in the middle of deleting my smog garbage. i removed the air diverter and now need to cap off the manifold check valves. but, what exactly needs to be removed? and how would i cap it off?

 

 

 

If you're able to get the check valves off..... (Threads tend to fail as you begin to wrench on them) I hear that the threads are 3/4" NPT. Simple cast iron black pipe caps I hear work.

To played it safe I left the check valves on and simply bought some rubber caps and used the stock clamps to hold them in place. Been running it that way for years and no issues.

 

Are you in a state that requires emissions testing?

 

This topic sure comes up a lot.
Why would you cap off the check valves rather than just remove them??...

 

i am removing them, i just wanted to make sure i was on the right page. i’ve only seen smog deletes on later models and the check valves are different.

 

no, which is why i’m deleting emissions stuff

 

i have them soaking in pb blaster right now. i’ve also heard 1/2 inch caps work so i’ll just buy both and return whichever doesn’t fit.