1998 Volvo S70 radiator fan doesn't work.

It has been my experience that both radiator hoses get hard with age, check the hoses for age and cracking because they usually are hard right before they give out. They get hard when they get old due to excessive oil covering because of an oil leak and heat from the engine and the coolant within the hose.

Hi Steve:

The first thing to do is remove the negative battery cable, this will wipe out the presets on you radio and Nav if you have it. If this is not a problem the next step is to find the drain if it has one. You should collect as much of the fluid as possible. You can dump it down the toilette if you have to but dumping is in the storm drain will kill fish, dogs and other pets. They will drink it, it is sweet and it is poison. That said consider replacing the hoses at the same time you will probably damage them and you don\'t want to do this job twice.



Open the radiator cap.



Remover the lower hose and then the upper hose. Some cars and trucks also use the radiator to cool the transmission if this is the case there will be two additional steel tubes attached to the radiator. Spray the threads with liquid wrench or another good quality penetration oil. WD40 is not a penetrating oil. Buy the liquid wrench.

If you are removing the transmission lines you will want to invest in a set of tube wrenches. This might seem expensive but if you strip those nuts you will wish you never tried this job. You can buy them at sears or most auto parts stores if you don\'t have them.



The AC has its own condenser coil, it usually sits in front of the radiator. The condenser coil has aluminum tubes do not disconnect them.



I guess at this point I assumed you removed the cowling. If not you will need to do so. I don\'t know if you have electric fans or a belt driven fan. Some times if you have a belt driven fan you can just move the cowling back and not have to remove it completely. If you must remove it completely you may need to remove the fan first.



With that out of the way there should now be two bolts holding two clamps with rubber bushings holding the radiator in place. Remove these and your ready to remove the radiator.



Best of luck

\'RR

Bad fan relay or fuse bad temperature sensor/sending unit

That's not a problem as far as its not overheating. and if the radiator is bad or there was a leak then the car will be high not low. and i think your your Thermostat is open all the time that's maybe why the car is always Low on Temperature.

done one not so long ago and i had to remove the front bumper and the safety thing behinf the bumper then pump the ac gas out to remove the ac rad then it was easy

Volvo 1990-1998 Repair Guide
Radiator - REMOVAL & INSTALLATION
Perform this work only on a cold engine.

1. Disconnect the negative battery cable.
2. Set the heater control to MAX heat.
3. Remove the expansion tank cap.
4. Place a suitable drain pan into position. Open the **** on the right-hand side of the engine block. Fit a hose to the **** to collect the coolant. Open the radiator draincock.
5. Close the drain cocks when the coolant is completely drained.
6. Remove the cooling fan.
7. Remove the cooling fan shroud.
8. Disconnect the upper and lower radiator hoses

9. On vehicles equipped with automatic transmissions, disconnect the transmission oil cooler lines at the radiator. Plug the lines immediately. Catch the spillage from the radiator in a separate pan.

10. Some vehicles are equipped with a temp sensor on the drivers side top of the radiator, if equipped remove the connector.
11. Remove the radiator retaining bolts and brackets.
_
12. Remove the radiator assembly from the vehicle.

On 850/C70/S70/V70 models, the radiator comes out the bottom of the vehicle.
To install:

1. Place the radiator into position and install the retaining bolts.
2. On automatic transmission vehicles, connect the oil cooler lines.
3. Install the fan and shroud.
4. Install the lower and upper radiator hoses.
5. Connect the expansion tank hose. Make sure that the overflow hose is clear of the fan and is free of any sharp bends.
6. Fill the cooling system through the expansion tank, with a 50 percent antifreeze, 50 percent water solution.
7. Connect the negative battery cable.
8. Run the engine until normal operating temperature is reached.
9. Bleed the cooling system.
10. Check for leaks.
11. Top up the cooling system, as required.
12. Replace the cap.
13. Check and top up the automatic transmission fluid level.

Hope thats help (remember comment and rated this).

before you start taking it to bits have you checked thermostat is opening ok and that radiator is not blocked also that the cooling fans are working a chemical test or sniff test can be done to check for gases in cooling system these engines are strong not prone to head gasket problems

check radiator for leaks and thermostant might not be working alo check transmission fluid some times radiator fluid will mix in with transmission fluid since transmission fluid lines run throug radiator

the coolant tank level rises and lowers according to the temperature of the water when you put a new radiator in you usually fill it right up so the boil off has to go somewhere it should sort itself out in a few days in the meantime just make sure the radiator is full (check it when cold ) and that the coolant tank is within the marking on the tank hope this helps regards Jim

from he Popular Mechanics site if the smell in your car is like maple syrup:


(1) SMELLS LIKE: MAPLE SYRUP
WHEN: After the engine has warmed or possibly even after it's shut off for a few minutes.
THE CULPRIT: Coolant containing sweet-smelling (but toxic) ethylene glycol is leaking from somewhere. It could be coming from a radiator or heater hose, a failed intake manifold gasket or cylinder head. It might be coming from a leaky radiator cap or the radiator itself, especially if you smell it outside the car. A strong odor inside the passenger compartment probably means a bad heater core.