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914World.com _ 914World Garage _ Red Heat lever
Posted by: mrholland2 Dec 6 2011, 08:04 PM
Exactly what does it do and how does it do it? In other words, when you move the lever, what does the lever, in turn, move? 
Thanks for your help
Sean
Posted by: srb7f Dec 6 2011, 08:13 PM
As you lift it up, it pulls cables which open the flapper valves between the heat exchangers and the passenger cabin to let air funneled around the exhaust pipes warm up and in turn keep you warm inside the car. The further you pull the red lever means the valves open up more. At about the halfway point, an additional electric fan in the engine compartment is kicked on to boost the volume of air already being sent through the pipes by the impeller fan attached to the crankshaft.
Posted by: mrholland2 Dec 6 2011, 08:16 PM
As you lift it up, it pulls cables which open the flapper valves between the heat exchangers and the passenger cabin to let air funneled around the exhaust pipes warm up and in turn keep you warm inside the car. The further you pull the red lever means the valves open up more. At about the halfway point, an additional electric fan in the engine compartment is kicked on to boost the volume of air already being sent through the pipes by the impeller fan attached to the crankshaft.
Are those flappers part of the body of the car? Or are they built into the heat exchangers?
Posted by: dlee6204 Dec 6 2011, 08:16 PM
The heat lever does two things...
1-When you pull it up all the way, it turns on the electric fan in the engine compartment which aids in pushing warm air to the cabin.
2- It is also attached to a cable that when pulled, opens heater valves underneath the car which allows warm air to enter the longitudinals and into the cabin.
Posted by: SirAndy Dec 6 2011, 09:02 PM
Neither. They clamp onto the heat exchangers and are connected to your longs with a hose.
Posted by: mrholland2 Dec 6 2011, 09:07 PM
Neither. They clamp onto the heat exchangers and are connected to your longs with a hose.
So, if there are no hoses at all, there are no flappers and the red lever is connected to nothing?
Also, I have no parking brake at all. (I'm trying to figure out how to do many things at once when I have a few days to work).
Thanks
Posted by: rick 918-S Dec 6 2011, 09:12 PM
Neither. They clamp onto the heat exchangers and are connected to your longs with a hose.
So, if there are no hoses at all, there are no flappers and the red lever is connected to nothing?
Also, I have no parking brake at all. (I'm trying to figure out how to do many things at once when I have a few days to work).
Thanks
Yep, sounds like your missing some parts.
Posted by: Tom_T Dec 7 2011, 12:16 AM
Neither. They clamp onto the heat exchangers and are connected to your longs with a hose.
So, if there are no hoses at all, there are no flappers and the red lever is connected to nothing?
Also, I have no parking brake at all. (I'm trying to figure out how to do many things at once when I have a few days to work).
Thanks
Flapper boxes are visible under the car at the L & R engine compartment near the fwd. firewall - the aux. heat fan is topside in the L engine compartment below the relay board, & - yes - you'll need the cables, power/wires & hoses/tubes all hooked up for heat to work.
Ditto for the E-brake!
Posted by: mrholland2 Dec 7 2011, 12:24 AM
Ditto for the E-brake!
I need to see a fully functional ebrake system. I can't even figure out where the stupid handle would mount. The heat I think I have a modification for, but I won't worry about it until next winter, I'll just shiver for now. . when I drive it, generally 12 miles highway each way.
Is the love for 914's totally irrational or what? LOL
Posted by: jcambo7 Dec 7 2011, 02:10 AM
Flapper boxes are visible under the car at the L & R engine compartment near the fwd. firewall - the aux. heat fan is topside in the L engine compartment below the relay board, & - yes - you'll need the cables, power/wires & hoses/tubes all hooked up for heat to work.
Ditto for the E-brake!
I need to see a fully functional ebrake system. I can't even figure out where the stupid handle would mount. The heat I think I have a modification for, but I won't worry about it until next winter, I'll just shiver for now. . when I drive it, generally 12 miles highway each way.
Is the love for 914's totally irrational or what? LOL
the e brake is on the left side of the driver seat bolted to the long.
Posted by: partwerks Dec 7 2011, 03:04 AM
As I recall that electric fan sucks in cold air on the back side of it and enters it into the system. Don't seem like it would be helping the situation out any?
Wonder if it would be too crazy of an idea to have some sort of hose on the back side of the fan that would be somehow be hooked into the heat exchangers and would at least circulate the warm air back in as opposed to outside cold air??
Posted by: dlee6204 Dec 7 2011, 10:49 AM
Wonder if it would be too crazy of an idea to have some sort of hose on the back side of the fan that would be somehow be hooked into the heat exchangers and would at least circulate the warm air back in as opposed to outside cold air??
For the heat... your main fan, the engine fan, is what supplies most of the air to the cabin. The Electric fan only helps a little when engine speeds are low. Both fans however suck up cool air and warms it via the exchangers. Simply looping the electric fan will have very little effect on the warm air going into the cabin since the majority of the air comes from the engine fan.
Posted by: SirAndy Dec 7 2011, 12:14 PM
Wrong fan!
There's two electrical fans in a 914.
- One is in the engine compartment and pushes air through the heat exchangers. It is switched on by the red heater lever on the floor.
- The other one is the front mounted fresh air fan which, true to its name, only pushes *fresh* air from the outside into the cabin.
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Posted by: type47 Dec 8 2011, 09:17 AM
Look at PET illustration 202-15 for exhaust and heater parts. (If you don't have a copy of the PET, see the link in my signature).
Posted by: bulitt Dec 8 2011, 09:53 AM
Look at PET illustration 202-15 for exhaust and heater parts. (If you don't have a copy of the PET, see the link in my signature).
Wow, awesome parts catalog!
Posted by: jtg Dec 8 2011, 12:40 PM
Ok, this is sorta off topic but you guys might get a laugh out of this. In my electric 914 there is no wasted engine heat so I mounted two blow dryers (donated by my wife) either side of the front air mixing box. Instant hot air whenever we need it! No waiting for the engine to heat up. The red heater knob was not being used so I hooked it up to my main circuit breaker (1000 amps!) that's in the engine compartment. It's used only in emergencies to cut all power to the motor. Using the heater lever kept all high voltage wires out of the passenger compartment. Sort of a James Bond ejector switch. The now unused head duct tunnels on either side of the car I used as a conduit for the high voltage wiring that went front to back. Too much fun....
Jim
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