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heat riser valve

A

acman60

Guest
can i remove the heat riser valve on my 1979 and put a spacer in.or dos it have to stay connected thanks
 

bradfordsvettes

Well-known member
Joined
Mar 28, 2001
Messages
549
Location
Boston, MA area
Corvette
jewel blue 61.cranberry 69 t-top.black rose 92
You could remove it .if you drive in the cold weather it will affect warm up drivability steve
 

G Winter

Well-known member
Joined
Aug 21, 2004
Messages
2,177
Location
NW Iowa
Corvette
1990 red convert 6 sp
The function of the heat riser is to direct exhaust gas through the intake to warm the carb. when the engine is cold. It also helps warm the choke on many cars. Removing it can make the engine cold blooded and have the choke stay closed to long. You might have to go with a manual choke.

Glenn
:w
 

RUSS O'BLENES

Active member
Joined
Aug 23, 2006
Messages
29
Location
LYNN MASS.
Corvette
1970 BRONZE COUPE/WHITE 69 CONV
can i remove the heat riser valve on my 1979 and put a spacer in.or dos it have to stay connected thanks
I LIVE IN MASS AND HAVE FOUND THAT MANY OF THEM AFTER YEARS END UP STUCK CLOSED, ESPECIALLY CARS THAT HAVE BEEN SITTING FOR A WHILE. I WOULDN'T EVEN BOTHER WITH THE SPACER. JUST SAFTEY WIRE IT OPEN AND FORGET IT. TO BE HONEST THOUGH, IF THE ENGINE IS STOCK YOU WON'T NOTICE ANY PERFORMANCE DIFFERENCE. I HAVE NEVER NOTICED ANY ILL EFFECTS IN COLD WEATHER IN ANY CARS THAT I HAVE DONE IT TO. HAPPY MOTORING. RUSS
 
A

acman60

Guest
thanks for the help.car will not run in the winter,anyway. mark s
 
Joined
Apr 2, 2004
Messages
4,611
Location
Newark, Delaware
Corvette
1965 Coupe L76 / 1978 L82
it only helps to redirect warm air back into the intake to help warm up the intake and carb faster. In the summer it's trivial and in the winter it's only a few extra minutes of warm up time.

You can easily remove the heat riser valve and replace it with a spacer piece.
I did the same thing on my '65
 

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