Where's your IAT? (CSL guys)

[SUPREM3///]

Did you ever find a 14mm cap to plug it? Where did you put your IAT?

I did, I found a rubber stopper (like wine bottle tapered cork, but in rubber) at local hardware store. I ended up cutting the stopper so it was only about 1/2" long, right in the middle of the size range that was right for the hole - something like 13.5mm to 14mm. Stuck in now, hasn't moved, and I've been driving the car a bit lately.

IAT is secured to bottom of headlight assembly right now, which is right infront of the air path from eventuri scoop to airbox "mouth."

If you ever need cap/plugs check out www.caplugs.com (free samples). I got the perfect cap for the lower inlet on the Karb box here (again, free samples)

[marksae]

Stock E46 CSL intake sensor is 13 62 1 739 510

Sorry, I should have worded my question a little better. I am currently running a CSL tune with the stock CSL IAT in its original location. I want to relocate the sensor using an e34 or e36 sensor. Will I need to recalibrate my ECU?

[BMWfanz]

I have a converted ECU that's running the CSL software and MAP sensor. I want to relocate my IAT. Which sensor do I use? Is the E36 IAT (p/n13621725323) the correct one to use?

Stock E46 CSL intake sensor is 13 62 1 739 510

[marksae]

I have a converted ECU that's running the CSL software and MAP sensor. I want to relocate my IAT. Which sensor do I use? Is the E36 IAT (p/n13621725323) the correct one to use?

[Tbonem3]

I did, I found a rubber stopper (like wine bottle tapered cork, but in rubber) at local hardware store. I ended up cutting the stopper so it was only about 1/2" long, right in the middle of the size range that was right for the hole - something like 13.5mm to 14mm. Stuck in now, hasn't moved, and I've been driving the car a bit lately.

IAT is secured to bottom of headlight assembly right now, which is right infront of the air path from eventuri scoop to airbox "mouth."

[Epsilon]

That helps thanks! I can get a 14mm cap, and it should squeeze in.

Did you ever find a 14mm cap to plug it? Where did you put your IAT?

[fourmula1]

Yes, that's the CSL sensor, not the gold-ish colored (maybe cad plating or is it brass?) E34 M5 iat.

Thanks very much.

[Tbonem3]

Yes, that's the CSL sensor, not the gold-ish colored (maybe cad plating or is it brass?) E34 M5 iat.

[fourmula1]

Just moved mine tonight and switched to US Spec. Scaling to account for the different sensor.

Could anyone confirm which spec IAT this is? My cursory understanding is that there is a "E46 CSL" vs "US" spec? I believe the one I have pictured has CSL scaling? I am just trying to confirm for my tuner which scaling this one has. I think they have an idea but want us to confirm it.

Thanks

[Tbonem3]

That helps thanks! I can get a 14mm cap, and it should squeeze in.

[heinzboehmer]

Thanks for the insight.

1. I didn't expect to plug the very outside edge, but the inner opening.

2. Hoping to find a plug with a tight enough fit so it stays in place.

3. Looking for the least visible/protruding solution.

Fair enough. Keep us posted with how it goes!

Not sure if this is still useful, but engine bay was half taken apart so I took these measurements.

ID of bung:



OD of bung:



Depth of bung (caliper is set up like that just for the pic):



ID of part where o ring goes (this was also measured non-stupidly, but caliper is set up like that for the pic):

[Tbonem3]

Thanks for the insight.

1. I didn't expect to plug the very outside edge, but the inner opening.

2. Hoping to find a plug with a tight enough fit so it stays in place.

3. Looking for the least visible/protruding solution.

[heinzboehmer]

That's a little Jared aka bulbus for me. I might have to though. I'm going to try some blind plugs first.

I'm not entirely sure a blind plug will work. The port has a slit in it and the actual sealing happens with an o ring further in. Pic for reference:



Plus, that part of the airbox isn't seeing a vacuum continuously, so I wouldn't trust that the plug won't fall out. You'll likely need to use a cap like shown above or a spare sensor. Could maybe even 3D print/machine something that clips in using the same mechanism and has an o ring at the end for sealing.

[Tbonem3]

That's a little Jared aka bulbus for me. I might have to though. I'm going to try some blind plugs first.

[zzyzx85]

I'm using one of these to cover the OE IAT port.

I have a few more somewhere around here if anyone wants to buy one.