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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: Hulkjoegan on March 04, 2018, 03:49:51 pm

Title: Exhaust butterfly valve
Post by: Hulkjoegan on March 04, 2018, 03:49:51 pm

85 Suburban 454
Previous owner pulled a lot of emissions stuff off the motor, including the line to the butterfly valve on the drivers side exhaust pipe
1. With no vacuum, is it open or closed?
2. Does it need to be hooked up?

Title: Re: Exhaust butterfly valve
Post by: Captain Swampy on March 05, 2018, 05:42:24 pm

I'd remove the vacuum line and tack weld it open.