EGT Bung
#1
EGT Bung
I was just about to take my exhaust manifold to weld bungs for pre-turbo EGT sensors before tuning. I got the turbo off (I have single) and noticed that the manifold already has bungs welded on it. They look like small pieces of pipe welded on, and have threads on the inside (i'm guessing 1/8 NPT).
I was expecting these to actually be blocked off and have an open whole inside to get exhaust gas (Like an O2 sensor). BUT, they do not actually open into the manifold, I hooked a hose to one and blew, and its sealed. Am I just stupid and EGT sensors don't need to actually test the exhaust gas itself and being welded to the steel manifold is good enough? It was obviously used as is before, but I just figured the EGT sensors would be in the gas stream like an O2 sensor.
What do you think?
I was expecting these to actually be blocked off and have an open whole inside to get exhaust gas (Like an O2 sensor). BUT, they do not actually open into the manifold, I hooked a hose to one and blew, and its sealed. Am I just stupid and EGT sensors don't need to actually test the exhaust gas itself and being welded to the steel manifold is good enough? It was obviously used as is before, but I just figured the EGT sensors would be in the gas stream like an O2 sensor.
What do you think?
#6
my PC is crapping out making it hard to get pics on line. since I have the turbo off I'll take off the manifold. The comment about possibly being for a heat shield makes a lot of sense. I have not verified that they are actually NPT. I think i'll just leave them alone and put some real bungs on. Is there a good place to purchase 1/8th NPT bungs? I can't seam to find anything other than standard O2 sensor bungs locally.