76 Eldorado- What is the name for carburetor part

[LenInLA]

What is the proper name of the hose in the photo? It's incredibly brittle and is just asking to be replaced. Thanks!

Leonard Grayver

[The Tassie Devil(le)]

It is called simply a Heat Tube.

The first thing I did with my car was to remove the tube, as I always try to keep the air intake in my engines as cold as possible.   

Bruce.

[LenInLA]

Bruce - you removed it altogether? What was its intended purpose?

Leonard Grayver

[Bobby B]

Bruce - you removed it altogether? What was its intended purpose?
Leonard Grayver

I think it's about 100 degrees every day in the Land Down Under. Serves no purpose for him..
                                                                                                                 Bobby

[Scot Minesinger]

This air duct (heat tube) draws combustion air across the exhaust manifold instead of from the intake at front of car connected to snorkel with plastic flex duct.  There is a snorkel damper that directs either from front of car or across exhaust manifold.  The reason for this is faster warm up.  This is controlled by a snorkel damper vacuum actuator that is triggered by a temperature sensor.  Sometimes the sensor is bad an allows vacuum to pass thru it and then even when car is warmed up combustion air is drawn across the exhaust manifold, which may cause hot running or overheating.  I disconnected the vacuum hose from sensor and plugged, so it stays in the already warmed up mode.  Bruce's method is more sure fire. 

In any event this may be helpful when car is driven in extreme cold weather, but mine always warms up quick in the weather I drive my 1970 Cadillac in.

It will not hurt your car if the tube is removed, but it could if the combustion air is inadvertently drawn across exhaust manifold for extended periods during warm weather.  I would deactivate this feature in one way or another.

[The Tassie Devil(le)]

I think it's about 100 degrees every day in the Land Down Under. Serves no purpose for him..
Bobby

Thankfully it is not, but when it does reach these temperatures, it is too hot.   But, with the depleted Ozone Layer any time out in the sunlight is extreme heat, especially when not wearing a hat or sunscreen.

Down here in Tasmania, even the Queenslanders complain about the heat of the sun.

Bruce.

[76eldo]

I've seen hose like that for sale in auto parts stores.
Joe Caristo is the best I've ever seen for detailing the engine compartment in 70's Eldo's. He probably knows where to get that hose and will see this post.

Brian

[TJ Hopland]

The parts store ones are a aluminum tube.  I think the originals were almost a coated paper sort of thing.  Seems like there are people selling the original style if that is important. 

I'm with the rest...  only slightly useful for extreme cold like below freezing.    Most of the time what I see on these is they just are not hooked up because the last person to have the air cleaner housing off forgot.

[Bobby B]

The parts store ones are a aluminum tube.  I think the originals were almost a coated paper sort of thing.  Seems like there are people selling the original style if that is important. 

TJ,
Hi. The cardboard style ones are still available. They come in different lengths and diameters. If you ask, they'll order it for you in your local parts store. They also look better. The aluminum ones look too much like a (now illegal) dryer vent hose. 
                                          Bobby

[Jakes]

Len.. GM calls it "Stove to Air Cleaner Duct".  I've also seen it called "Pre-heat Stove to Air Cleaner Duct" and also "Fuel Pre-heater Hose".  I replaced my brittle one with the typical "tight-accordian" aluminum one that I got on Amazon, but they're readily available in auto parts stores; just be sure it fits the year and model of your car (diameter and length).  If you use the aluminum type, be sure to flare or bend out the opening a little that fits on the "stove" above the exhaust manifold because it's a snug fit.  The opposite opening that attaches to the air cleaner elbow is no problem.