Purpose of Heat Risers - The 1947 - Present Chevrolet & GMC Truck Message Board Network

avejoe · 02-10-2004, 09:47 PM

What is the purpose of the heat risers that are located where the exhaust pipe attaches to the manifold?

Mine are missing. Is this a problem?

casey · 02-10-2004, 09:56 PM

if I'm not mistaken, there usually on one side and it restricts the exhaust when the vehicle is cold, and the exhaust runs through the intake manifold over to the other exhaust manifold instead to help warn it up, I stand to be corrected

69 air cab · 02-10-2004, 09:56 PM

Great question avejoe.........I have the same problem. I am looking for one.

Kenneth Brown · 02-10-2004, 09:56 PM

Not in calipornia its not. When the engine is cold the riser will close some so as to retain more heat in the motor. Its not a problem in a warm climate.

*rage'nrat638* · 02-10-2004, 09:59 PM

my header's don't have that

jorgensensc · 02-10-2004, 10:01 PM

I took out the innards of the heat risers on my old '80,'82,'83,and'85. Your truck will eventually warm up.

Bowtie67 · 02-10-2004, 10:11 PM

Adding weight, making noise, freezing up, but they were intended to help with keeping heat when it was cold out, so that more heat could be utilized with the factory aircleaner. (Dump EM)

02-10-2004, 09:47 PM	#1
avejoe Custer had a plan too. Join Date: Dec 2003 Location: No. California Posts: 344	Purpose of Heat Risers What is the purpose of the heat risers that are located where the exhaust pipe attaches to the manifold? Mine are missing. Is this a problem?

02-10-2004, 09:56 PM	#2
casey Registered User Join Date: Jan 2003 Location: Kelowna B.C. Canada Posts: 2,048	if I'm not mistaken, there usually on one side and it restricts the exhaust when the vehicle is cold, and the exhaust runs through the intake manifold over to the other exhaust manifold instead to help warn it up, I stand to be corrected Last edited by casey; 02-10-2004 at 09:59 PM.

02-10-2004, 10:01 PM	#6
jorgensensc Registered User Join Date: Jul 2003 Location: Cypress, Tx Posts: 4,005	I took out the innards of the heat risers on my old '80,'82,'83,and'85. Your truck will eventually warm up. __________________ 1972 C20 Suburban- Big Blue Betty '56 Chevy Bel Air Sedan- Frame up Restoration -What would you attempt to achieve if you knew you could not fail?- -I Refuse To Tiptoe Through Life, Only To Arrive Safely At Death's Door- R.I.P. EAST SIDE LOW LIFE

02-10-2004, 09:56 PM	#3
69 air cab Registered User Join Date: Oct 2003 Location: Maryville, TN Posts: 477	Great question avejoe.........I have the same problem. I am looking for one.

02-10-2004, 09:56 PM	#4
Kenneth Brown Registered User Join Date: Jan 2004 Location: Donie Texas Posts: 44	Not in calipornia its not. When the engine is cold the riser will close some so as to retain more heat in the motor. Its not a problem in a warm climate.

02-10-2004, 09:59 PM	#5
rage'nrat638 Account Suspended Join Date: Mar 2003 Location: THE FALL GUY CHICAGO IL Posts: 5,883	my header's don't have that

02-10-2004, 10:11 PM	#7
Bowtie67 Registered User Join Date: Jan 2004 Location: NH Posts: 2,266	Adding weight, making noise, freezing up, but they were intended to help with keeping heat when it was cold out, so that more heat could be utilized with the factory aircleaner. (Dump EM)



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