The threaded holes are the air reactor [AIR] fitting, an exhaust gas recirculation [ERG] fitting or choke stove. Check out DormanProducts.com. copmagnet95@hotmail.com
It is threaded into the rear exhaust manifold.It is threaded into the rear exhaust manifold.
It's threaded into the front of your exhaust manifold.
It is threaded into the exhaust manifold.
It sounds like you either have a leak at the exhaust manifold or the intake manifold. Most likely is the exhaust.
The first sensor directly behind the drivers side exhaust manifold, it is threaded into the exhaust y-pipe.
oxygen sensors are located in the exhaust, start at the. exhaust manifold and look down. the funny little thing threaded into the pipe with a wire or three will be the sensor your looking for.
Bank 1 sensor 1 would be threaded into the exhaust pipe directly after the exhaust manifold on the drivers side of the engine.
Maybe : a crack in exhaust manifold that closes when hot.
Assuming you have the 4.3 engine, bank 2 sensor 1 would be the O2 sensor threaded into the exhaust pipe directly after the passenger side exhaust manifold.
The exhaust manifold needs to have a gasket in place to help seal the juncture between the manifold and the engine. After the gasket and gasket sealer are in place, tighten the bolts for the exhaust manifold. The exhaust pipe can then be replaced on the new exhaust manifold.
The purpose of the exhaust manifold is to connect the exhaust ports on the cylinder head to the exhaust pipe.
exhaust manifold is where exhaust pipe hooks to engine!