73-87chevytrucks.com

73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: millmaster65 on February 16, 2010, 05:33:04 pm

Title: heat riser valve door is gone
Post by: millmaster65 on February 16, 2010, 05:33:04 pm

I think the heat riser valve only helps with warm up. True or False?
I am currently replacing exhaust manifold gaskets an noticed there is no gate inside the valve.
If I decide not to replace the heat riser valve, would this affect overall performance?

Title: Re: heat riser valve door is gone
Post by: VileZambonie on February 16, 2010, 05:34:57 pm

It's mainly used to reduce warm up time to decrease emissions not necessarily for driveability.

Title: Re: heat riser valve door is gone
Post by: millmaster65 on February 16, 2010, 05:45:19 pm

That's what I thought.
Thank You Sir