What part is this?

[kewpie79]

I figure it is some part of an exhaust. How does it work, where does it go and anything else you could tell me. Thanks, the info here is great.

 

[tc1959]

Do a Google search for "Heat Riser Valve". :wink:

 

[oldtinsmith]

It's a EFE (early fuel evaporation) valve. The valve is located between the exhaust manifold and the exhaust pipe, and, It's operated by vacuum and controled by either a thermal vacuum valve or electric solenoid. The valve causes hot exhaust gases to enter the intake manifold heat riser passages and heat the incoming fuel mixture.

Doug

 

[kewpie79]

Thanks for the info