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Operating temperature for Isuzu 4FB1 diesel

Posted: Thu Jan 19, 2012 1:52 pm
by fiatspider
Anyone know the normal operating temperature ofthe 4FB1 engine (from the mid 80's Chevettes, Pups, etc.)? I have this engine installed as a retrofit in a '77 Fiat Spider, but the electric radiator fan is not turning until after the dash gauge reads approx. 200 degrees. Just wondering if this is normal, or if the fan should be kicking in earlier. What would be considered an excessive temperature for this engine? Any advice is greatly appreciated. Thanks

Re: Operating temperature for Isuzu 4FB1 diesel

Posted: Thu Jan 19, 2012 4:06 pm
by gearbox
our big trucks do not turn the fan on until 210 to220 a14 pound cap should let the temp. go to 230 safely running 50% antifreeze
gearbox

Re: Operating temperature for Isuzu 4FB1 diesel

Posted: Fri Jan 20, 2012 9:09 am
by fiatspider
Great, thanks for your help.