的乙烯或丙烯乙二醇等。②重金屬。③硬水雜質。④物理雜質。例如外來材料(灰塵、砂粒等)和沉淀的添加劑等。⑤電解物。
  冷卻系統主要故障
  發動機冷卻系統的主要故障有三種:
  (1)發動機水溫過高甚至開鍋。
  (2)發動機水溫過低。
  (3)冷卻系統泄漏。
  發動機過熱的原因有多種,***常見的原因是由于冷卻系統內部水垢、水銹及凝膠等污物積聚,堵塞了水道,冷卻系統散熱效果降低所致的結果。以往排除這類故障常用的方法是拆卸水箱進行更換,但事實證明許多車的情況并沒有因此得到改善。
  發動機冷卻系統泄漏的形式主要有水箱漏水、上下水管滲漏及缸墊漏水等形式。
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