Overcooling

slimx · Postby **slimx** » Thu Dec 08, 2011 6:37 pm

i had this issue in my honda integra.
New thermostat fixed it.

I also had the issue lets say on a cold day..
if i drove at like 150k's lets say on the.. M4 or any high way non stop .. my engine would get colder and colder..

Postby **NitroDann** » Thu Dec 08, 2011 7:08 pm

Should have posted back here a week ago, yeah it was the thermostat stuck 2mm open.

Dann

mitch_f1 · Postby **mitch_f1** » Thu Dec 08, 2011 9:26 pm

This is an interesting thread, as it describes some of my issues. However I think the thermostat may not necessarily be the problem because when I start it the coolant temp on the dash will go to the middle, and then my coolant temp gauge will suddenly rise to 60 or so. I always assumed that this was because the stock temp sensor is at the back of the head, and mine is in the top hose and as a result it would not read until the thermostat opened to allow water through the radiator. Is this a reasonable assumption. However, when driving the coolant temperature is always sitting around the 60*C mark?? I assumed that if it was getting stuck open then it would read a temperature from the moment the coolant started to warm up rather than just jumping to 60*C. Thoughts?

Postby **NitroDann** » Thu Dec 08, 2011 9:31 pm

Just like what I should have done is what you should do. Stop being lazy and grab a 12mm and check the thermostat

You will find out instantly.

Dann

mitch_f1 · Postby **mitch_f1** » Thu Dec 08, 2011 9:37 pm

But is what I am saying making any sense, cause like it has done this from the moment I put a new thermostat in, so I always thought it was normal?

Postby **NitroDann** » Thu Dec 08, 2011 10:01 pm

Yeah i would expect the temp guage to stay still, then move fairly fast if the sender is on the wrong side of the thermostat.

However 60c is FAAAAAAR too low a temp. So you need to fix it. Will it go higher if you just sit and idle it?

Dann

mitch_f1 · Postby **mitch_f1** » Thu Dec 08, 2011 10:33 pm

Yeh it does. It also sits at about 80*C on track. Could it also be that maybe the thermostat is closing, and that the temperature reading is actually from the stagnant coolant in the top hose, and that it is not actually flowing.

project.r.racing · Postby **project.r.racing** » Thu Dec 08, 2011 10:38 pm

faulty gauge or sensor.

Postby **NitroDann** » Thu Dec 08, 2011 10:44 pm

Id be inclined to agree with PRR.

Dann

mitch_f1 · Postby **mitch_f1** » Thu Dec 08, 2011 11:01 pm

I didn't mention that it is a mechanical gauge, with uses an ether filled tube. Would this have any bearing?

Postby **NitroDann** » Thu Dec 08, 2011 11:03 pm

Cannot imagine.
The sender is only 5 bucks swap it first.

Dann

mitch_f1 · Postby **mitch_f1** » Thu Dec 08, 2011 11:05 pm

Well, that's the thing. With the mechanical gauges the sender and the gauge are all one sealed unit. If you remove the sender the ether comes out, and no more gauge.

Postby **NitroDann** » Thu Dec 08, 2011 11:12 pm

Yeah ok... Not sure how mechanical guages work sorry.
Why not just change the thermostat?

Dann

mitch_f1 · Postby **mitch_f1** » Fri Dec 09, 2011 7:52 am

Yeh I think i'm going to anyway. I've had suspicions for a while now

project.r.racing · Postby **project.r.racing** » Fri Dec 09, 2011 9:59 am

if the guage goes up to 60 straight away, then that is kinda a dead givaway. do you think that your coolent can go from cold (15-25C) to 60C in a second? at least that is the way i see it.