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If a new cap doesn`t do it, try a new reservoir(m) (archive)

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Posted by John A on April 15, 2002 at 13:32:19:

In Reply to: try a new cap 17 11 1 468 071 posted by MarkPike on April 15, 2002 at 12:04:31:

The plastic lip will distort over time, preventing the cap from sealing. Your symptoms are consistent with the failure of either part. It is normal for the temperature to rise after shutoff, increasing the coolant pressure. I found that a Stant cap would seal on my old distorted tank when a new BMW cap wouldn`t.
88 ///M3 Cinnabar

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