Just looking around the engine again, noticed the small tubing running from what looks like the t-stat housing to the middle of the exhaust manifold. Was it some part of the EGR system? I am assuming it isn't critical if it's not part of aftermarket manifolds.

Someone here has to know! Thanks

 

I believe that you are referring to the exhaust back pressure tube and sensor:



It is my understanding that it keeps your turbo from making too much back pressure by moving the vanes.
I have seen a PDI manifold that had the provision for that fitting. But if you are going to an aftermarket turbo, that is not a variable vane, you don't need it.

Scott.

 

Thanks a lot for the pic and info, that is what I was wondering about, odd they run the tube from the manifold all the way up there.

 

The long tube prevents exhaust heat from damaging the sensor.

 

Scott, can you send that engine out here please? J/K
I am looking at one with 67,000KM on it...considering doing some science. Cam, sticks etc.

 

stick with your kabota.... boy.... lol