lovelylexus400 Posted December 30, 2007 Share Posted December 30, 2007 Hi, I believe I asked this question before..but still cann't find the solution for my problem yet...is there a way that I can turn the a/c fan off temperary? when I start the car..the a/c fan will (big single fan in front of the engine..not the two small one for the radiator) turn on and stay running the whole time until the engine turn off..it make alot of fan noise and comsume alot of gas..how do I fix this problem? is there a failure part somewhere to trigger this a/c fan to be on the whole time? any advise? please help..thanks Quote Link to comment Share on other sites More sharing options...
wwest Posted December 30, 2007 Share Posted December 30, 2007 Hi, I believe I asked this question before..but still cann't find the solution for my problem yet...is there a way that I can turn the a/c fan off temperary? when I start the car..the a/c fan will (big single fan in front of the engine..not the two small one for the radiator) turn on and stay running the whole time until the engine turn off..it make alot of fan noise and comsume alot of gas..how do I fix this problem? is there a failure part somewhere to trigger this a/c fan to be on the whole time? any advise? please help..thanks In the center of the engine driven "fan" is a viscous clutch that "stiffens" the coupling to the engine as the heat coming through the radiator rises. When you start the engine cold the fan should simply freewheel, turn but not forcefully. The viscous clutch has likely failed. Quote Link to comment Share on other sites More sharing options...
lovelylexus400 Posted December 30, 2007 Author Share Posted December 30, 2007 any advise for replacing the viscous clutch? thanks Quote Link to comment Share on other sites More sharing options...
eatingupblacktop Posted December 30, 2007 Share Posted December 30, 2007 any advise for replacing the viscous clutch? thanks any advise for replacing the viscous clutch? thanks Here's an excerpt from a posting by 92Lex for replacing a timing belt: Remove air duct - (1) 10mm bolt : Remove fan clutch: http://i140.photobucket.com/albums/r15/gsxr37/103_0330.jpg Remove fan clutch by loosening these 4 bolts behind it: http://i140.photobucket.com/albums/r15/gsxr37/103_0329.jpg The entire posting is at: http://us.lexusownersclub.com/forums/index...=14705&st=0 Here is a link for the option of replacing your mechanical fan with an electric one: http://www.lexls.com/tutorials/cooling/fanconversion.html Quote Link to comment Share on other sites More sharing options...
wwest Posted December 31, 2007 Share Posted December 31, 2007 any advise for replacing the viscous clutch? thanks any advise for replacing the viscous clutch? thanks Here's an excerpt from a posting by 92Lex for replacing a timing belt: Remove air duct - (1) 10mm bolt : Remove fan clutch: http://i140.photobucket.com/albums/r15/gsxr37/103_0330.jpg Remove fan clutch by loosening these 4 bolts behind it: http://i140.photobucket.com/albums/r15/gsxr37/103_0329.jpg The entire posting is at: http://us.lexusownersclub.com/forums/index...=14705&st=0 Here is a link for the option of replacing your mechanical fan with an electric one: http://www.lexls.com/tutorials/cooling/fanconversion.html Oops... Looks as if the LS uses a thermostatic spring for fan clutch control not a VC. Quote Link to comment Share on other sites More sharing options...
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