2001 Lesabre Exhaust smell comimg in A/C vents when idling. No leak was found with smoke machine, air pressure and soap up the exhaust etc. So desided to remove rear (fire wall side ) exhaust manifold, no cracks, or leaks found. Reassembled started car hear an exhaust leak similar to a valve tape until car warms aprox 1 min. Noise goes away and can only hear leak upon acceleration. Removed manifold again scotch brighted all metal surfaces, replaced all donuts, gaskets, cross over pipe, sealer around EGR tube etc. Condition still persist any idead?

 

my ser 1's came factory with no em gasket. idk if the 01 had one or not, but just an idea.

 

</>problem was tube from rear manifold to the EGR valve. $50.00 part. </>Edited by: sdsdsd