Question about 2000 Jaguar S-Type

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Jaguar 1999 s-type 3.0 V6 heater problem. The heater is blowing cold unless the engine rev's are held above 1500, any idea's about what the cause could be?

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You either have a restriction in the cooling system like maybe a restricted heater core or the water pump impellers are corroded and no blades are left. Only way to tell is to remove the water pump and inspect then replace it since its off.
Or remove the heater core hoses and blow thru.
If anyone ever put a stop leak in the radiator this can cause blocked lines.

Posted on Dec 11, 2009

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Regards,DT

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