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L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

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Old 09-25-2003, 04:10 AM   #1
CentralCoaster
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Location: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Default How to: Remove your L98 smog equipment: PICS inside

I removed all this crap from my Corvette today:
Click the image to open in full size.

The air tube going across the front of the engine was a PITA to remove. But I was persistent. I had to remove the fan, the fuel lines, pull the A/C forward, and remove the water pump pulley to get to it (in addition to all the other crap on top of that.)

The smog pump had 6 teflon pieces inside the walls of the rotor (not pictured), that the fins slide against when turning. If you break the fins out, but don't remove these pieces, they can potentially come out, or jam, or rattle and make more noise than it did to begin with. And they're a pain to remove. Save the hassle and buy a smog pump eliminator pulley kit.

Here's the engine afterwards:
Click the image to open in full size.

You can see here that I used 1/2" stainless steel caps to plug the air injection lines on the ported headers. (Those are FACTORY headers by the way!) I didn't bother blocking off the smog pump outlet, since it no longer pumps air with the fins removed. I also pulled the AIR line to the cat. I plugged the hole with a fine thread bolt of the correct size, and some Copper RTV.

Click the image to open in full size.

I plan on replacing the catalytic converter with a test pipe, or just getting whole new exhaust, (when I land a job.) I haven't pulled anything off that I can't put back on. When I have to smog it next year, I'll try a pretest with the smog stuff off to see if I pass. I might even sneak past the visual if the tech isn't up to snuff. Worst case scenario, I have to spend a few hours bolting that box of crap back onto it! :auto:
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Old 09-25-2003, 07:00 AM   #2
Steel Blue 91
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Default Re: How to: Remove your L98 smog equipment: PICS inside (CentralCoaster)

Nice work Kevin. Sure does clean up the engine compartment. I was thinking of doing the same thing, but I need to pass the smog every year.
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Old 09-25-2003, 11:10 AM   #3
AGENT 86
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Default Re: How to: Remove your L98 smog equipment: PICS inside (CentralCoaster)

:cool:
Your so far ahead on your list that i'll never catch up :smash:
:cheers:
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Old 09-25-2003, 01:49 PM   #4
oldace84
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Default Re: How to: Remove your L98 smog equipment: PICS inside (CentralCoaster)

Kevin,

Great job.
But how are you going to get by the Smog ****'s?
I think your in CA.
If theres a secret let me know.
thanks
tony
:flag
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Old 09-25-2003, 01:57 PM   #5
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Default Re: How to: Remove your L98 smog equipment: PICS inside (CentralCoaster)

How do you deal with the check engine light from removing the air control valve and burn off mod?
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Old 09-25-2003, 03:30 PM   #6
Vettski
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Default Re: How to: Remove your L98 smog equipment: PICS inside (CentralCoaster)

Nice job :cool: Is there any HP increase with all that junk off?
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Old 09-25-2003, 04:36 PM   #7
J Z06
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Default How to: Remove your L98 smog equipment: PICS inside

It really neatens the passenger side.

I especially like the look of the smog pump elim. :cheers:
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Old 09-25-2003, 04:43 PM   #8
CentralCoaster
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Default Re: How to: Remove your L98 smog equipment: PICS inside (Jay 383)

Quote:
I especially like the look of the smog pump elim. :cheers:
:confused: I just gutted it. But yeah, an elim would be nice on there. In fact, before I did that, I'd just fab up my own bracket for the alternator and move it... or something to that effect.

UnRiced: Removing the AIR diverter solenoids does not throw a code. (Which shows you how much GM cares about California asinine smog laws. :rolleyes: ) Just make sure you plug the vacuum line going to them, or remove it completely and hook the fuel pressure reg directly to the forward vacuum port on the side of the plenum.
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Old 09-25-2003, 04:46 PM   #9
CentralCoaster
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Default Re: How to: Remove your L98 smog equipment: PICS inside (CentralCoaster)

BTW, the smog pump has a pretty hefty rotor in it. I'm guessing the rotating mass take almost as much energy to overcome as it pushing air with the fins.

It's basically equivalent to a 'frisbee' as far as the belt system is concerned, but not as easily circumvented.
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Old 05-09-2011, 01:38 PM   #10
RedBowTies88
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Holy old thread batman!


if the OP is still around any chance you could re add the pics if you have them?
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Old 05-09-2011, 01:48 PM   #11
cuisinartvette
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hes on c4guru. com no longer here.
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Old 05-09-2011, 01:52 PM   #12
RedBowTies88
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10-4, thanks
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Old 05-09-2011, 01:52 PM
 
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