Yes those parts are replacable, just about everything is. The valve seals cost less than 20 bucks from the dealer, but it takes about 4 to 5 hours to install them, its not very fun.

i'll make a vid tomorrow. Search on youtube other poeple have posted some vids.

No problem.

__________________
1985 300TD Turbo Euro-wagon
1979 280CE 225,200 miles
1985 300D Turbo 264,000 miles
1976 240D 190,000 miles
1979 300TD 220,000

GONE but not forgotten
1976 300D 195,300 miles
1983 300D Turbo 175,000 miles

http://i42.photobucket.com/albums/e3...e485-1-2-1.jpg