Truck repair shop dropped a new Workhorse engine (Jasper) in my 2000 Itaska Suncruiser last fall. First trip in March 22 Exhaust gaskets started failing at about 1200 miles. Ended up getting very loud at 1500 miles and returned to be fixed/reattached. Engine ran better than ever.! Second trip all was fine then they started leaking (making noise) at about 700 miles. Had them replaced on the road. Third trip they started failing at 500 miles, not very noisy yet but getting there. Going in today to have Donut Gaskets direct from GM put in. None of this should be happening with a new engine/Gaskets/Bolts. Also nothing is loose (bolts) according to the mechanic, so it's the gaskets? Anyone else experience this?