Joe

Since we're kind of on the topic, what's the difference between "heat" and
"vent" in a CJ7? I get "heat" from both.

"Roy J" <spamless@microsoft.net> wrote in message
news:k7wBb.1420$Bd3.71750@news.uswest.net...
> It gets colder here than where you are. -40F is the same as -40C
> And you still have 195 degree water no matter what if the
> thermostat is working. I will agree that if you have the heater
> blowing full blast, that may be enough to cool the engine until
> the cab warms up or maybe it never comes up to temp if you are
> sucking outside air.
>
> I still wish the newer FI engines had a proper engine heating
> like my '68 Olds V-8 had: Dual exhaust had a thermostat in one
> pipe, shut that one pipe off and directed half the exhaust
> thorugh the intake manifold. Add in the heated intake and I could
> get regular gas mileage at -30F on the highway. (Which wasn't
> great but it would go to 5 mpg in really cold weather.
>
> cheers.
>
> Mike Romain wrote:
> > I wish.
> >
> > It don't work like that up here in the Great White North.
> >
> > The t-stat will stay closed or 'just' crack open in the real cold.
> > Blocking the rad will let it heat up enough to open the t-stat and
> > actually have 195 deg coolant flowing.
> >
> > Otherwise it is only very luke warm.
> >
> > The t-stat opens a bit and the hot coolant hits -40 in the rad and shuts
> > down the t-stat real quick.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Roy J wrote:
> >
> >>If your thermostat is working properly, the radiator is shut off
> >>anyway. If your aren't getting enough heat, you need to do the
> >>heat drill:
> >>-flush and refill cooling system
> >>-rebuild heater core
> >>-new thermostat
> >>-does the Cherokee have the small or big fan motor? It shares a
> >>lot of parts with the Wrangler of that vintage
> >>
> >>Cheers.
> >>
> >>Kyonn Gowans wrote:
> >>
> >>>>I used to cut an appropriate sized piece of cardboard and stuffed it
> >>>
> >>>between
> >>>
> >>>
> >>>>the grill and the radiator. But that was I was poor(er).
> >>>>- Jeff
> >>>
> >>>
> >>>Yeah I've seen people do that, but I'm trying to avoid it if I can. I
need
> >>>to do something cause it just takes my car way to long to warm up in
the
> >>>dead of winter.
> >>>
> >>>
> >>>
> >>>
>

Joe

Since we're kind of on the topic, what's the difference between "heat" and
"vent" in a CJ7? I get "heat" from both.

"Roy J" <spamless@microsoft.net> wrote in message
news:k7wBb.1420$Bd3.71750@news.uswest.net...
> It gets colder here than where you are. -40F is the same as -40C
> And you still have 195 degree water no matter what if the
> thermostat is working. I will agree that if you have the heater
> blowing full blast, that may be enough to cool the engine until
> the cab warms up or maybe it never comes up to temp if you are
> sucking outside air.
>
> I still wish the newer FI engines had a proper engine heating
> like my '68 Olds V-8 had: Dual exhaust had a thermostat in one
> pipe, shut that one pipe off and directed half the exhaust
> thorugh the intake manifold. Add in the heated intake and I could
> get regular gas mileage at -30F on the highway. (Which wasn't
> great but it would go to 5 mpg in really cold weather.
>
> cheers.
>
> Mike Romain wrote:
> > I wish.
> >
> > It don't work like that up here in the Great White North.
> >
> > The t-stat will stay closed or 'just' crack open in the real cold.
> > Blocking the rad will let it heat up enough to open the t-stat and
> > actually have 195 deg coolant flowing.
> >
> > Otherwise it is only very luke warm.
> >
> > The t-stat opens a bit and the hot coolant hits -40 in the rad and shuts
> > down the t-stat real quick.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Roy J wrote:
> >
> >>If your thermostat is working properly, the radiator is shut off
> >>anyway. If your aren't getting enough heat, you need to do the
> >>heat drill:
> >>-flush and refill cooling system
> >>-rebuild heater core
> >>-new thermostat
> >>-does the Cherokee have the small or big fan motor? It shares a
> >>lot of parts with the Wrangler of that vintage
> >>
> >>Cheers.
> >>
> >>Kyonn Gowans wrote:
> >>
> >>>>I used to cut an appropriate sized piece of cardboard and stuffed it
> >>>
> >>>between
> >>>
> >>>
> >>>>the grill and the radiator. But that was I was poor(er).
> >>>>- Jeff
> >>>
> >>>
> >>>Yeah I've seen people do that, but I'm trying to avoid it if I can. I
need
> >>>to do something cause it just takes my car way to long to warm up in
the
> >>>dead of winter.
> >>>
> >>>
> >>>
> >>>
>

