02 Jetta TDI and I took off the EGR and cleaned it out. I put it back together as it was and notice a groove where the EGR mates with the manifold but no O ring. Is there supposed to be an O ring there or special gasket. I did not remember if there was a gasket on the manifold.
I was thinking I may have a boost leak?
I was thinking I may have a boost leak?