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Re: Re: Viscous cabin heater and it's clutch
On Wed, 13 Jun 2007 11:05:37 -0400, Mike Romain <romainm@sympatico.ca>
wrote: >The 'viscous' part of the fan is normally the part that causes the >'radiator' fan to freewheel when the engine is cold and to stiffen up >almost solid when the engine heats up so it sucks cold air to cool down >the radiator. I can see that you really do not know how these work either. It works on the theory of a silicone fluid between discs that transfer power via fluid between them due to shearing forces. The fluid is constantly pumped out of the "disc" area into a reservior so that is can free wheel, it starts to engage so to speak when the bi metal coil allows fluid to return to clutch area and when it is returned at a rate that exceeds the rate at wheich is it removed at it reaches it sate of least slippage. It is never a solid or even should be described as one. The fluid used has been choosen because of its shearing properties (as rate of shear increases, the power to shear it increases dramatically unlike motor oil) and for very high resistance to the tempatures generated by this shearing. It is a old and proven concept. The amount of torque this design can transfer it limited by the diameter and amount of clutches and the cooling for them because the shearing can generate a lot of heat. BTW, when fan engages it also improves A/C efficency and output (if you have one) as it cools the refrigerant more before it is expanded again which makes it cooler when it is expanded. When clutch fans first made their appearance in the 60's, they were mostly on cars with A/C on them and later were used on basically all cars by early to mid 70's or so A/C or not > >This is a 'gas saving' device apparently saving the gas needed to spin >the fan when the engine is not running hot. The fan does take several >HP to spin up under load. Yes it was designed as a gas saving device of sorts and also a way to allow for increased cooling capacity during times of need and reduce fan noise when it is is not needed. The only weakness of the design is too fold, first detriot tends to be conservative with the bi metal coil setting on some applications lets vehcile get pretty warm some times and the second is as the mi metal coil ages by nature it will increase engagement temp and make you think that your clutch fan is worn out when it may only need a adjustment. As long as the clutch does not wobble on shaft and fluid has not leaked out it is likely still good and may at most need a little tweaking to restore its operation. I have been tweaking them for many many years and if you want to know how you can find instructions in link below. http://forum.snoman.com/viewtopic.php?t=79 ----------------- TheSnoMan.com |
Re: Viscous cabin heater and it's clutch
The text is unreadable, but it looks like an air conditioning refrigerant
compressor. Saludos cordiales, Earle "stilllearning" <shahswim@yahoo.com> wrote in message news:1181753677.414884.69910@j4g2000prf.googlegrou ps.com... > On Jun 13, 10:52 am, stilllearning <shahs...@yahoo.com> wrote: > > On Jun 13, 10:51 am, stilllearning <shahs...@yahoo.com> wrote: > > > > > > > > > > > > > Where exactly is the viscous heater clutch located? Is it part of the > > > A/C clutch? > > > > > Where exactly is the viscous heater? > > > > > Trying to understand passenger cabin heating: > > > > > Normally the coolant heats the cabin, but that happens only after the > > > coolant heats up (maybe a few minutes after a engine start) and the > > > thermostat opens up to send fluid to the radiator. > > > > > The viscous heater heats the cabin immediately after engine start and > > > until the coolant is hot. > > > > > Why then, in cold weather, if the heater knob is set to high, the > > > cabin is heated only after a few minutes? Shouldn't the viscous heater > > > heat the cabin immediately? > > > > Jeep WJ 2004, I6, 4WD.- Hide quoted text - > > > > - Show quoted text - > > Seems the viscous heater is esoteric enough that googling "viscous > heater clutch" returns no entries! More information on the viscous > heater clutch; here are three relevant pages from the factory service > manual: > > http://new.photos.yahoo.com/shahswim...60762403547730 > > -- Posted via a free Usenet account from http://www.teranews.com |
Re: Viscous cabin heater and it's clutch
The text is unreadable, but it looks like an air conditioning refrigerant
