R33 Engine Coolant Sensors..

[bumble_bee]

hey i got a '96 r33 s2,

ive notice my temp gauge on the dash sit exactly half-way now, and i swear it didnt sit there b4, use to sit below it wen at normal temp,

so ive flushed my coolant yesterday,still the same..

so im thinkin new thermo or new temp sensors...

the only thing is nissan show two engine coolant temp sensors..wat the hell..

one goes to the gauge, one to the ecu/some computer/thermo?lol

anyone got any ideas??

plus wit the thermostat, theres no gasket, so how do u seal it, i no i gota used liquid gasket, but it weird,do u just cover round the termo, and put the liquid gasket around it??

any info whould be great.

thanks

[d00dz]

Yes one is for the guage. Other one is for the temp sensor for the ECU.

[bumble_bee]

oh ok..tht so..

im gona replace the thermo today..

wheres the air bleed valve for the coolant?

any ideas?

[RBwhatever]

Mine sits half way at normal temp.

PFC reads 80degrees at normal operating temp.

I don't think there's anything wrong with your thermostat or temp sensors.

[RBwhatever]

The air bleed for the coolant is just in front of the right hand side of the plenum. You'll see a nut facing upwards that on a little bracket.

[blind_elk]

What ^^^ said.

[bumble_bee]

The air bleed for the coolant is just in front of the right hand side of the plenum. You'll see a nut facing upwards that on a little bracket.

hey another questions..

is thermo on the outlet or inlet..

and yeah so on the plenum ay..gota take a look..it near the engine temp sensors???

or near the thermo??

[Jmaac]

Inlet

My temp sits about 1/3 way

Temperature may be different because of the % of glycol in your new coolant, clutch on the fan etc.

You may of also poored water on the thermo fan switch which usually shorts them and renders them useless, replace switch not whol fan if thats the case

I think theres also one more bleed valve ontop of the plenum, there are 2 on the Rb30

[d00dz]

Dont have pic of bleed valve but you can kinda see it here..

It's at the top.. above the T piece and to the right of the plennum. You can kinda see it in this pic. It should say "Danger to not turn when hot or something like that"

[bumble_bee]

yeah, thanks found it..

it does say "dont open when hot"

thanks for the pic, it in the top of the picture..u can just c it..

i heard u gota put a hose in ur rad. to make it higher than the air bleed valve..so it can actually bleed..

this tru?

[d00dz]

yeah, thanks found it..

it does say "dont open when hot"

thanks for the pic, it in the top of the picture..u can just c it..

i heard u gota put a hose in ur rad. to make it higher than the air bleed valve..so it can actually bleed..

this tru?

Hose/something that makes the water rise higher to bubble off would make it easier but I just parked the car on a hill or an incline where the engine/radiator part is higher than the rest of the car. Bascially you wanna get rid of all the bubbles/micro bubbles in the coolent system.

This is what I did.. Bleed it.. Drive around for 3mins. Stop bleed it again. Top up with coolant. Drive for 3mins Stop bleed it again. Top up with coolent.. etc etc... Finally leave car cooled for maybe a day, then check the coolant and maybe need to topup again. Untill you feel that all the bubbles in the rad are gone.

[bumble_bee]

yeah, put my new thermostat in..looks lik it has never bein replaced,lol

gauge still sits half-way..mayb im just tripping..lol

and i put a hose in the rad. and opened the air bleed valve..an did that bout 3 times..with coolant coming out the valve..

drove a bit..

topped up again..

and topped up again this morin..

looks all good..no leaks or nothing..

i beleve it would be the gauge sensor..

but im gona get a water temp sensor/gauge anyways...

thanks for all the help..

[RBwhatever]

I don't reckon there's anything wrong with it. I'd worry if the temp started rising closer to the H or 2/3 - 3/4.

But replace it anyway if you'd like for good measure.

[bumble_bee]

yeah..sensors seem fine..

tried using electric contact cleaner on the two sensors..o difference though..

im gona flush my coolant again..but this time add "redlines - thinner than water"

its a little 750ml red solution that u add with only water..

and makes it drop a degrees...

and i asked around work, tech said its good crap..and def. works!!!

im also go change my clutch fan to a thermo fan...

that should make a hell of a difference..