Identifying Hose
Thread Starter
Heel & Toe
Joined: Oct 2014
Posts: 20
Likes: 0
Identifying Hose
Can anyone identify the hose in this picture circled in red? On my 79 vette it is not clamped on whatsoever, so you can literally just pull it off without any effort. I just put zipties on both ends to keep it on, but should I replace it for the long run?
Team Owner
Joined: Aug 1999
Posts: 30,995
Likes: 99
From: Ontario
The part on the exhaust manifold is called a heat stove. Keep it; pretty rare these days. That hose is typically ribbed metal and any local parts store can get it. Less than $5.00. As said above it aids in cold start heat-up.
When I had my 1979 (years ago) I always painted it with flat heat paint.
When I had my 1979 (years ago) I always painted it with flat heat paint.
Last edited by Paul L; Apr 6, 2015 at 07:29 PM.
Thread Starter
Heel & Toe
Joined: Oct 2014
Posts: 20
Likes: 0
The part on the exhaust manifold is called a heat stove. Keep it; pretty rare these days. That hose is typically ribbed metal and any local parts store can get it. Less than $5.00. As said above it aids in cold start heat-up.
When I had my 1979 (years ago) I always painted it with flat heat paint.
When I had my 1979 (years ago) I always painted it with flat heat paint.
Team Owner
Joined: Aug 1999
Posts: 30,995
Likes: 99
From: Ontario
All vendors will have different numbers but here is one example.
http://www.zip-corvette.com/catalogs...sult/?q=EH-449
http://www.zip-corvette.com/catalogs...sult/?q=EH-449
Melting Slicks
Joined: Sep 2004
Posts: 3,227
Likes: 671
From: Northeast
or you can save on shipping by checking your local auto parts store and ask for a "preheater hose" (or search yourself). You would need to know the diameter and length and they do come in black. FYI.
Team Owner
Joined: Aug 1999
Posts: 30,995
Likes: 99
From: Ontario
Team Owner
Joined: Jan 2006
Posts: 37,637
Likes: 3,118
From: Crossville TN
For that duct to be of any use, the vacuum operated damper on that air cleaner inlet must be working as intended. When engine is 'cold', that damper should close off the inlet tube so that only warm air through that duct (from the exhaust manifold) is entering the air cleaner. Once the engine warms up (and temp sender turns that vacuum damper OFF), that damper should be fully open.
If that damper no longer works, that duct is of no use other than for appearance purposes.
If that damper no longer works, that duct is of no use other than for appearance purposes.
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Thread Starter
Heel & Toe
Joined: Oct 2014
Posts: 20
Likes: 0
For that duct to be of any use, the vacuum operated damper on that air cleaner inlet must be working as intended. When engine is 'cold', that damper should close off the inlet tube so that only warm air through that duct (from the exhaust manifold) is entering the air cleaner. Once the engine warms up (and temp sender turns that vacuum damper OFF), that damper should be fully open.
If that damper no longer works, that duct is of no use other than for appearance purposes.
If that damper no longer works, that duct is of no use other than for appearance purposes.
Burning Brakes
Joined: Sep 2009
Posts: 1,124
Likes: 140
From: Western New York
That pre-heater system does absolutely nothing to help you "START" your engine. If you have to floor it, it sounds like you have a choke problem. After your car is started and running, that system pre-heats incoming air to aid in better driveability when the engine is cold. As soon as the engine reaches the proper temp. that system turns off. Your starting problem is not in that system.
Duane
Duane