Joe

Since we're kind of on the topic, what's the difference between "heat" and
"vent" in a CJ7? I get "heat" from both.

"Roy J" <spamless@microsoft.net> wrote in message
news:k7wBb.1420$Bd3.71750@news.uswest.net...
> It gets colder here than where you are. -40F is the same as -40C
> And you still have 195 degree water no matter what if the
> thermostat is working. I will agree that if you have the heater
> blowing full blast, that may be enough to cool the engine until
> the cab warms up or maybe it never comes up to temp if you are
> sucking outside air.
>
> I still wish the newer FI engines had a proper engine heating
> like my '68 Olds V-8 had: Dual exhaust had a thermostat in one
> pipe, shut that one pipe off and directed half the exhaust
> thorugh the intake manifold. Add in the heated intake and I could
> get regular gas mileage at -30F on the highway. (Which wasn't
> great but it would go to 5 mpg in really cold weather.
>
> cheers.
>
> Mike Romain wrote:
> > I wish.
> >
> > It don't work like that up here in the Great White North.
> >
> > The t-stat will stay closed or 'just' crack open in the real cold.
> > Blocking the rad will let it heat up enough to open the t-stat and
> > actually have 195 deg coolant flowing.
> >
> > Otherwise it is only very luke warm.
> >
> > The t-stat opens a bit and the hot coolant hits -40 in the rad and shuts
> > down the t-stat real quick.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Roy J wrote:
> >
> >>If your thermostat is working properly, the radiator is shut off
> >>anyway. If your aren't getting enough heat, you need to do the
> >>heat drill:
> >>-flush and refill cooling system
> >>-rebuild heater core
> >>-new thermostat
> >>-does the Cherokee have the small or big fan motor? It shares a
> >>lot of parts with the Wrangler of that vintage
> >>
> >>Cheers.
> >>
> >>Kyonn Gowans wrote:
> >>
> >>>>I used to cut an appropriate sized piece of cardboard and stuffed it
> >>>
> >>>between
> >>>
> >>>
> >>>>the grill and the radiator. But that was I was poor(er).
> >>>>- Jeff
> >>>
> >>>
> >>>Yeah I've seen people do that, but I'm trying to avoid it if I can. I
need
> >>>to do something cause it just takes my car way to long to warm up in
the
> >>>dead of winter.
> >>>
> >>>
> >>>
> >>>
>

Mike Romain

That's the big problem at -40, the engine won't hold 195. As soon as
the t-stat opens, the sucker gets flash frozen or flash cooled and takes
a long time to get back to 195....

