lower radiator hose is supposed to have a coil in it??

[hek1620]

thats what a buddy of mine told me after we were inspecting my motor. i only overheat under heavy load like nailing it in 5th doing like 45 and just riding it out 'till around 80-90. by the time i get there she's on her way to the 4th line on the temp. gauge. normal is under the third line. so anyway, he was squeezing the lower hose and said that it's not supposed to be that soft because when the engine is sucking coolant back through, that hose collapses. is this true? also last night on the highway i was just cruising around 65mph, running normal and all of the sudden the damn temp. needle starts trippin. it was twitching down(colder), for a few seconds the it'll go back to position and do it again in a min. could that be the sensor that's down there on the lower hose i'm talking about? thanks in advance for any help.

[Arrow]

sounds to me like your thermostat is going bad. If it isn't opening properly then the car could begin to overheat (also if it won't open far enough - so it could overheat during heavy load). Also if it happens to get stuck partially open or part of the seal starts to go then the car can get too cold - I had this happen to me where my car temp dropped down to stone cold and then started to go back up a little... but in the end it rested far below normal.

The thermostat is also a cheap and easy part to replace.

[hek1620]

the thermo is new

[ricebike]

nope, not on this car... i did saw a coil on a rad hose in a honda accord though...

that sensor that's in between the lower hoses is for the AC fan...

did you actually see the hose collapsing? is that a new hose? change it out, then...

how's the radiator cap? made sure that u burped the system after the t-stat change?

[hek1620]

i'm pretty sure that the sensor in the hose coming out of the bottom of the radi. is the temp sensor, but whatever. the cap is new. i guess i'm just going to get a new hose and sensor just to eliminate doubts. then i guess te next step is aluminum radi.

[180fan]

A coil? did your radiator hose have bumps on it (looks like a ribbed ....) if so then yes it should have that coil to keep it from collapsing as it's a universal hose. You should look to get a real deal radiator hose. Otherwise, no oem parts do not have the metal coil in it.

[hek1620]

yeah, i found out yesterday when i bought one along with a new temp. sensor. this morning before the car fully warmed up, the temp. needle would drop when i got on the throttle. i hope it's the sensor just needing to be replaced. i checked the plug and it seems pretty solid. gonna put those in this weekend with some water wetter and distilled water.

[ricebike]

i'm pretty sure that the sensor in the hose coming out of the bottom of the radi. is the temp sensor, but whatever.

I'm 100% sure that the sensor on the lower radiator hose is a switch for the A/C condensor fan... FSM verified & answered a couple of days ago...

it's a normally open switch that closes when the temp of the coolant/water mix reaches 198-208 degrees F.

u can verify that if you disconnect the sensor plug & just use an ohmmeter @ the sensor when cold= open circuit & when @ the temp stated above= closed circuit

i'll search for the other thread in a min...

the temp sensors (there's 2 of 'em: one for the gauge cluster that u see & one for the ECU for the computer to see... located if you follow the hose up to the engine block & they're nearby the air bleed bolt)

so just change the lower rad hose & make sure to "burp" the system w/ that air bleed bolt... i had to do mine's 2x to be sure when i did a system flush...

[ricebike]

ok, here's the link from doing a search

red button on upper right hand corner of this site

zerothread?id=168767

zerothread?id=168251

zerothread?id=165116

[hek1620]

so where the hell does the sensor i bought go?

[penpen-commander]

s13 or s14?

[180fan]

what sensor did you get?

[Red coupe]

Did you bleed the coolant after changing the thermistat?

Buying random parts is not a very good way to fix a car, expecialy when you dont even know what they are or where they go.

[hek1620]

well i found it by the bleeder. i got the water temp sens. if parts are cheap, and they haven't been changed in years then for my peace of mind, i buy new ones. and both of these parts( lower hose and temp. sens.) look as old as dirt.

[ricebike]

well i found it by the bleeder. i got the water temp sens. if parts are cheap, and they haven't been changed in years then for my peace of mind, i buy new ones. and both of these parts( lower hose and temp. sens.) look as old as dirt.

well mines are still original 1988-1989 sensors & they're still working

I woulda checked the trouble codes 1st...if it was the sensor for the ecu (w/ 2 terminals)

testing the 1 terminal sensor for the gauge cluster is simple: unhook, use ohm meter & take a reading--- warm it up-- take another ohm reading. temps go up, resistence reading goes down

if needle still acts funny after u installed that 1 terminal sensor, then I'd triple check for air bubbles & made sure u purged it outta the system

[hek1620]

so that other one up by the bleeder(not the temp.) is the gauge sensor?

[180fan]

the bleeder should be on the other coolant elbow. The other temp sensors should be connected to the lower radiator hose in some way like the ac one has that pipe that fits in the middle of the lower hose, the thermo housing has the cts and cluster temp sensors behind it and so on.

[ricebike]

[ricebike]

[hek1620]

i took the one for the cluster out kinda cleaned it, and now no more flickering. 1 down. now, i get that the sensor down there is the a/c condenser fan switch. but my condenser fan runs as soon as u turn the a/c on and continues until i turn it off(i don't understand). i'm going to replace the lower hose cuz it is very old and soft. but i was told today that since i'm running with no tuning and/or bigger injectors, that i could be overheating because i might be running lean. could u run lean enough to overheat, but not blow/melt stuff?

[180fan]

what have you done to your engine?

[hek1620]

its' stock besides the small turbo, big intercooler, sci coil, 3in exh., 2.5in piping. no tuning.

[180fan]

then you're probably overheating with air pockets.

[hek1620]

i've bleed it. someone told me that i might be overheating because i might be running lean.