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Discussion Starter · #1 ·
1991 240, 199,960 on the clock. When up to operating temperature and either in city (stop and go) and extended hilly freeway driving, my old friend is threatening to over heat. Or, at least the gauge heads up toward the red.

I kick on the heat, it comes right back down to range.

where, my esteemed group of 240 freaks, should I look to fix this before it becomes a major issue? Thermostat? System flush? Radiator core?

I can't see any leakage around the pump, hoses or tank. The tank is at the indicated proper level. The heat stays hot when at a stop.

As this car will now be my main ride, I need to solve this puzzle, before I move on to tie rods, ball joints, rack, struts/shocks and tires.

Oh, replacement of the sucky stereo too...
 

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Re: cooling issues-'91 sedan (FarmerJohn)

I had similar issues and after examining the radiator,decided it was time to replace it.

I bought a Nissens 3 row metal unit from IPD and installed this, along with new hoses, thermostat and a flush and new Volvo coolant. I also used some Water Wetter in the system.

The result? No cooling issues at all...even in hellishly hot Houston stop and go traffic - my 91 240 sedan stays very cool, indeed. Cooler than it ever ran.

Check the radiator out and if its clogged or old, the Nissens Danish made unit is not overly expensive, a breeze to install and that and a new thermo really solved my cooling issues!

- Brickboy240
 

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Discussion Starter · #5 ·
One of the few things that annoy me with Volvos is the lack of a radiator cap. In order to "check" the condition of the interior of the radiator, I've got to pull a hose. not very convenient, IMO.

Thanks guys, that's pretty much what I thought I was up against. though after thinkng about it yesterday, I do not recall ever hearing the aux fan kick on. Is this normal?
 

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Re: (FarmerJohn)

When the temp gauge is near red safely pull over and raise the hood at hot idle.

If the fan is spinning fully then the thermo fan control switch should be ok otherwise not.

George Dill
 

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Discussion Starter · #7 ·
Re: (gdill2)

Well, the aux fan does not kick on, I tried back hosing the radiator but I'm thinkng that it may not be the problem. While in it's heated state I now notice that the upper hose is bulging at the thermostat. When it cools down, it's really, really rubbery feeling. I can pinch the sucker together with a couple of fingers cold.

I'm hoping that I'm on the right track. Upper-lower hoses and a thermostat. Just need to find a store with it in stock. I'm not big on internet purchases, as I feel that you should support your local brick and morters.

Except the local big box brick and morters suck.
 

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It might be worth checking the exterior of your radiator for clogging before you go any further.

Mine was full of grass, insects etc to the point of being hard to see through. I pulled it out and used a fire pump to blow the debris back out of the radiator (mains pressure didn't do anything for me). I didn't manage to clean it out completely, but it did help significantly, and my electric radiator fan turns on less, and for shorter durations.
 

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Re: cooling issues-'91 sedan (FarmerJohn)

Depending on what you're referring to as the 'aux' fan, many 80's and 90's cars with twin radiator fans used one for primary cooling... the other only kicked in if the A/C was on. When the temp. guage looks scary, pull to the side, pop the hood... and turn on the A/C. Watch the fan... should come on in a minute or two. Of course, the main fan should already be running.

Modified by Alaric at 5:35 AM 7-10-2006
 
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