Mike

Roy J wrote:
>
> It gets colder here than where you are. -40F is the same as -40C
> And you still have 195 degree water no matter what if the
> thermostat is working. I will agree that if you have the heater
> blowing full blast, that may be enough to cool the engine until
> the cab warms up or maybe it never comes up to temp if you are
> sucking outside air.
>
> I still wish the newer FI engines had a proper engine heating
> like my '68 Olds V-8 had: Dual exhaust had a thermostat in one
> pipe, shut that one pipe off and directed half the exhaust
> thorugh the intake manifold. Add in the heated intake and I could
> get regular gas mileage at -30F on the highway. (Which wasn't
> great but it would go to 5 mpg in really cold weather.
>
> cheers.
>
> Mike Romain wrote:
> > I wish.
> >
> > It don't work like that up here in the Great White North.
> >
> > The t-stat will stay closed or 'just' crack open in the real cold.
> > Blocking the rad will let it heat up enough to open the t-stat and
> > actually have 195 deg coolant flowing.
> >
> > Otherwise it is only very luke warm.
> >
> > The t-stat opens a bit and the hot coolant hits -40 in the rad and shuts
> > down the t-stat real quick.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Roy J wrote:
> >
> >>If your thermostat is working properly, the radiator is shut off
> >>anyway. If your aren't getting enough heat, you need to do the
> >>heat drill:
> >>-flush and refill cooling system
> >>-rebuild heater core
> >>-new thermostat
> >>-does the Cherokee have the small or big fan motor? It shares a
> >>lot of parts with the Wrangler of that vintage
> >>
> >>Cheers.
> >>
> >>Kyonn Gowans wrote:
> >>
> >>>>I used to cut an appropriate sized piece of cardboard and stuffed it
> >>>
> >>>between
> >>>
> >>>
> >>>>the grill and the radiator. But that was I was poor(er).
> >>>>- Jeff
> >>>
> >>>
> >>>Yeah I've seen people do that, but I'm trying to avoid it if I can. I need
> >>>to do something cause it just takes my car way to long to warm up in the
> >>>dead of winter.
> >>>
> >>>
> >>>
> >>>

Mike Romain

That's the big problem at -40, the engine won't hold 195. As soon as
the t-stat opens, the sucker gets flash frozen or flash cooled and takes
a long time to get back to 195....

Mike

Roy J wrote:
>
> It gets colder here than where you are. -40F is the same as -40C
> And you still have 195 degree water no matter what if the
> thermostat is working. I will agree that if you have the heater
> blowing full blast, that may be enough to cool the engine until
> the cab warms up or maybe it never comes up to temp if you are
> sucking outside air.
>
> I still wish the newer FI engines had a proper engine heating
> like my '68 Olds V-8 had: Dual exhaust had a thermostat in one
> pipe, shut that one pipe off and directed half the exhaust
> thorugh the intake manifold. Add in the heated intake and I could
> get regular gas mileage at -30F on the highway. (Which wasn't
> great but it would go to 5 mpg in really cold weather.
>
> cheers.
>
> Mike Romain wrote:
> > I wish.
> >
> > It don't work like that up here in the Great White North.
> >
> > The t-stat will stay closed or 'just' crack open in the real cold.
> > Blocking the rad will let it heat up enough to open the t-stat and
> > actually have 195 deg coolant flowing.
> >
> > Otherwise it is only very luke warm.
> >
> > The t-stat opens a bit and the hot coolant hits -40 in the rad and shuts
> > down the t-stat real quick.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Roy J wrote:
> >
> >>If your thermostat is working properly, the radiator is shut off
> >>anyway. If your aren't getting enough heat, you need to do the
> >>heat drill:
> >>-flush and refill cooling system
> >>-rebuild heater core
> >>-new thermostat
> >>-does the Cherokee have the small or big fan motor? It shares a
> >>lot of parts with the Wrangler of that vintage
> >>
> >>Cheers.
> >>
> >>Kyonn Gowans wrote:
> >>
> >>>>I used to cut an appropriate sized piece of cardboard and stuffed it
> >>>
> >>>between
> >>>
> >>>
> >>>>the grill and the radiator. But that was I was poor(er).
> >>>>- Jeff
> >>>
> >>>
> >>>Yeah I've seen people do that, but I'm trying to avoid it if I can. I need
> >>>to do something cause it just takes my car way to long to warm up in the
> >>>dead of winter.
> >>>
> >>>
> >>>
> >>>

Mike Romain

That's the big problem at -40, the engine won't hold 195. As soon as
the t-stat opens, the sucker gets flash frozen or flash cooled and takes
a long time to get back to 195....

