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how Does the cooling Fan works on my 1988 Volvo 740 GLE with B230F engine 700

posted by  Sammy29926 on  Fri Sep 17 17:16 CST 2004
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Hi everybody,
I was wondering if anybody can help me out about the princibles of cooling fan on my volvo? I know that i have a cooling fan,and its assemble connected to water pump pulley and another electric fan located at in front of the a/C condester. what is the functions of those fans and how they work?
Thank you
Sammy29926








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    how Does the cooling Fan works on my 1988 Volvo 740 GLE with B230F engine 700

    posted by  spasske on  Sat Sep 18 09:14 CST 2004
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    last visit: Thu Oct 23 10:11 CST 2014
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    The electric fan comes on when the radiator reaches a certain temp and the key is on. I believe newer models may com on when the compressor is engaged.
    --
    Paul NW Indiana '89 740 Turbo 110,000








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    how Does the cooling Fan works on my 1988 Volvo 740 GLE with B230F engine 700

    posted by  faze on  Fri Sep 17 19:59 CST 2004
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    Electric fans run of a thermostat which is why you should be careful around one after you shut a car off...they'll come on sometimes to cool the coolant after the engine has been shut down.

    The fan driven by a belt is probably a clutch fan that is activated by heat too. Generally they spin free until a temp is reached and then a liquid inside the fan housing (around the shaft) will expand and engage the fan and hence will be driven by the belt. It will still spin regardess but when engaged and driven by the belt it pulls air thru the radiator.

    That's why, in a traffic jam on a hot day, you could pop your car into neutral and rev it up to cool the engine. Revving the engine not only drives the water pump faster but speeds up the fan pulling more air thru the radiator.








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      how Does the cooling Fan works on my 1988 Volvo 740 GLE with B230F engine 700

      posted by  ndesouza on  Sat Sep 18 09:55 CST 2004
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      last visit: Sun Mar 18 15:14 CST 2012
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      You dont want to rev in neutral in a traffic jam if you have a ZFHP22 transmission though... (PRND321 gear-shift pattern). Though it would cool your engine, it will fry your tranny very VERY quickly.

      Noel







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