Guest Rab88 Posted April 2, 2007 Share Posted April 2, 2007 Just been down to the mechanics there to see about an issue with the car... Right now i'm not getting any hot air to the inside of the car. The viscous fan at the front of the car seems to vary with revs, which, is obviously to keep the whole engine cool. The fan also does not move freely when the engine is off - when the fan is turned by hand, the whole engine turns over. This has led me to believe that the fan has become deliberately ceased, in order for it to vary with RPM and keep the engine cool... does the engine think it's overheating?? and hence is varying the fan with RPM? I'm not sure if both issues are linked. The thought was by the mechanic that the viscous fan hub need replaced. And that due to the fan varying with the RPM, the engine cannot heat up properly, and therefore there is no heat to the inside. OR, is there a problem with the thermostat? I.E, the car thinks it's overheating, therefore ceases the viscous fan to vary with RPM, and therfore there is no heat to the interior? Any help much appreciated!!! Rab. Link to comment Share on other sites More sharing options...
TLicense Posted April 2, 2007 Share Posted April 2, 2007 Rab, I think your mechanic may be right on this. The viscous bit in the viscous fan can become knackered, so that it's locked up all the time. Sounds to me like that's what has happened to yours. I would replace that first, and then see if you have issues. Link to comment Share on other sites More sharing options...
cookci Posted April 2, 2007 Share Posted April 2, 2007 the fan sounds knackered but i think you must have another problem also. what does you temp guage sit at? Link to comment Share on other sites More sharing options...
Kranz Posted April 2, 2007 Share Posted April 2, 2007 A combination of a stuck open thermostat (knackered) and a siezed viscous fan will give the engine no chance to warm up. Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 2, 2007 Share Posted April 2, 2007 A combination of a stuck open thermostat (knackered) and a siezed viscous fan will give the engine no chance to warm up. Agreed, get a new viscous hub, and a new genuine Toyota thermostat. The engine will be a LOT quiter, and you should be a LOT warmer Link to comment Share on other sites More sharing options...
Guest Rab88 Posted April 2, 2007 Share Posted April 2, 2007 Thanx for the help. The coolant temperature sits at half way as normal. I'll go ahead and replace the hub and then see what other problems remain. Does anyone know where I could get this from? Rab Link to comment Share on other sites More sharing options...
Sean1933 Posted April 2, 2007 Share Posted April 2, 2007 You need to get that changed asap, and dont drive it. I drove my old supra with a locked viscous van (didnt know at the time!) and it vibrated the pulley it is attached to and cracked the waterpump that is on the other side...it was a cambelt off jobby to fix Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 2, 2007 Share Posted April 2, 2007 Toyota dealer part, I wouldn't recommend risking a used one. Link to comment Share on other sites More sharing options...
Jake Posted April 2, 2007 Share Posted April 2, 2007 I drove my 93 RZ Auto with a seized fan for over a year. Dude kept nagging me to get it changed and to be fair when I did eventually change it I noticed that the car idled so much better, much smoother. I'm not sure why you shouldn't use a second hand one though. They either work or they don't. It's not like they fall apart. Link to comment Share on other sites More sharing options...
Chris Wilson Posted April 2, 2007 Share Posted April 2, 2007 Tell that to my Mercedes owning customer with the 980 quid plus painting bonnet, plus new viscous coupling and fan They can seize and go out of balance and break the (relatively thin) shaft. Their inertia is pretty awesome. Given they have a very finite life, and failure can be ludicrously expensive, I'd recommend a new one if budget even 1/2 permits. Link to comment Share on other sites More sharing options...
TLicense Posted April 2, 2007 Share Posted April 2, 2007 I've got an old knackered one kicking around. I keep meaning to cut the thing open to see it's gizzards and how it works. If I ever get around to it, I'll post up some pics. Link to comment Share on other sites More sharing options...
Jake Posted April 2, 2007 Share Posted April 2, 2007 I've done that, Tony. It's full of white goo and springs Link to comment Share on other sites More sharing options...
Guest Rab88 Posted April 3, 2007 Share Posted April 3, 2007 I got quoted £133 for a viscous fan from a toyota dealer... good quote? Link to comment Share on other sites More sharing options...
Kranz Posted April 3, 2007 Share Posted April 3, 2007 I got quoted £133 for a viscous fan from a toyota dealer... good quote? Anything from Mr T at that price is cheap Have you tried Nic????? Delivery would be weks though. Link to comment Share on other sites More sharing options...
Class One Posted April 3, 2007 Share Posted April 3, 2007 If you join (£10) then you'll have full access to the club and enjoy it's benefits of belonging. One of those is getting discounted parts from a Toyota dealer. It'll be the best tenner you've ever spent. Link to comment Share on other sites More sharing options...
Rob Posted April 4, 2007 Share Posted April 4, 2007 I've done that, Tony. It's full of white goo and springs Like a robotic penis? If you fancy the risk..... http://cgi.ebay.co.uk/TOYOTA-SUPRA-TWIN-TURBO-VISCIOUS-COUPLING-AND-FAN_W0QQitemZ180101551240QQcategoryZ10390QQrdZ1QQcmdZViewItem Link to comment Share on other sites More sharing options...
Guest Rab88 Posted April 6, 2007 Share Posted April 6, 2007 Just a thought.... As there's possibly a problem with the coolant, or there's an air lock, is it possible that the viscous fan has become deliberatly ceased (and keeping the engine too cool), as the car "thinks" it's going to overheat? If the coolant problem is fixed, might the fan become unceized? Suppose i'm just unsure if the car has the capability to cease the fan when it thinks it's going to overheat. Link to comment Share on other sites More sharing options...
Keith C Posted April 6, 2007 Share Posted April 6, 2007 With the engine off the fan should spin freely - if it doesn't, the viscous hub is knackered. Link to comment Share on other sites More sharing options...
TLicense Posted April 6, 2007 Share Posted April 6, 2007 Just a thought.... As there's possibly a problem with the coolant, or there's an air lock, is it possible that the viscous fan has become deliberatly ceased (and keeping the engine too cool), as the car "thinks" it's going to overheat? If the coolant problem is fixed, might the fan become unceized? Suppose i'm just unsure if the car has the capability to cease the fan when it thinks it's going to overheat. The fan locks up because the white goo that Jake spoke of, becomes turns more viscous. (or less, I can never remember if high viscosity is runny or thick? I keep getting told, but can never remember - anyway....) So it's a chemical reaction that the car doesn't really have much of say over. From your description, yours is knackered and is cooling the car all the time. If you change it, then you'll be able to see if there's still a problem with something else. Link to comment Share on other sites More sharing options...
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