my 745li 2003 crossover tube and water pump is leaking. they want over 2 grand to fix. Then my mechanic says the water/antifreeze went into the spark splugs because five spark plugs are clean and one is dirty. DO I need a new egine? can i just get the crossover tube aftermaket part and fix the water pump? Should i get rid of the car? it has 92,000 miles on it. thanx im getting another opinion. tne mechanic wants my car for 6000. so i can pay off my car note. I don't know want to do. I guess he wants to profit from it.