1993 4.6L Overheating problem..............

[dave404]

guys on my former post ,i changed the line underneath the intake. I thought this was my problem but seems it blowed this hose due to overheating.
i have changed thermostat, fan appears tight, water pump no play or leaks.
where do i go from here ?
my fatherinlaw is in hospital(cancer) and we are going back and forth daily about 40 mile round trip. car runs around the "o" on the "norm" at first start and above the "r" as the day gets hotter. will reach the "m" also.
it has always run slightly above the "o" even with ac on.
how do i chk waterpump for circulation.?

[fbi-interceptor]

just because you changed the thermostat does not mean its working, before you put one in you should hold a lighters flame up to it to make sure it opens when the heat is applied. also make sure your clutch fan is working properly. finally if you have fluid in the radiator the only other thing i would think of is getting a different water pump

[jimmytroanoke]

Originally Posted by fbi-interceptor

just because you changed the thermostat does not mean its working, before you put one in you should hold a lighters flame up to it to make sure it opens when the heat is applied. also make sure your clutch fan is working properly. finally if you have fluid in the radiator the only other thing i would think of is getting a different water pump

Better way to check a thermostat is to put it in water on a stove. use a meat thermometer to see what temp it is opening at. Hard to tell on these wonderful cars with no cap on the radiator what kind of condition it is in. You may be able to see a little looking thru the hose inlet and outlet. If you can borrow an Infrared thermometer some shops use them to compare the temp of the inlet and outlet hoses to see if it is cooling. You can also remove the water pump and see if the impeller is eroded away or detached from the shaft.

[dave404]

any tips on removing fan, it does turn clockwise to remove ,doesnt it ? cant get it to budge.

[dave404]

got fan off, it turns counter clockwise. removed water pump and it looks as new.
checked thermostat in a pan of water, opened at correct temp.
put it all back together and left shrould off. took it for a spin until gauge got above the "r"
the bottom part of radiator is cold all the way across and the top part is hot all across.
is this normal or is it clogged.
flushed it good and nothing ugly came out.

[jimmytroanoke]

Originally Posted by dave404

"
the bottom part of radiator is cold all the way across and the top part is hot all across.
is this normal or is it clogged.
flushed it good and nothing ugly came out.

My guess is partially clogged at bottom

[dave404]

Jimmy, you were right. replaced radiator this morn and let it idle a long time with ac on then took it for a test run. temp gauge is holding at the "o"

[jimmytroanoke]

Glad it worked out! 12 years is ok on a radiator. It was probably due.