Join Date: Feb 2006
Location: Workin in the United Arab Emirates; Livin in North Carolina; Born and raised in Southern Utah
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i have an '87 that has had simular issues....
1. one thing that hasn't been mentioned yet is the condition of your radiator cap. yes, sometimes that single, ten dollar part can be one of the causes of an overheat. do you know if it has been replaced? have you checked it lately? visually inspect it and do a pressure check on it.
2.. also, take a look at your overflow resevoir and see it it is full of coolant. sometimes a blockage somewhere can cause the expanded coolant to remain in the overflow tank, instead of flowing back into the system via the line going back up to the radiator cap housing. if your rad cap is failing, then the coolant in the tank won't return. my car was just doing that recently. if not the cap, then you might have another blockage somewhere.
3. sometimes you can look at the heads on the corners and around where the gaskets are seated and you may be able to see evidence of coolant leaking around those areas (dry and wet). this was the case on my car after everything else had been checked. one of the heads was warped and coolant was leaking out.
4. have you had the cooling system flushed? always a good idea.
5. has it boiled over? (coolant coming out of the overflow tank)
All the Gods, all the Heavens, all the Hells, are within you. - Joseph Campbell -
Pooja II ~ 1984 300ZXT 50th AE ~ 2018 - 2019
Pooja ~ 1987 300ZX 2+2 NA2T ~ 2012 - 2018
Suzanna ~ 1983 280ZX Coupe ~ 2010 - 2019
Alana ~ 1976 280z Coupe NA2T ~ 2008 - 2019
Dianna ~ 1980 280ZX Slick Top ~ 2001 - 2007