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Subject:Re: 91 GL running hot all of the sudden
From:John Rodgers
Date:Mon, 25 Aug 2003 15:22:15 -0500

You have a leak!!!!

Also, the cooling system is connected to the AC so the radiator cooling
fan will come on  when the AC is turned on. Also, the Idle stabilizer
system will kick up the idle rpm with the AC on to handle the added load
created by the AC being "ON" and so the engine won't stall at idle
speeds such as at stop lights, etc. That increase in idle rpm needs
additional cooling in hot weather. Thus the radiator cooling fan kicks in.

Regards,

John Rodgers
88 GL Driver

Dan Haydon wrote:

>Hi,
>
>Just a few days ago my wife tells me that the van has been "running hot", and that she's been driving with the heater on to keep the needle from going too high. So I started it up yesterday and it heated up pretty fast....as it approached the led it moved above it and the fan never turned on. I turned on the AC and the high speed fan kicked in.
>
>I'm thinking maybe thermostat or temp senders. Is there a way to check for blockage of coolant flow?
>
>Also, when she was out on the road she emptied a bottle of water in the resevoir, so I need to drain and add more coolant. Is there a bleeder valve somewhere?
>
>Thanks for any direction on this one guys.
>
>Dan Haydon
>
>
>