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Discussion Starter · #1 ·
I removed the AIR system on my 96 Camaro Z28 and what I have left is two small diameter pipes, one on each side of the engine that are welded to one header pipe on each side. The top of the each pipe has threads which I believe from forum research are 22mm in diameter. If anyone can confirm this, please let me know. I have been looking for 22mm X 1.5 cap nuts to close off the threaded openings on the two pipes but I cannot find them anywhere. I don't have access nor do I want to pay for a welder to close off the opening in the header pipes. Any help would be appreciated.

Thank you very much,

James

96 Camaro Z28 LT1 engine.
 

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Mine Were 3/4 or 5/8 npt thread.. not 22mm. I went to my local hardware store and got brass caps and was all good.
 

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Pretty sure it was 3/4 if memory serves.. i did it like 4 mo ago so still pretty fresh in the ole noggin.
 

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Discussion Starter · #6 ·
Pretty sure it was 3/4 if memory serves.. i did it like 4 mo ago so still pretty fresh in the ole noggin.
I could not find these at 3 different hardware stores. I have to order them online. What is the thread size? Are they 3/4 X 10?


Thanks
 

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Npt is the thread.(national pipe thread) .its a gas pipe thread like you would use on a gas line in you house.. just go to the gas line section and get a 3/4 cap.. I'm 90% sure that's what I got. Maybe ill swing through my local ace and confirm for ya.
 

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Hiya
I researched this when i took AIR of my Mac Mid length headers.
I bought some M22x1.5 Nuts to fit
HTH

Mitch
 

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I DONT KNOW IF YOU WILL LIKE THIS METHOD,but Once I removed everything I checked the size of the hole that I was trying to plug. Once I determined that,I bought a tap set and threaded the hole,then bought some proper size bolts,cant remember the exact size,and installed them and everything has been fine.And the underhood area looks less cluttered. Also once you remove the Air pump you will need some PCM
programming to switch off the trouble light.ed
 

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I just did mine I put some rubber vacuum plugs over them. cheap from autozone the size was real close to a half inch.
If you used anything but metal on the exhaust manifold,it wont last very
long.That manifold reaches temperatures that will destroy those rubber plugs. I would revert to plan B. ed
 

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Discussion Starter · #12 ·
Got my threaded pipes closed up with 5/8" brass flared end caps. Do I remove the small rubber hose from the top of the intake elbow that is plugged in with the little 90 degree elbow?
 

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That's for your vented opti. Leave it!
 

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Discussion Starter · #15 ·
Do I need to put a nut on the stud that is one of the mounting holes in the water pump that I believe was for a bracket for the air pump? Also are there any of the bolts from the AIR pump that need to put back in the holes for the water pump?
 

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Well make sure have all the bolts. In the pump.. but no need to put nuts on if not needed also no need to use anything else if not needed.. I bolted my coil to the head with a spacer just for heat sake. But didn't use anything else.
 

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Discussion Starter · #17 ·
Guess my question is do any of the bolts on my 96 Z28 that were taken out to remove the AIR pump need to be put back in the holes they came out of for the water pump?
 

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Your water pump should have 3 holeson each side and yes you should have 3 bolts in it.. the water pump needs all holes bolted to block.
 

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Discussion Starter · #19 ·
Your water pump should have 3 holeson each side and yes you should have 3 bolts in it.. the water pump needs all holes bolted to block.
I really do appreciate your assistance, but I need to know if any of the bolts you referenced here were bolts I took out to remove the AIR pump?
 

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This should not.be that difficult... Does your water pump have three bolts on d side .. them your good. Only shared bolt is the One bolt has a stud that the br for the airpump bolts to,, you didn't need to remove this to take that bracket off. But if you did put it back.. throw the bracket and air pump at a mustang and forget about it.
 
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