compressor. Saludos cordiales, Earle "stilllearning" <shahswim@yahoo.com> wrote in message news:1181753677.414884.69910@j4g2000prf.googlegrou ps.com... > On Jun 13, 10:52 am, stilllearning <shahs...@yahoo.com> wrote: > > On Jun 13, 10:51 am, stilllearning <shahs...@yahoo.com> wrote: > > > > > > > > > > > > > Where exactly is the viscous heater clutch located? Is it part of the > > > A/C clutch? > > > > > Where exactly is the viscous heater? > > > > > Trying to understand passenger cabin heating: > > > > > Normally the coolant heats the cabin, but that happens only after the > > > coolant heats up (maybe a few minutes after a engine start) and the > > > thermostat opens up to send fluid to the radiator. > > > > > The viscous heater heats the cabin immediately after engine start and > > > until the coolant is hot. > > > > > Why then, in cold weather, if the heater knob is set to high, the > > > cabin is heated only after a few minutes? Shouldn't the viscous heater > > > heat the cabin immediately? > > > > Jeep WJ 2004, I6, 4WD.- Hide quoted text - > > > > - Show quoted text - > > Seems the viscous heater is esoteric enough that googling "viscous > heater clutch" returns no entries! More information on the viscous > heater clutch; here are three relevant pages from the factory service > manual: > > http://new.photos.yahoo.com/shahswim...60762403547730 > > -- Posted via a free Usenet account from http://www.teranews.com |
Re: Viscous cabin heater and it's clutch
The text is unreadable, but it looks like an air conditioning refrigerant
compressor. Saludos cordiales, Earle "stilllearning" <shahswim@yahoo.com> wrote in message news:1181753677.414884.69910@j4g2000prf.googlegrou ps.com... > On Jun 13, 10:52 am, stilllearning <shahs...@yahoo.com> wrote: > > On Jun 13, 10:51 am, stilllearning <shahs...@yahoo.com> wrote: > > > > > > > > > > > > > Where exactly is the viscous heater clutch located? Is it part of the > > > A/C clutch? > > > > > Where exactly is the viscous heater? > > > > > Trying to understand passenger cabin heating: > > > > > Normally the coolant heats the cabin, but that happens only after the > > > coolant heats up (maybe a few minutes after a engine start) and the > > > thermostat opens up to send fluid to the radiator. > > > > > The viscous heater heats the cabin immediately after engine start and > > > until the coolant is hot. > > > > > Why then, in cold weather, if the heater knob is set to high, the > > > cabin is heated only after a few minutes? Shouldn't the viscous heater > > > heat the cabin immediately? > > > > Jeep WJ 2004, I6, 4WD.- Hide quoted text - > > > > - Show quoted text - > > Seems the viscous heater is esoteric enough that googling "viscous > heater clutch" returns no entries! More information on the viscous > heater clutch; here are three relevant pages from the factory service > manual: > > http://new.photos.yahoo.com/shahswim...60762403547730 > > -- Posted via a free Usenet account from http://www.teranews.com |
Re: Viscous cabin heater and it's clutch
The text is unreadable, but it looks like an air conditioning refrigerant
compressor. Saludos cordiales, Earle "stilllearning" <shahswim@yahoo.com> wrote in message news:1181753677.414884.69910@j4g2000prf.googlegrou ps.com... > On Jun 13, 10:52 am, stilllearning <shahs...@yahoo.com> wrote: > > On Jun 13, 10:51 am, stilllearning <shahs...@yahoo.com> wrote: > > > > > > > > > > > > > Where exactly is the viscous heater clutch located? Is it part of the > > > A/C clutch? > > > > > Where exactly is the viscous heater? > > > > > Trying to understand passenger cabin heating: > > > > > Normally the coolant heats the cabin, but that happens only after the > > > coolant heats up (maybe a few minutes after a engine start) and the > > > thermostat opens up to send fluid to the radiator. > > > > > The viscous heater heats the cabin immediately after engine start and > > > until the coolant is hot. > > > > > Why then, in cold weather, if the heater knob is set to high, the > > > cabin is heated only after a few minutes? Shouldn't the viscous heater > > > heat the cabin immediately? > > > > Jeep WJ 2004, I6, 4WD.- Hide quoted text - > > > > - Show quoted text - > > Seems the viscous heater is esoteric enough that googling "viscous > heater clutch" returns no entries! More information on the viscous > heater clutch; here are three relevant pages from the factory service > manual: > > http://new.photos.yahoo.com/shahswim...60762403547730 > > -- Posted via a free Usenet account from http://www.teranews.com |
Re: Viscous cabin heater and it's clutch, Now SnoMan the stalker.
