I've removed the AIR injection from my 95LT1 Trans Am. It has the BBK headers which have outlets for the AIR tube to screw in. I need a plug or bolt that will fit the threads. Anyone know what size I need, and where to order it from?

Thanks

Jason

 

i think its a 22mm plug. But i'm not totally sure.

 

it is, good luck finding one that size. hehehe you can search for 22m drain plug on google and find a vender that way

 

Anyone else? I'm sure I'm not the only one to run into this.

 

This website is often given out:

http://www.cgenterprises.com/drain_plugs_metric.htm

Although you should be able to find them locally. Hit a random quickie oil change place, and ask them for oil drain plugs in the size you need.

Better double check the threads here to make sure the BBK headers take a 22mm before shopping for them.

 

Napa has them, they're around ~9 a piece. M22 (BMW) oil drain plug.

 

I believe they are M22 x 1.50. I guess I'll order a set from CG Enterprises in Canadia

thanks

 

I paid $2.50 each for M22-1.5 oil drain plugs, plus 98-cents for a couple of copper washer to seal them.

On the remote chance that your 95 is a "CA emissions" A4, it will have the M18 threads that were used in the 96/97 dual cat cars, rather than the M22's for the single cat cars.

Measure the fittings you unscrewed from the headers. If they are about 7/8" diameter, they are M22. If they are closer to 11/16", they are M18.

 

yup. 7.50 a piece for mine.

 

Well, I got a thread guage, and it turns out that it is NOT metric. I measured the diameter with a micrometer.

The actual size is: 7/8" x 18 thread pitch, which is very close to 22mm x 1.50. So, I ordered 2 from CG enterprises for $5.95 each.

Thanks anyway

 

I would double check your gauge. i used english threads before and I had to use wrench to crank them in and out. i popped in the metric ones after and I could thread them in by hand.

 

somone told me 7/8 but i could not get them to go in so I went and got the 22 / 1.5 from napa for like 3$ and they worked great with come copper washers.

 

The guage was right - I double and triple checked.. I'll post up whether or not they fit right. I even tried the 1.5 thread guage, and it was clearly off. The 18 guage fit perfectly, though. We'll see in about 1 week or so.

 

When I pulled the AIR connections out of my AS&M's, they were so tight they were deforming inside the wrench - and they had only been in there for a few months. When I then screwed the M22-1.5 plugs in, they fit perfectly, with no binding. If they are the wrong size, they are a pretty decent substitute... but do it any way you want to, its your car.