Cooling issues!!

[fluffyfreak]

Hey guys! Gotta cooling conondrum going on with my 350 swapped S10. It runs over 200 degrees most of the time, so i replaced the thermostat wuth 165 degree unit, and still having issues. At this point im thinking i need to swap the radiator, and probably the electric fans(which i picked up at the junkyard, and are probably ready to crap the bucket). Is there anything else i could or should try before replacing the rad and fans?

[mongocanfly]

have you checked your radiator hoses? to make sure its not collapsing.....
do you have a fan shroud?

[fluffyfreak]

Originally Posted by mongocanfly

have you checked your radiator hoses? to make sure its not collapsing.....
do you have a fan shroud?

I havent checked the hoses, and yes i do have a fan shroud.

[Dead Parrot]

For a stock 350, a 195 tstat is standard. This will give a running temp of 205~215. Assuming your gauge is accurate, sounds like things were working as designed.

The temp rating on a tstat is the point where it begins to open. Operating temps will be 10~20 higher. With your 165, you should see 175~185 on the gauge.

Might verify your temps with a 2nd source like a laser reader. Possible the current gauge/sender combo is off.

[garyd1961]

Are you running a heater? If not you should run a bypass hose from the intake to the water pump.

[68gmsee]

A little more info..

Does it keep creeping up above 200 degrees?
You said "most of the time." Does it do it when idling or on steady highway speed?

[fluffyfreak]

It goes up steadily, if im cruising along above 35, itll stay about 200, but in traffic, it goes up, and doesnt cool down til i stop and cut it off.


No, no heater or AC

[Warrens69GMC]

Was it a 4.3L s10 you swapped or a 4cyl?

[fluffyfreak]

4.3

[WorkinLonghorn]

Originally Posted by Dead Parrot

For a stock 350, a 195 tstat is standard. This will give a running temp of 205~215. Assuming your gauge is accurate, sounds like things were working as designed.

The temp rating on a tstat is the point where it begins to open. Operating temps will be 10~20 higher. With your 165, you should see 175~185 on the gauge.

Might verify your temps with a 2nd source like a laser reader. Possible the current gauge/sender combo is off.

YES!!!

There is no problem. Did you read the above? -BA

[68gmsee]

Re. staying steady at constant 35mph but overheats in traffic. I had a similar problem in my 68 with 250 six.

First thing I did was replace lower radiator hose. Mine was original.

Next I made sure the fan clutch was okay and stiffened up when engine at operating temperature. It was good.

I replaced the radiator cap and tested the t-stat in boiling water to make sure it was opening all the way. Still ran hot in traffic.

To fix it, I replaced single row for a double row radiator and installed an overflow tube. Been running normal since.

[fluffyfreak]

Originally Posted by 68gmsee

Re. staying steady at constant 35mph but overheats in traffic. I had a similar problem in my 68 with 250 six.

First thing I did was replace lower radiator hose. Mine was original.

Next I made sure the fan clutch was okay and stiffened up when engine at operating temperature. It was good.

I replaced the radiator cap and tested the t-stat in boiling water to make sure it was opening all the way. Still ran hot in traffic.

To fix it, I replaced single row for a double row radiator and installed an overflow tube. Been running normal since.

Thats where im thinking this road is taking me, as i have done the same things. I also have elctric fans, and i do believe they are ****ting the bed

[95 S_Trucker]

What radiator are you using? Factory 4.3 radiator or an upgraded unit?