LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

What can a bad radiator cap do to your vehicles cooling system

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Old 03-21-07, 01:45 PM
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jgmcs
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Default What can a bad radiator cap do to your vehicles cooling system

Also, what are the symptoms of a bad cap, what signs do you look for, when there is no overheating present, and the needle is right in the middle.
Old 03-21-07, 03:08 PM
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pito
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Well first look at the rubber seal under the cap. If it is cracked then time to replace the cap.
Old 03-21-07, 06:08 PM
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steveski
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Great point and very true - my previous 300Z started over heating and after several trips to the shop the mechanic took the cap off and the small rubber gasket had a slight rip in it - enough that when it expands from the heat it blew off steam

Easy and cheap remedy if your ride is overheating.
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