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740 Radiator questions

CaliMeatWagon

CaliMeatWagon

Cause of Head Scratching
Joined
Jun 29, 2011
Location
Stockton, California
I grabbed a BlackStone radiator in very good condition from the junk yard today and I have some questions about it. It came from a 91 740 (same as mine), but what I noticed was that it has a different style temp sensor. The one I originally had was the screw in type. The one on the new radiator seems to be a press in type and one I pulled the wires off from the sensor it kinda popped apart. I can reassemble it and it is quite difficult to pop back apart, but I want to know if this is going to create any issues. Any and all help is appreciated. Thank you.

IMG_20130527_170117_zps818fce5e.jpg


IMG_20130527_165840_zps65114f19.jpg
 
That's why many of them are... wait for it...

Zip tied :lol:

No seriously, this is prolly the main place to use a zip tie on a Volvo.

Well one of the first 10? :-P
 
Forget the zip ties. That sensor is toast, but you'll need to make sure the hole is plugged and the sensor body doesn't just fall out, (which they do) ensuring a major PITA highway failure w/coolant loss, use glue to secure it in the rubber gromet.
Goop it up generously;-)

If you really need a sensor there, get a new one. Check the rating of the sensor as AFIK the 940's that had that sensor for the e-fan was used a temp extreme safety turn-on and the one for a 740 aux fan will trip at a lower temp. i.e. the one's that fit/come in them are very high temp trip, and you don't want one of those.
 
Thank you guys. So when I go exchange this at Pick-n-Pull, when car should I grab one from? What would be a bolt on upgrade from stock? This is going in my "fun" car I'm fixing up, so I want something that can do the same job or better and I want to retain the use of the stock temp gauge.
 
Buy a nissens rad. Toss that one .prosper. that one says blackstone on it? Or buy the all metal rad I have 4 sale
 
The Nissens rad uses a screw on sensor. Look for one of these.

NissensRadiator.jpg


240's use the same rad BTW.
 
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