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Is my cooling system that good? or is my thermostat gone...

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Old 08-26-11, 08:48 AM
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Is my cooling system that good? or is my thermostat gone...

Hey guys! Reciently got an 82 FB and after driving it for a while i've noticed that after it "warms up" the thermostat never goes above 1/4th of the gague.. no matter what...

I know the fan is attached to the engine and that helps in cooling a lot... but im begining to think that my thermostat has been disconnected... is there any way i could tell? i've honestly got no idea what to look for...

Thanks!
-TOFUDRIFTER
Old 08-26-11, 09:49 AM
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Only time my stock in-dash water temp gauge ever rises above the quarter-scale area (or even lower) is if I'm stuck in traffic for hours on a 100*-plus day, and even then I never cross half. My aftermarket oil-temp gauge shows a consistent below 170 temp unless I'm really beating on the old girl.

I did get well into the upper half during a canyon cruise earlier in the summer, but this was running full-grunt up steep grades for long periods.

Your cooling system might just be working properly.

Only two ways I know of to check if you have a thermostat installed:
1) open up the top water pump neck connection and look for it, which makes a mess.
2) from a dead-cold start, open the rad cap and see if you have rapid circulation of coolant taking place. Coolant can only circulate rapidly through the rad in a dead-cold car if the t-stat is either missing, or stuck open.
Old 08-26-11, 09:54 AM
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^What he said, you're more than likely fine as that is the normal spot for the temp to be on the stock 83 and earlier gauges.
Old 08-26-11, 12:12 PM
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Working as designed. Go fix something thats broken now.
Old 08-26-11, 02:44 PM
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same here mine reads at about 1/4 maybe 1/3 but that is abusing the car on a 115 degree Vegas day ... not smart I know
Old 08-26-11, 10:29 PM
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haha thats friggin crazy.. i've always read rotaries overheat all the time... but dayum.. thats a good coolant system XD
Thanks!
i do have to fix my lack of an A/C compressor... and that annoying "buzzer" thats supposed to go off when i over-rev dosent go off... maybe thats a good thing, but i want it fixed anyway..
Old 08-27-11, 12:21 AM
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Originally Posted by TOFUDRIFTER
haha thats friggin crazy.. i've always read rotaries overheat all the time... but dayum.. thats a good coolant system XD
Good enough for a Turbo Rotary, that's for sure..
Old 08-27-11, 01:26 AM
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so where exactly on the gauge is where its starting to get too hot?
Old 08-27-11, 04:40 AM
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Once its gets near halfway keep a close eye on it. Above that shut it off to be safe.

Nothing wrong with your cooling i'd say. Even with 100+ degree temps i'm only at 1/4 -1/3 on the guage with a turbo in the bay
Old 08-27-11, 07:56 PM
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Mines never gone above like.. 1/5th on a really bad day it hits 1/4th...
mmm a turbo... haha XD
Old 08-28-11, 02:40 PM
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The "official" overheat line is the top inside hash-mark, but I'd never let mine get there before finding out whats wrong.

Rotaries (leastwise, the ones with FMOC's) cool just fine so long as they are maintained properly.
Old 08-30-11, 09:52 PM
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Fmoc?
Old 08-30-11, 11:00 PM
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Front mount oil cooler=FMOC
Old 09-03-11, 01:15 PM
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ah, thanks!
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