SnoMan wrote:
> On Wed, 13 Jun 2007 11:05:37 -0400, Mike Romain <romainm@sympatico.ca> > wrote: > >> The 'viscous' part of the fan is normally the part that causes the >> 'radiator' fan to freewheel when the engine is cold and to stiffen up >> almost solid when the engine heats up so it sucks cold air to cool down >> the radiator. > > I can see that you really do not know how these work either. Once again you have absolutely no clue what you are talking about and are too stunned to realize it. Stalking me only proves you are a total idiot! You have proven beyond any doubt to be a lying Idiot stalker that gives out advice on a regular basis that will 'kill' people. Stalking me will 'only' cause you grief and harassment foole. Once again, Screw off eh. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: Viscous cabin heater and it's clutch, Now SnoMan the stalker.
SnoMan wrote:
> On Wed, 13 Jun 2007 11:05:37 -0400, Mike Romain <romainm@sympatico.ca> > wrote: > >> The 'viscous' part of the fan is normally the part that causes the >> 'radiator' fan to freewheel when the engine is cold and to stiffen up >> almost solid when the engine heats up so it sucks cold air to cool down >> the radiator. > > I can see that you really do not know how these work either. Once again you have absolutely no clue what you are talking about and are too stunned to realize it. Stalking me only proves you are a total idiot! You have proven beyond any doubt to be a lying Idiot stalker that gives out advice on a regular basis that will 'kill' people. Stalking me will 'only' cause you grief and harassment foole. Once again, Screw off eh. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: Viscous cabin heater and it's clutch, Now SnoMan the stalker.
SnoMan wrote:
> On Wed, 13 Jun 2007 11:05:37 -0400, Mike Romain <romainm@sympatico.ca> > wrote: > >> The 'viscous' part of the fan is normally the part that causes the >> 'radiator' fan to freewheel when the engine is cold and to stiffen up >> almost solid when the engine heats up so it sucks cold air to cool down >> the radiator. > > I can see that you really do not know how these work either. Once again you have absolutely no clue what you are talking about and are too stunned to realize it. Stalking me only proves you are a total idiot! You have proven beyond any doubt to be a lying Idiot stalker that gives out advice on a regular basis that will 'kill' people. Stalking me will 'only' cause you grief and harassment foole. Once again, Screw off eh. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: Viscous cabin heater and it's clutch, Now SnoMan the stalker.
SnoMan wrote:
> On Wed, 13 Jun 2007 11:05:37 -0400, Mike Romain <romainm@sympatico.ca> > wrote: > >> The 'viscous' part of the fan is normally the part that causes the >> 'radiator' fan to freewheel when the engine is cold and to stiffen up >> almost solid when the engine heats up so it sucks cold air to cool down >> the radiator. > > I can see that you really do not know how these work either. Once again you have absolutely no clue what you are talking about and are too stunned to realize it. Stalking me only proves you are a total idiot! You have proven beyond any doubt to be a lying Idiot stalker that gives out advice on a regular basis that will 'kill' people. Stalking me will 'only' cause you grief and harassment foole. Once again, Screw off eh. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
Re: Viscous cabin heater and it's clutch
stilllearning wrote:
> On Jun 13, 10:52 am, stilllearning <shahs...@yahoo.com> wrote: >> On Jun 13, 10:51 am, stilllearning <shahs...@yahoo.com> wrote: >> >> >> >> >> >>> Where exactly is the viscous heater clutch located? Is it part of the >>> A/C clutch? >>> Where exactly is the viscous heater? >>> Trying to understand passenger cabin heating: >>> Normally the coolant heats the cabin, but that happens only after the >>> coolant heats up (maybe a few minutes after a engine start) and the >>> thermostat opens up to send fluid to the radiator. >>> The viscous heater heats the cabin immediately after engine start and >>> until the coolant is hot. >>> Why then, in cold weather, if the heater knob is set to high, the >>> cabin is heated only after a few minutes? Shouldn't the viscous heater >>> heat the cabin immediately? >> Jeep WJ 2004, I6, 4WD.- Hide quoted text - >> >> - Show quoted text - > > Seems the viscous heater is esoteric enough that googling "viscous > heater clutch" returns no entries! More information on the viscous > heater clutch; here are three relevant pages from the factory service > manual: > > http://new.photos.yahoo.com/shahswim...60762403547730 > > Neat, that's a totally new toy to break down. I can't say as I really would want one, but it is neat to have an actual fluid heater for the coolant. I wonder how many HP it eats up with it's friction drive? Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) |
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