I was talking with a mate who has a e46 and it always seems to run hot my sr20det never goes above half way on the gauge which I'm happy with
But it started a convosation of what is too hot on an all aluminium engine
What's your guys views I said I'd class overheating as 110c but he said more than that
If you're basing the temp on the dashboard gauge, you're wasting your time...
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Yeah I was I understand it's dampened to stop it flicking all over the place but it can't be that far off surely
Hmmm, don't know about the SX one, but I know early MX5 gauges either indicate cold, middle, or in the red - nothing in between! It's designed that way.Originally Posted by autosri
Comparing OEM gauges for relative coolant temps is madness I'm afraid. Only way to be sure is to get a decent aftermarket gauge and sender.
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My water got to 107deg on track once and it warped my lower inlet manifold. Lucky escape really.
Might plug in my tablet and see what Nissan datascan shows as that must be accurate as the engine uses that input
I'd fit another gauge but I just don't have space to fit another in the carc
110oC is overheating, but as already said, the dashboard gauge is little more than an indication of cold or hot. Halfway on the gauge can be anything from 50oC to 90oC (picking random numbers but that's the design) . The S14 gauge jumps from halfway to red very suddenly if anything is actually wrong, such as 110oC
So it's not a progressive gauge so more 3 positions cold,warm,hot and that's it
Yes; it has a good 30 degree 'dead spot' engineered into the middle of it. Cars are built for retarded owners. Retarded owners would worry about the gauge moving around in small increments - they just need to know it's cold, it's fine, it's a problem.
your best bet is to fit an oil temperature gauge as that is really what matters.
I've got oil temp,oil pressure,voltage, wideband and boost so running out of space
Oil never goes to 100c as I've got a thermostatic oil cooler
to add to what's said above. 110oC is not "overheating" as in damaging the engine, but it is at the top end of temperatures you would want to see on a trackday.
The vital thing is that the coolant does not boil. Boiling coolant creates airlocks and airlocks prevent coolant flow. Boiling is bad.
Plain water boils at approx 100oC
Water with 30% anti-freeze boils at approx 105oC
Water&antifreeze with a 0.9bar radiator cap to give a pressurized system, boils at approx 125oC.
Your 110oC is well below 125oC, but your radiator fan should be trying very hard to prevent temperatures getting anywhere near 125oC.
110oC is certainly pretty hot, but if that's the highest it goes on track, then not really a problem.
In day to day driving, it should be 90oC or thereabouts, being controlled by the thermostat.
I'm going to test my search skills now and find a graph that Mr Bennett posted some time ago. Temperature against Nissan dashboard gauge reading. Wish me luck, chaps.
I would say you don't need a water temp gauge if you have an oil temp one.
if all your water falls out then your dash gauge will point to the sky, then you will look over at the oil temp as that is now what is cooling your engine block.
Nearly there, but found a very funny comment on the way
OK I give up. The original was much more scientific and believable but looked something like this:
The standard S13 or S14 gauge will only move upwards from halfway when temperatures are getting intense. If a problem occurs and serious overheating is happening, the gauge can move from halfway to red within say ten seconds, which is easily missable on road or track.
The old thread I found is here:
http://sxoc.com/vbb/showthread.php?1...-guage-is-Pish
Quite an intense debate on the subjectIt is a TechS13 thread, but the S14 is much the same.
Plug in the PC and you will see that the ECU is reading the actual temperature which will always change depending on the situation. Whereas the dashboard gauge will be rock solid at the halfway mark. From memory it will only rise to the red at 105 and above degrees.
Now keep the PC plugged in and you will see that the ECU reads the actual speed, where as your clocks do not display actual. I can't remember the exact difference but at motorway speed your speedo is actual clocked up to display about 10mph faster than the ECU is reading.
Sorry, I didn't see Jon's posts above! I was beaten to the punch! :-)
In essence the temp gauge on "modern" cars have 3 settings: Cold, Normal and Fuked.
I tried to get my tablet working again but the battery is so dead it won't even charge so looks like I need a new tablet for nds1
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