问：加热
我有2004年的雪佛兰Impala 3400，它过热，热量不起作用。有些软管很冷，有些很热，这仅取决于它的变化。系统中没有泄漏（我可以看到），但似乎有空气在系统中。当我打开散热器盖并冷却后，会有很大的压力释放。因此，我对系统进行了审议，这是问题所在，很多它出来了，汽车运转良好，热量持续了大约一个小时左右的驾驶，然后开始升温，热量将开始流入直到温度为止。通道将最大化。我们更换了恒温器，因为我们对其进行了测试，因此我们更换了水泵，因为我们注意到了温度。音调上升了，我们将花瓣放下，音调会下降，但是取代恒温器，水泵和打bur的系统都没有任何作用。我们还冲洗了散热器（所以我们的机械师说）。 The fans are also working. Anything?
My car has 126500 miles.
My car has an automatic transmission.
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我将测试冷却液中的废气，如果存在，这意味着会有头部气体泄漏。如果冷却液水平随时间缓慢下降，这也暗示泄漏，并且压力测试将有助于确定这一点。如果在压力测试期间压力下降，并且没有证据表明外部泄漏，则可以通过头部垫圈泄漏。就被困的空气而言，系统中有高度的清除点，应在添加冷却液时开放以驱逐空气。如果您希望经过认证的机械师诊断此过热问题，请只要求coolant is leaking diagnostic.
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