:beer: Maybe this has been going on for a while, but I never noticed. I just had the radiator,oil cooler lines, Tranny cooler lines, and the tranny cooler replaced in my 92 Rover Classic. On the ride home from the mechanics garage I pushed the 3.9 pretty hard to really check out the new cooling parts. The ride concluded with a long huge uphill ,including my long snowcovered driveway. When I opened the hood to inspect the new parts I noticed that both exhaust manifolds were glowing hot. I mean they were bright orange!! The cooling system seems fine but the service engine light is on. The vehicle has 160,000 mileage. About 3 months ago a hole on top of the center muffler developed to the point of muffler replacement. The 3.9 has lost a step or two in the last 3 or 4 months. Could the catylitic converters be plugging?? My mechanic states the service engine light is not exhaust related, he says the check engine light covers bad exhaust. ?? Is exhaust manifold glow normal?? The one manifold is only 1 yr old, it would be nice not to warp a new part.ANY THOUGHTS?? :beer: