Removal of Air Smog system 87 v30 454 4BRL Carb

[Patrick Majers]

Hi all, Im pretty new to the carbureted engine world, and have developed a rusted out tube that is connected in 4 spots on my drivers side exhaust manifold. I have a 1987 V30 with a 454 4 barrel carburetor. After a little research, I have found that it is apart of a smog system that most people seem to remove, so I was wondering what all I go through to remove that entire system. Basically all that I know is that I pulled the drivers side tubes off of the other 3 ports into the manifold, so I will have to pull the other side and weld those holes shut on the manifold. My truck is a plow truck, so everything is rusty as hell, so unscrewing those nipples isn't an option. This truck also has 2 air pumps that I need to remove, so I went ahead and removed the top one, and a couple of the obvious lines. Now i'm at a bit of a standstill, so any help you guys can provide would be much appreciated!

 

[bucket]

You can remove both pumps, the associated hoses and also the secondary charcoal canister if it's still there. Replace the alternator belt with Dayco# 5060530.

 

[Patrick Majers]

You have any pictures? Im heading to my shop now to post pictures of what I have done so far


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[AuroraGirl]

Hi all, Im pretty new to the carbureted engine world, and have developed a rusted out tube that is connected in 4 spots on my drivers side exhaust manifold. I have a 1987 V30 with a 454 4 barrel carburetor. After a little research, I have found that it is apart of a smog system that most people seem to remove, so I was wondering what all I go through to remove that entire system. Basically all that I know is that I pulled the drivers side tubes off of the other 3 ports into the manifold, so I will have to pull the other side and weld those holes shut on the manifold. My truck is a plow truck, so everything is rusty as hell, so unscrewing those nipples isn't an option. This truck also has 2 air pumps that I need to remove, so I went ahead and removed the top one, and a couple of the obvious lines. Now i'm at a bit of a standstill, so any help you guys can provide would be much appreciatesome people weld a nub of steel into the holes. you have a rare smog setup i think, keep it and ebay it. some cali person might noeed it one day.

 

[Patrick Majers]

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I have marked with an X what else i am taking out. Once those items are removed, and I weld the exhaust manifold holes shut, i am basically unsure of what else needs to be removed/ done. FYI, i am trying to get the nuts removed from the manifolds, so i can screw in a pipe plug, before i am resulting in welding them shut.


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[Patrick Majers]

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This is everything I have removed so far


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[bucket]

That other air pump is about all you have left.

This is everything I removed:

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I wouldn't throw the parts out either. The reason I had that picture handy is because recently I had come across a fella in Colorado that needed those parts. So they are in Colorado now and will be used again.

 

[Patrick Majers]

Why did you remove that other steel filter? Also, I would like to know what to remove on this diagram.

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[bucket]

I removed the flame arrestor (pretty sure that's what it was anyway) because it seemed restrictive. The butt dyno confirmed it.

I only removed the stuff 100% directly related to the smog pumps. The engine ran great and I didn't see the need to remove anything else.

On my '84 (small block then) though, I removed every last scrap of uneeded underhood hoses and valves. It was all a cobbled mess in that case. I plumbed in a PCV valve, spark advance, brake vacuum and hvac supply. Those last two are not needed on a non-ac truck with hydroboost brakes.

 

[Patrick Majers]

So the thing inside the actual filter is the flame resistor? And you left the parts on each exhaust manifold??


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[bucket]

So the thing inside the actual filter is the flame resistor? And you left the parts on each exhaust manifold??


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Yes, I left the injection lines in place but they were in good condition. I only crimped the main inlet closed to prevent minor exhaust leaks. I would have removed them too, but they were seized in the manifolds.

 

[Vbb199]

Holy vaccuum hoses batman! Wow! Lol

 

[bucket]

Holy vaccuum hoses batman! Wow! Lol

This is kinda funny.

Pre-smog '78 (AC pump not installed though):

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'86 height of smog:

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^^It was frustrating just to check/add oil. Let alone replace a thermostat or change the plug wires.

 

[Patrick Majers]

Both sides on mine were rusted out, so i just ripped them off, and broke the nut off with my breaker bar, then i plan on welding the holes shut. Does that sound sufficient?

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[Patrick Majers]

And then any of the vacuum lines that came off of the pumps, I will trace back to a T, or wherever it enters something, and cap it off. And any electrical plugs that i disconnected, I will just leave and wrap in electrical tape. Please comment anything else I am missing, or if I should do something differently. Wont be working on this again til Friday since I’m waiting on a water pump. Should also give ample time for others to see this post.