Up pipe Question

[oz *sti*]

Just bought a new Megan exhaust mainfold of the old ebay, now I have a sti v3 and on the up pipe there is a sensor hole and one in the manifold. The mainfold hole does have a bung in it so that can be block if it is not to be used, but the top hole did not come with a bung.

Question is with my car being a classic will I use this sensor? if not does anyone know where can I get a bung to block it of??

thanks in advance guys.

[drb5]

You should be able to either get an old knackered lambda sensor, just to fill the hole or even weld it up, if you want![]

 

Just to add, it LOOKS like the same sized thread as a lambda, but kind of hard to tell from a pic.[]

[jamie_wood]

Up pipe one will be for Gas temp and the header one will be for the Lambda probe.

I would of thought you would just swap your sensors over. No?

 

[drb5]

How'd you mean Jamie, swop the sensors over?

 

If Jamie is correct, which i think he is, about he EGT temp sensor, it may be the same thread then, as a usual sized wheel bolt.

[jamie_wood]

If the car has still got its EGT probe then I would just leave it out. Its not required for Air/fuel adjustment.

Its only there as a "last resort" or Fails safe for when/if the gasses get past a certain temp (1700 or 1800deg AFAIK)

Thread size is just an M12 x 1.25.

Get on from you local "Hardware" store[] or Halfrauds if thats easier.

[jamie_wood]

And its M18 x 1.5 for the Lambda/O2 sensor.

But you have a Bung for that anyway dont you.

[drb5]

I thought it was just the V1 and 2's that had the EGT prob?

[jamie_wood]

Not 100% sure Dave. Woulnt want to say for defo.

He will soon know when he pulls the old ones off.

Regardless, its a 12 x 1.25 to bung the hole []

[fai17]

It's very hard to get a bolt to fit that thread.

I had that problem too when i got my headrs and up pipe.I would either weld that up or get a time belt bolt that has the same thread(i think).

Hope that helps.I don't think the STI has EGT sensor.

[steven_williams]

Had a similar problem on my bugeye, but two threads on the up-pipe. One with a bung looked same as for a lambda sensor, the smaller one for a EGT probe. This one turned out to be Metric Fine and had to be made sorry cant remember thread size and pitch. Hope this helps a bit Steve

[higgy]

Why not tap it out to a standard metric thread and then put a metric bolt into the hole......................Problem solved!!!!!!!!!!!!!!!!!

 

Higgy