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Viscous cabin heater and it's clutch
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? |
Re: Viscous cabin heater and it's clutch
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. |
Re: Viscous cabin heater and it's clutch
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. |
Re: Viscous cabin heater and it's clutch
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. |
Re: Viscous cabin heater and it's clutch
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. |
Re: Viscous cabin heater and it's clutch
stilllearning 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. > OK....... I'll bite...... 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. 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. Your 'heater' gets it's fluid from the waterpump bypassing the thermostat so the inside heater core sees warm fluid before the radiator sees warm fluid. If you want instant heat, you need to add a circulating block heater that uses a 'lot' of 120 volt power via an extension cord plugged into your house to preheat your engine so it doesn't freeze solid and is easier to start in sub zero weather. 2-3 hours at -20C is usually good enough for instant heat. 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, 10:51 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. > OK....... I'll bite...... 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. 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. Your 'heater' gets it's fluid from the waterpump bypassing the thermostat so the inside heater core sees warm fluid before the radiator sees warm fluid. If you want instant heat, you need to add a circulating block heater that uses a 'lot' of 120 volt power via an extension cord plugged into your house to preheat your engine so it doesn't freeze solid and is easier to start in sub zero weather. 2-3 hours at -20C is usually good enough for instant heat. 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, 10:51 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. > OK....... I'll bite...... 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. 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. Your 'heater' gets it's fluid from the waterpump bypassing the thermostat so the inside heater core sees warm fluid before the radiator sees warm fluid. If you want instant heat, you need to add a circulating block heater that uses a 'lot' of 120 volt power via an extension cord plugged into your house to preheat your engine so it doesn't freeze solid and is easier to start in sub zero weather. 2-3 hours at -20C is usually good enough for instant heat. 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, 10:51 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. > OK....... I'll bite...... 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. 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. Your 'heater' gets it's fluid from the waterpump bypassing the thermostat so the inside heater core sees warm fluid before the radiator sees warm fluid. If you want instant heat, you need to add a circulating block heater that uses a 'lot' of 120 volt power via an extension cord plugged into your house to preheat your engine so it doesn't freeze solid and is easier to start in sub zero weather. 2-3 hours at -20C is usually good enough for instant heat. 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
This post is incoherent to the point of surrealism.
Unless you use a 120 volt overnight block heater, there is no such thing as "instant" heat, and there is no "viscous heater". Saludos cordiales, Earle "stilllearning" <shahswim@yahoo.com> wrote in message news:1181746281.704135.6060@q19g2000prn.googlegrou ps.com... > 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? > -- Posted via a free Usenet account from http://www.teranews.com |
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