just wondering if anyone else has done this.

the egt hole for my egt probe has warped a little so the probe doesnt fit in tightly. when driving, the probe would pop out and has been an annoying problem. im going to stay with stock manifold as long as i own the car so im thinking of welding a part of the egt probe to the manifold itself.

i went to ask a local shop and they said that you can not weld metal to the exhaust manifold because its cast iron. i later called another shop in socal thats well known for our cars, and they said that you indeed can weld it on.

just want to know if anyone has done this? thnx fellas

 

you will destroy the sensor if you weld it to the manifold.


if on the otherhand you decide to weld in a bung for the probe to thread into, that will work (assuming you can weld the two materials together).

 

cast iron is difficult to weld properly (meaning it'll not crack later on). It has to be heated in an oven, welded, and cooled at a controlled rate. Plus, ideally you should be welding cast iron to it, not mild steel or stainless.

Can you drill/tap the buggered hole to a larger size and then use a threaded reducer?

 

Find a tap that is the correct size of the threaded bung for the egt gauge. Drill a hole in the correct runner, get the tap and thread the hole, and after that screw the bung in for the egt gauge.

 

Or buy a ported mani. from Buschur and have them tap it for you.

 

thanks for your input, fellas. im also throwing these 2 ideas around....
1. find a right size bolt to plug up the current hole and drill another egt hole in header #1. right now it is drilled in #2.
2. switch the manifold with another oem one and start from scratch again.

 

Can't you just put a helio-coil in the Hole and use that to hold the Probe in?

 

i never heard of helio coil until you mentioned it. it looks promising, but what are the changes of the helio coil itself somehow rattling out completely and falls into the manifold itself :x

 

I had a gen 1 eclipse with an Autometer EGT. I welded the bung to the manifold with a mig welder...(2-3 tacks with good penetration), when I used work in a muffler shop. It held great, with no problems. You just have to make sure to penetrate well into the cast iron. You will be fine...

 

your manifold didnt crack or anything over time? what shop was this at? lol. thnx

 

just go with the next bigger size NPT fitting.....from 1/8X1/8NPT ->1/8X3/16NPT or even 1/8X1/4NPT although 1/4 is getting a bit big......www.swagelok.com