EGR valve

Tiny
PAPAW51
  • MEMBER
  • 1984 JEEP CJ7
  • 4.2L
  • 6 CYL
  • 4WD
  • MANUAL
  • 167,000 MILES
I removed the EGR valve yesterday, it was stuck open, return spring works, diaphragm is not capable of holding any vacuum and the expected nasty oil soaked carbon buildup is there. Intake manifold port is remarkably clean, exhaust manifold port is dry black soot, much like the tailpipe. I made a plate and gasket to block off the manifold ports. My question is, do I need to get the EGR valve operational for my engine to breath correctly, also is there any danger of building any pressure that would damage oil seals if I continue to run with the manifold ports blocked off? The only vacuum that is operational is PCV valve and vacuum advance. Both from separate sources. CJ MEDEVAC, if you happen to get wind of this, feel free to wax poetic about your assessment of my issue here.
Thanks to any replies in advance.
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Thursday, March 14th, 2019 AT 1:49 PM

7 Replies

Tiny
ASEMASTER6371
  • EXPERT
Good afternoon.

No, it will not cause any issues. It is there for emissions issues. If you are in a state that has emission testing and yours needs to be tested, then yes, it has to be hooked up and working.

Otherwise you can leave it blocked off.

Roy
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Thursday, March 14th, 2019 AT 2:43 PM
Tiny
PAPAW51
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Thanks asemaster. I appreciate your answer.
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Thursday, March 14th, 2019 AT 2:46 PM
Tiny
CJ MEDEVAC
  • EXPERT
Block it off!

One less thing to go wrong.

When you have headers, there is no EGR provision.

Engine works fine!

The Medic
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Thursday, March 14th, 2019 AT 3:46 PM
Tiny
PAPAW51
  • MEMBER
On it! I appreciate the answers. Maybe soon I will have a hard question to answer and challenge you guys a bit. Haha. Carrying on.
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Thursday, March 14th, 2019 AT 3:51 PM
Tiny
CJ MEDEVAC
  • EXPERT
Keep us posted!

The Medic
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Friday, March 15th, 2019 AT 7:23 PM
Tiny
PAPAW51
  • MEMBER
Okay. Will do. My homemade EGR cover plate seems to be working fine. Gasket is holding no exhaust or vacuum leaks around the plate, that I can tell anyway.
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Saturday, March 16th, 2019 AT 6:56 AM
Tiny
ASEMASTER6371
  • EXPERT
Good. Keep an eye on it for any leaks.

Roy
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Saturday, March 16th, 2019 AT 7:02 AM

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