There are several common oil leak sources on these 617 series diesels:
1. lower oil pan gasket
2. oil filter housing to block gasket
3. turbo oil tube O-ring leak
4. front crank oil seal
5. valve cover gasket leak - usually corrected when gasket is replaced when valves are adjusted
I have not replaced my leaky oil filter housing gasket yet, but I hear that it is an annoying job. Mercedessource.com sells the gasket with instructions on how to do it as painlessly as possible. The guy is not cheap but his instructions are usually good and help you avoid unnecessary pitfalls. Worth extra $ 15 IMHO.
Another nuisance is replacing the front crank seal. From what I read, you need some kind of special home made tool for this job, or you will damage the seal during installation.
1. lower oil pan gasket
2. oil filter housing to block gasket
3. turbo oil tube O-ring leak
4. front crank oil seal
5. valve cover gasket leak - usually corrected when gasket is replaced when valves are adjusted
I have not replaced my leaky oil filter housing gasket yet, but I hear that it is an annoying job. Mercedessource.com sells the gasket with instructions on how to do it as painlessly as possible. The guy is not cheap but his instructions are usually good and help you avoid unnecessary pitfalls. Worth extra $ 15 IMHO.
Another nuisance is replacing the front crank seal. From what I read, you need some kind of special home made tool for this job, or you will damage the seal during installation.
