1990 Nissan d21 cooling system help.

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Jun 8, 2009
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Maryville, TN
Hi all,
I recently purchased a 1990 Nissan pickup with the KA24E engine. The first few days I drove it, it was overcooling temp would just barely be above cold mark. I think thermostat stuck open. That goes on for a couple days then on my way home it begins to overheat (it was running cold the earlier part of the day.) I get it home replace the thermostat, water pump and fan clutch also (figured might as well while im in there). Still it overheats. I used the air bleed screw to bleed air out and with a funnel in the rad neck let it run until the thermostat opens, but it acts like it isnt opening. It has a almost new radiator but i checked it for clogs anyway.

Sorry for the long post but any input would be appreciated.
 
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