how hot on the gauge is too hot? my car is acting funny with its temp. it seems funny to me but it might be normal. i suspect my water pump. my gauge could also be wack.

 

S4 N/A 1/4th I have noticed on my 13bt swap on a S4 that normal temp seems to be 1/4th acumulated to around 190F in pump housing.

 

i would try not to trust your stocker but 1/4 is where it is suppose to be

 

Anything under that red mark is fine...between 1.4 and 1/2 is the norm.

 

it has been getting up to temp REALLY fast when its cold. then it goes about 3/4 of the way up the gauge and sits. then once i cruise for a mile or so it comes way down. how can i test if my gauge is bad? by the way its a S4 NA.

 

I would not bother personally anymore. Just use an after market water temp gauge. Many users have suggested this others don’t. My recent experience after installing a temp gauge is I do not trust factory anymore.

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/loss-faith-%2Ashakes-head%2A-water-temps-458198/

 

guy, that's not a problem with your guage. If anything, that's a key indication that your guage is functionaing propperly. When was the last time you checked your coolant level?

If I had to pull a key solution out of my ***, I'd say you've got air in your cooling system.

 

I would drill and tap a hole in the cooling system for an aftermarket water temp gauge such as Greddy or HKS. Never can be too sure of these things man, especially when a few degrees can mean the difference of a pricy rebuild or plenty more years of trouble free driving

 

The stock S4 guage reads perfectly fine. I wouldn't invest in an aftermarket guage unless you have a fondness for numbers or more guages...

 

could be your clutch fan, also i would suggest a after market gauge the stock on SUCKS horribly, i run at like 170-180, up hills 190

 

i know ther is a bleeder for the system but where is it?

 

its not the cluch on the fan, i can hear it engage.

 

same thing kinda happens on mine.. i just added coolant.. still kinda goes up about 3/4s and then slightly drops to lil over 1/2 coasting..

i think the bleeder is under the car if i remember from a diagram..driver side..

 

Ahh. The S4 bleed screw is on the side of the top neck on the RAD. The drain plug is on the bottom. The S5 does not have a bleed screw. You need to fill and run it and take off the top cap and fill wile running.

 

Anything over 1/2 is BAD.
We're talking getting over 230F...


-Ted