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Old 11-27-2002, 15:59   #1 (permalink)
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Question EA Running Cold

My EA runs very cold all the time. Due to an accident I had a few months back, the radiator was replaced with new one and and the thermostat was also replaced just for good measure. The weather was still cold when all this happened so I ignored the fact that the car always sat on the line under the 'normal' zone. Now the temp is around 35 degrees here each day and even when it cops some stick the guage doesn't move. Before the accident the car used to sit in the normal zone and did go up a bit when it'd been driven hard. What are the pro's and con's of my car running so cold?????
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Old 11-27-2002, 16:07   #2 (permalink)
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Every single EA-EB falcon I've ever seen runs with the temperature just under the normal line. Mine only moves up from this when I've got the Aircon on full in the heat. And the fan kicks in and brings it back down straight away anyway. Maybe your old radiator was blocked up inside and was causing your engine to run hotter than normal?

Does the aircon cause it to go up at all?
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Old 11-27-2002, 16:36   #3 (permalink)
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a/c is stuffed, needs a new condensor, tx valve and R134a conversion so therefore i never use it.
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Old 11-27-2002, 16:54   #4 (permalink)
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My ED did this cold running thing for years until one day out of boredom I changed the thermostat for a new one. It now always runs about a 1/4 into the normal range.

Haven't really noticed any difference though it is possible that it was always running rich with the ECU in start-up mode thinking it was always cold.
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Old 11-27-2002, 17:13   #5 (permalink)
 
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MY EB2 usually sits on the O in nOrmal. My mums ED sits just below and my GFs EB sits on the R in noRmal! But they all go up with the aircon on!
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Old 11-27-2002, 17:35   #6 (permalink)
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my ea usually sits between the O and R and usually between the R and M with the aircon on
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Old 11-27-2002, 18:03   #7 (permalink)
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My Ea always sits on "o" and "r" even with aircon its usally there.
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Old 11-27-2002, 18:08   #8 (permalink)
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My existing thermo had the guts ripped out of it and it never left the blue section. I then got a new one cos it was running so rich my oil went black from too much carbon after about 2k's. Then it was running aroung the M of normal...but this was too hot for my liking, so i drilled 8 holes on the edge of the thermostat and it now sits right on the line of the that bar thing that covers normal. Its probably a little cool for my liking now, so i am thinking of closing some of the holes up....


maybe the guy that did your radiator did the dodgy...charged you for a thermostat and didn't put it in......
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Old 11-27-2002, 19:04   #9 (permalink)
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No EA should run below the normal section. It's most likely they have put the wrong thermostat in. When I took mine out of my car cos it was staying under the normal area some idiot had put a 82C rated one instead of the normal 92!

Remember the cooler your engine runs the less power that is generated(heat is what produces the energy for your pistons to move) as well as it's probably not good for your engine to run below the specified range.
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Old 11-27-2002, 19:17   #10 (permalink)
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Quote:
Originally posted by donuts2001
....Remember the cooler your engine runs the less power that is generated (heat is what produces the energy for your pistons to move) ....
donuts2001,

I recall that we've had this discussion before.

What the gauge is measuring is the temperature of the coolant. That's long after the energy has been released (as heat) during combustion. It's measuring how much heat has already been lost from combustion, passed into the head then into the coolant - minus what the radiator has dissapated into the atmosphere.

Just because the gauge reads cool doesn't mean the engine can't make power. Not for the reasons you state anyway. The fact that the ECU gets a temp reading may be making it behave less than optimally for power production however.

I'd like my engine to stay cool without radiator/cooling systems etc. That would mean that ALL available energy from combustion had gone to producing power.
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