80datson Posted February 17, 2011 Report Share Posted February 17, 2011 ive notived that theres this tube that sicks out of the air box or wha cha ma call it :P well anyways i also noticed that thers a hole in the exaust mani looks like that tube goes there but not sure.. what do yu guys think? Quote Link to comment
80datson Posted February 17, 2011 Author Report Share Posted February 17, 2011 hot air return tube? Quote Link to comment
ariascarlos1990 Posted February 17, 2011 Report Share Posted February 17, 2011 its for emissions and yes it connects to your exhaust. Quote Link to comment
80datson Posted February 17, 2011 Author Report Share Posted February 17, 2011 ok so i shud connect that. it shouldbt be out like that right and it shud be going stright down to that hole in the exaust sorry im just making sure its my ocd :P Quote Link to comment
DanielC Posted February 17, 2011 Report Share Posted February 17, 2011 It pulls warm air off the outside of the exhaust manifold. If you live in Long Beach, California, probably not necessary. If you live in Long Beach, Washington, you probably need it hooked up in the winter, it will make your car run better. I have actually had the carburettor ice up on a Datsun 521 driving in the winter. Quote Link to comment
datzenmike Posted February 17, 2011 Report Share Posted February 17, 2011 On a GM it's called a stove pipe and brings air warmed by the hot exhaust to the air cleaner snorkel. On a cold engine it helps the carb to vaporize the fuel easier. In damp weather near zero (fog,sleet,freezing rain) it prevents frost from forming on the carb venturi. (carb icing) There is a vacuum operated thermostatic valve in the snorkel that senses air below 85F and opens to allow warmed air. Under heavy throttle the low vacuum will close the valve and run cool air for better performance. Any temp between 85F and 130F the valve is partly open and above 130F it is closed. Operating properly the motor warms quicker, runs smoother, gives better mileage over a wider range of temperature ranges. Quote Link to comment
metalmonkey47 Posted February 17, 2011 Report Share Posted February 17, 2011 It's called a heat riser. It's not really mandatory, but in cold weather it helps with operation of the engine by pulling hot air from the exhaust manifold and feeding it up to the intake to a valve that is vacuum controlled and is open when the engine is cold, to allow the warmer air into the intake. Quote Link to comment
ggzilla Posted February 17, 2011 Report Share Posted February 17, 2011 This one is called the stove heat or warm-air intake. Heat Riser is inside the exhaust manifold. Also called a "stove". Quote Link to comment
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.