73-87chevytrucks.com

73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: o2man98 on November 02, 2009, 04:02:19 pm

Title: EGR Manifold on non-EGR engine
Post by: o2man98 on November 02, 2009, 04:02:19 pm

I have a 1981 GMC C20 with 350 and an Edelbrock Performer EGR manifold. There is no emission equipment on the truck but the manifold has a simply steel threaded plug where the EGR valve should be. Is this the correct way to block the EGR in the intake?

Title: Re: EGR Manifold on non-EGR engine
Post by: eventhorizon66 on November 02, 2009, 06:09:21 pm

The EGR is usually blocked off with a plate.  I'd say if it doesn't leak a NPT plug is OK too.

http://www.summitracing.com/parts/WND-9007/

Title: Re: EGR Manifold on non-EGR engine
Post by: Jim Rockford on November 05, 2009, 01:25:56 pm

Problem is there are 2 ports for EGR the one coming from the exhaust crossover and the one going to the Intake plenum, If just the exhaust side is threaded and plugged , you will still have a major intake leak . so that is why people use a plate , it covers both ports.

Title: Re: EGR Manifold on non-EGR engine
Post by: o2man98 on November 05, 2009, 05:30:07 pm

Quote from: Jim Rockford on November 05, 2009, 01:25:56 pm

Problem is there are 2 ports for EGR the one coming from the exhaust crossover and the one going to the Intake plenum, If just the exhaust side is threaded and plugged , you will still have a major intake leak . so that is why people use a plate , it covers both ports.

The manfold still has the plate that the EGR valve itself screwed into. It looks like the EGR valve was unscrewed and a plug put in. I do not see any other hole in the area.

Title: Re: EGR Manifold on non-EGR engine
Post by: Jim Rockford on December 11, 2009, 10:04:20 am

Not really getting what you are saying...got any pics?