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The BMW Range
5 Series
E39
How to replace actuator for fuel Cap lock?
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<blockquote data-quote="jarance" data-source="post: 405915" data-attributes="member: 21"><p>Theory is wrong. You can see that maximum mark in the expansion tank. There is always a "air" pocket. This is to allow the expansion of heated water. Liquid is harder to compress than air.</p><p></p><p>Air pocket form in the cooling system is a dangerous thing to have. It will prevent the water from flowing properly thru the engine water jacket. Over heating will occurred resulting in crack cylinder head. Have you ever seen a hairline crack or blown gasket. </p><p></p><p>Hairline crack could be due to air pocket and blown gasket could be due to rapid loss of coolant but both are related to overheating.</p></blockquote><p></p>
[QUOTE="jarance, post: 405915, member: 21"] Theory is wrong. You can see that maximum mark in the expansion tank. There is always a "air" pocket. This is to allow the expansion of heated water. Liquid is harder to compress than air. Air pocket form in the cooling system is a dangerous thing to have. It will prevent the water from flowing properly thru the engine water jacket. Over heating will occurred resulting in crack cylinder head. Have you ever seen a hairline crack or blown gasket. Hairline crack could be due to air pocket and blown gasket could be due to rapid loss of coolant but both are related to overheating. [/QUOTE]
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The BMW Range
5 Series
E39
How to replace actuator for fuel Cap lock?
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