What is this? Engine bay in SC

[Hulley]

What are the two items circled? I'm assuming one is a smog bracket of some sort but what about the small thing near the engine mount? I'm trying to remove the bracket and the small round thing is in the way.

[walt]

Air pump for smog control. Most people delete.

[Hulley]

Originally Posted by walt

Air pump for smog control. Most people delete.

So can i pull out the round thing?

[yelcab1]

You can but you need to plug that hose/pipe because it will make exhaust leak noise

[Alfasrule]

Or you can get an Air Pump and make it right. It doesn't impede the performance at all. Got cars with and without and no performance difference.

[HaroldMHedge]

When you remove the round check valve an exhaust leak will be created. Most people remove the spaghetti air injection tube along with the valve and plug the ports at the head.

Porsche Air Injection Smog Pump Port Plug with washer, sold individually

[MichaelSJackson]

And plug the hole remaining in the tin, once the "round thing" is removed. Jeez I let a lot of road grime into the engine compartment!

[911obgyn]

And exhuast heat sucked up into the motor!

[AlKidd]

What did you plug it with? Ive got the hole in my tins and a surprising amount of debris comes up.

Originally Posted by MichaelSJackson

And plug the hole remaining in the tin, once the "round thing" is removed. Jeez I let a lot of road grime into the engine compartment!

[Mark Salvetti]

I riveted an aluminum plate over mine. You can also try an expansion plug.

Mark

[Hulley]

Originally Posted by MichaelSJackson

And plug the hole remaining in the tin, once the "round thing" is removed. Jeez I let a lot of road grime into the engine compartment!

I didn't realize it was a check valve until this thread. lol

[MichaelSJackson]

AlKid,

I also used 3 rivets to place a little aluminum below the hole.

MJ

[Hulley]

Originally Posted by HaroldMHedge

When you remove the round check valve an exhaust leak will be created. Most people remove the spaghetti air injection tube along with the valve and plug the ports at the head.

Porsche Air Injection Smog Pump Port Plug with washer, sold individually

Thanks for the link, I checked underneath and the air injection tube is still in place.

[Mark Salvetti]

The problem is if you want to remove the injection tubes intact, you have to remove the heat exchangers and risk snapping exhaust studs. If you don't care to save the tubes, you can cut them. They are surprisingly easy to unscrew from the heads.

Mark