high coolant temperature

[janozr1]

Hi , need some help.....
after few moments the car is stopped cooling fans go off but cooling temperature still going up . Go back on the road , and temperature dropped to the normal ........... Stickly thermostat ? or what else can be
wrong ? It was first ride today ater long winter slipping .
thanks for any tipps.
Jano

[GOLDCYLON]

Hi , need some help.....
after few moments the car is stopped cooling fans go off but cooling temperature still going up . Go back on the road , and temperature dropped to the normal ........... Stickly thermostat ? or what else can be
wrong ? It was first ride today ater long winter slipping .
thanks for any tipps.
Jano


Exactly how high did the temperature go up to ?

[janozr1]

while Im driving is temperature arround 90 - 92 celsius , when i stopped car temperature start growing and both fans go on at 96 degrees and temperature claimb to 98 and stay there regardless both fans running.
Before today usually fans were put down temperature in cca 10 -15 sec and they turn off at 90 degrees.
Also check cooling level and it is normal :confused:

[janozr1]

Allready see that i replaced on and off in my first post... sorry for my bad english.

[GOLDCYLON]

Thats 208F so no problem.

[janozr1]

ok , but still dont understand why temp stay there and doesnt dropp if both fans are running , usually were fans put temperature down and turn off for awhile...

[GOLDCYLON]

Allready see that i replaced on and off in my first post... sorry for my bad english.


No problem as stated you are not having a problem those temps are normal.

[janozr1]

GOLDSYLON thanks for replys , It is different like before and I will check everything tomorrow when will be coolant cool again ............
best regards , Jano

[ralph92ZR1]

My 92 has about 22000 miles. 2 years ago, replaced the thermostat and flushed the entire system and filled with GM recommended coolant. With Marc's chip that turns the fans on earlier, even on the hottest days of summer, the temps oscillate from about 197 to 205 deg F. Before this, the hottest was about 230 deg F.
Hope this helps...

[sammy]

have you pulled the radiator cover and see if the fins on your radiator are plugged . our cars are like a hoover vacuum cleaner . they gobble up every thing .plastic bags , leaves and small rodents .jk.i am willing to be that your radiator fins are partially plugged

[tomtom72]

Jano,

I agree with your observation from past years in that once the secondary fan does come on the coolant temp would drop enough to notice it on the gauge. I would look to see if the core has junk stuck in it. I also would think that if there was junk stuck in the core you would see the temps climb much faster than in previous years? I also would just check to make sure the secondary fan relay and the primary fan relay are both working correctly. Just to be sure I covered all the possibilities?

I hate to suggest pulling the shroud as that is a pain in the neck. Maybe you could look in thru the oil cooler side of the radiator or up thru the air intake opening at the front and get an indication if the car sucked up road junk into the core.

:cheers:
Tom

[janozr1]

NONONONO guys everything that you sad is ok jus termperature between engine coolant and radiator is too much different whan fans working , so I think that thermosta 180f becomes too lasy.I will change it and i will report
what hapenning . Bay the way , where is temp.sensor located ?

[GOLDCYLON]

I think on the driver side injector housing. Follow the wires to it.

[Kevin]

ok , but still dont understand why temp stay there and doesnt dropp if both fans are running , usually were fans put temperature down and turn off for awhile...

because that's normal operating range.

[A26B]

Coolant Temp Sensor Location Reference
Located on LH (Driver Side) Injector Housing, under the Plenum.

http://jerrysgaskets.com/store2/root/images/Sensors,%20Cooling%20Temp.jpg

PN 12146312, 2 Pin (ECM) Coolant Temp Sensor
http://jerrysgaskets.com/store2/root/index.php?main_page=product_info&cPath=26&products_id=363

PN 25037346, Button Terminal (Guage) Coolant Temp Sensor
http://jerrysgaskets.com/store2/root/index.php?main_page=product_info&cPath=26&products_id=157

Thermostat
http://jerrysgaskets.com/store2/root/index.php?main_page=product_info&cPath=2_5&products_id=592

[janozr1]

Thanks Jerry for info , first step will be replace thermostat it is easilly do that like change coolant sensor.
jano

[Ccmano]

have you pulled the radiator cover and see if the fins on your radiator are plugged . our cars are like a hoover vacuum cleaner . they gobble up every thing .plastic bags , leaves and small rodents .jk.i am willing to be that your radiator fins are partially plugged

Been there done that! This is your answer.... On first glance mine was clean, but on closer examination the fins of the radiator were plugged with fine sand. They all get this way after 20+ yrs. Had to replace the radiator. Might as well do the thermostat, hoses and belts while your in there. Like the old Fram commercial said "pay me now or pay me later"
H
:cheers:

[janozr1]

I changed thetmostat today and coolant temp. is going down , fans go
off like before if car is not moving and temperature between radiator and engine is not so different .....SO I HAD BAD THERMOSTAT .
On the left side is old one , on the right is new - got it from germanny
Which one is original , or better or what ?
thanks for help,
regards ,Jano


http://img826.imageshack.us/img826/651/img1226lu.th.jpg (http://imageshack.us/photo/my-images/826/img1226lu.jpg/)

[A26B]

The one on the left is the wrong thermostat.

[scottfab]

I changed thetmostat today and coolant temp. is going down , fans go
off like before if car is not moving and temperature between radiator and engine is not so different .....SO I HAD BAD THERMOSTAT .
On the left side is old one , on the right is new - got it from germanny
Which one is original , or better or what ?
thanks for help,
regards ,Jano


http://img826.imageshack.us/img826/651/img1226lu.th.jpg (http://imageshack.us/photo/my-images/826/img1226lu.jpg/)

The one on the right looks like mine. Glad temps seem to be better. I would suggest doing what was poster before about inspecting and cleaning the front of the radiator stack. It's just good maintenance. I installed this screen 14yrs ago and it saves a lot of time. I inspect the screen and clean it twice a year.
http://www.zr1netregistry.com/ZR1_radiatorscreen.htm