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DX overheating due to crack in top water box.
Put in a new one and later discovered transmission flud leaks at fitting in lower water box.
Should I get a new one or try some additive in fluid? Lucas oil temporarily?

 
Rep Power: 518

Tighten the fitting...... or take the radiator back to the place of purchase and have them tighten it or replace it.

 
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OK. Thanks.
Hope to check it again and try to tighten this evening.
Even wonder if the transmission hose side of the two piece fitting could be removed to add some kind of sealant to the treads.


Tanks again for reply.

 
Rep Power: 518

I'd guess that if it has a pipe that sticks out at an angle or is curved, it is a single flare fitting which should not need any sealant as long as the fitting is tight enough.



You could just tighten it at first and see if that takes care of it, or take it all the way apart and see what's in there.

 
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Have not seen the needle on temp gauge move to middle of scale or to a horizontal position.
Read that water temp has to be 290° before fan comes on. Have never heard or seen fan come on except for direct connection to battery or jumper switch connector. Checked for continuity of switch. Needle for ohm reading went about 3/4 ways to 0. Wondered if that is still to much resistance in switch for fan to come on.

 
Rep Power: 308

Are you sure it is a switch ?? It may be a thermistor you are reading across.

 
Rep Power: 518

WHOA!!!! Try 200*, not 290*

There are three separate temperature sensors:
One for the computer,
one for the gauge
one for the radiator fan.

If you are waiting for the fan to run and just idling, it can take a really long time....and any breeze blowing through the radiator can delay fan operation.
Which one were you testing?
The fan switch is the fat one on the thermostat housing.
Jumper the two wires in the connector and the fan should kick on (key turned on).
The switch itself should only test as open or closed circuit, depending on the temperature.

 
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Don't know what kind of switch it has . The switch is on the thermostat housing.
200° is what I meant to type. Relieved to know fan just may not be coming on.

Guessing someone went to break or lunch and did not tighten fittings before shipping out this radiator.

 
Rep Power: 518

The fan switch is a simple on/off type, controlled by temperature.

Turns on at around 197-200 ish, and turns off about 6 degrees lower than the on point.



You aren't the only person to have the issue, that's for sure.