Mike

Roy J wrote:
>
> It gets colder here than where you are. -40F is the same as -40C
> And you still have 195 degree water no matter what if the
> thermostat is working. I will agree that if you have the heater
> blowing full blast, that may be enough to cool the engine until
> the cab warms up or maybe it never comes up to temp if you are
> sucking outside air.
>
> I still wish the newer FI engines had a proper engine heating
> like my '68 Olds V-8 had: Dual exhaust had a thermostat in one
> pipe, shut that one pipe off and directed half the exhaust
> thorugh the intake manifold. Add in the heated intake and I could
> get regular gas mileage at -30F on the highway. (Which wasn't
> great but it would go to 5 mpg in really cold weather.
>
> cheers.
>
> Mike Romain wrote:
> > I wish.
> >
> > It don't work like that up here in the Great White North.
> >
> > The t-stat will stay closed or 'just' crack open in the real cold.
> > Blocking the rad will let it heat up enough to open the t-stat and
> > actually have 195 deg coolant flowing.
> >
> > Otherwise it is only very luke warm.
> >
> > The t-stat opens a bit and the hot coolant hits -40 in the rad and shuts
> > down the t-stat real quick.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Roy J wrote:
> >
> >>If your thermostat is working properly, the radiator is shut off
> >>anyway. If your aren't getting enough heat, you need to do the
> >>heat drill:
> >>-flush and refill cooling system
> >>-rebuild heater core
> >>-new thermostat
> >>-does the Cherokee have the small or big fan motor? It shares a
> >>lot of parts with the Wrangler of that vintage
> >>
> >>Cheers.
> >>
> >>Kyonn Gowans wrote:
> >>
> >>>>I used to cut an appropriate sized piece of cardboard and stuffed it
> >>>
> >>>between
> >>>
> >>>
> >>>>the grill and the radiator. But that was I was poor(er).
> >>>>- Jeff
> >>>
> >>>
> >>>Yeah I've seen people do that, but I'm trying to avoid it if I can. I need
> >>>to do something cause it just takes my car way to long to warm up in the
> >>>dead of winter.
> >>>
> >>>
> >>>
> >>>

Mike Romain

DougW wrote:
>
> Roy J did pass the time by typing:
> > It gets colder here than where you are. -40F is the same as -40C
> > And you still have 195 degree water no matter what if the
> > thermostat is working. I will agree that if you have the heater
> > blowing full blast, that may be enough to cool the engine until
> > the cab warms up or maybe it never comes up to temp if you are
> > sucking outside air.
> >
> > I still wish the newer FI engines had a proper engine heating
> > like my '68 Olds V-8 had: Dual exhaust had a thermostat in one
> > pipe, shut that one pipe off and directed half the exhaust
> > thorugh the intake manifold. Add in the heated intake and I could
> > get regular gas mileage at -30F on the highway. (Which wasn't
> > great but it would go to 5 mpg in really cold weather.
>
> Usually put on a different intake on the old Chevy just for winter
> that took air from under the hood rather than ducting it from the
> front.
>
> Usually that pipe just sucks the intake air around the exhaust
> header, doesn't actually take in exhaust. In real cold climates
> you may even see heater lines running to the intake. And I'm talking
> REAL cold. breathcicle cold.
>
> Just thinking of that makes me want hot chocolate.
>
> brr.
>
> --

That is only for the carb or throttle body...

The I6's have it too.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Mike Romain

DougW wrote:
>
> Roy J did pass the time by typing:
> > It gets colder here than where you are. -40F is the same as -40C
> > And you still have 195 degree water no matter what if the
> > thermostat is working. I will agree that if you have the heater
> > blowing full blast, that may be enough to cool the engine until
> > the cab warms up or maybe it never comes up to temp if you are
> > sucking outside air.
> >
> > I still wish the newer FI engines had a proper engine heating
> > like my '68 Olds V-8 had: Dual exhaust had a thermostat in one
> > pipe, shut that one pipe off and directed half the exhaust
> > thorugh the intake manifold. Add in the heated intake and I could
> > get regular gas mileage at -30F on the highway. (Which wasn't
> > great but it would go to 5 mpg in really cold weather.
>
> Usually put on a different intake on the old Chevy just for winter
> that took air from under the hood rather than ducting it from the
> front.
>
> Usually that pipe just sucks the intake air around the exhaust
> header, doesn't actually take in exhaust. In real cold climates
> you may even see heater lines running to the intake. And I'm talking
> REAL cold. breathcicle cold.
>
> Just thinking of that makes me want hot chocolate.
>
> brr.
>
> --

That is only for the carb or throttle body...

