So I've been searching for a how to for the oil pump pick-up tube o-ring replacement on my 2007 W164 ML350 (M272 V6), with no luck (It needs to be specifically for this engine/chassis setup).
There's plenty of talk about this o-ring, as people are experiencing the rumble/rattle on cold start ups because of it, and even confusing it for chain rattle in some cases.
Now I usually just get stuck in and figure it out, but in this case there are a few important questions I need answered before I begin, since I'll be taking care of a few other items at the same time and don't want to get stuck or revisit any stage (If anyone can answer for both the M272 (V6) and M273 (V8) engines this thread may help more people):
1. Do I need to remove just the lower oil pan, or both lower and upper pans, to access the pick up tube o-ring?
2. Do I actually need to lift the engine to remove the lower/upper oil pan/s? I ask this because someone somewhere mentioned that it's not necessary with the V6. And if you look at it, it does seem like it could just slide out from the front (but you never know how much its obstructed from the inside until you've opened it).
3. If I do need to lift the engine to remove the pan (again, in my case its the V6), can I just access the pick up tube by simply dropping the oil pan and leaving it in place?
4. Anything else worth doing while the oil pan is out?
Thanks a bunch in advance.
There's plenty of talk about this o-ring, as people are experiencing the rumble/rattle on cold start ups because of it, and even confusing it for chain rattle in some cases.
Now I usually just get stuck in and figure it out, but in this case there are a few important questions I need answered before I begin, since I'll be taking care of a few other items at the same time and don't want to get stuck or revisit any stage (If anyone can answer for both the M272 (V6) and M273 (V8) engines this thread may help more people):
1. Do I need to remove just the lower oil pan, or both lower and upper pans, to access the pick up tube o-ring?
2. Do I actually need to lift the engine to remove the lower/upper oil pan/s? I ask this because someone somewhere mentioned that it's not necessary with the V6. And if you look at it, it does seem like it could just slide out from the front (but you never know how much its obstructed from the inside until you've opened it).
3. If I do need to lift the engine to remove the pan (again, in my case its the V6), can I just access the pick up tube by simply dropping the oil pan and leaving it in place?
4. Anything else worth doing while the oil pan is out?
Thanks a bunch in advance.