The I6's have it too.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Mike Romain

DougW wrote:
>
> Roy J did pass the time by typing:
> > It gets colder here than where you are. -40F is the same as -40C
> > And you still have 195 degree water no matter what if the
> > thermostat is working. I will agree that if you have the heater
> > blowing full blast, that may be enough to cool the engine until
> > the cab warms up or maybe it never comes up to temp if you are
> > sucking outside air.
> >
> > I still wish the newer FI engines had a proper engine heating
> > like my '68 Olds V-8 had: Dual exhaust had a thermostat in one
> > pipe, shut that one pipe off and directed half the exhaust
> > thorugh the intake manifold. Add in the heated intake and I could
> > get regular gas mileage at -30F on the highway. (Which wasn't
> > great but it would go to 5 mpg in really cold weather.
>
> Usually put on a different intake on the old Chevy just for winter
> that took air from under the hood rather than ducting it from the
> front.
>
> Usually that pipe just sucks the intake air around the exhaust
> header, doesn't actually take in exhaust. In real cold climates
> you may even see heater lines running to the intake. And I'm talking
> REAL cold. breathcicle cold.
>
> Just thinking of that makes me want hot chocolate.
>
> brr.
>
> --

That is only for the carb or throttle body...

The I6's have it too.

Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
88 Cherokee 235 BFG AT's

Mike Romain

Roy, your computer clock is way off!

Mike

Roy J wrote:
>
> It gets colder here than where you are. -40F is the same as -40C
> And you still have 195 degree water no matter what if the
> thermostat is working. I will agree that if you have the heater
> blowing full blast, that may be enough to cool the engine until
> the cab warms up or maybe it never comes up to temp if you are
> sucking outside air.
>
> I still wish the newer FI engines had a proper engine heating
> like my '68 Olds V-8 had: Dual exhaust had a thermostat in one
> pipe, shut that one pipe off and directed half the exhaust
> thorugh the intake manifold. Add in the heated intake and I could
> get regular gas mileage at -30F on the highway. (Which wasn't
> great but it would go to 5 mpg in really cold weather.
>
> cheers.
>
> Mike Romain wrote:
> > I wish.
> >
> > It don't work like that up here in the Great White North.
> >
> > The t-stat will stay closed or 'just' crack open in the real cold.
> > Blocking the rad will let it heat up enough to open the t-stat and
> > actually have 195 deg coolant flowing.
> >
> > Otherwise it is only very luke warm.
> >
> > The t-stat opens a bit and the hot coolant hits -40 in the rad and shuts
> > down the t-stat real quick.
> >
> > Mike
> > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00
> > 88 Cherokee 235 BFG AT's
> >
> > Roy J wrote:
> >
> >>If your thermostat is working properly, the radiator is shut off
> >>anyway. If your aren't getting enough heat, you need to do the
> >>heat drill:
> >>-flush and refill cooling system
> >>-rebuild heater core
> >>-new thermostat
> >>-does the Cherokee have the small or big fan motor? It shares a
> >>lot of parts with the Wrangler of that vintage
> >>
> >>Cheers.
> >>
> >>Kyonn Gowans wrote:
> >>
> >>>>I used to cut an appropriate sized piece of cardboard and stuffed it
> >>>
> >>>between
> >>>
> >>>
> >>>>the grill and the radiator. But that was I was poor(er).
> >>>>- Jeff
> >>>
> >>>
> >>>Yeah I've seen people do that, but I'm trying to avoid it if I can. I need
> >>>to do something cause it just takes my car way to long to warm up in the
> >>>dead of winter.
> >>>
> >>>
> >>>
> >>>