Om617 oil cooler/hose male/female thread size? - PeachParts Mercedes-Benz Forum

warmblood58 · #1 10-01-2009, 06:10 PM

Hi, I want to create a oil cooler drain adaptor so that I do not have to loosen my lower oil cooler hose each time I do an oil change to drain oc. Does anyone know what the male/female thread sizes are for the hose threads on the oil cooler? Thanks!

Sev · #2 10-01-2009, 06:26 PM

huh, that sounds like an idea. although, since the lower oil cooler hose isn't at the bottom of the oil cooler, adding an adapter won't really allow you to remove all the oil in the cooler. the only way to do that would be to remove the oil lines and the cooler. so that means each time you do an oil change, just a little bit of the old oil will still remain in the system, which is virtually the case anyway anytime a regular oil change is done

jt20 · #3 10-01-2009, 06:29 PM

you might be better off detaching the cooler from the radiator and raising it above the filter housing after you have drained the filter housing.

..if it is that much of a concern.

tangofox007 · #4 10-01-2009, 06:39 PM

Quote:

Originally Posted by Sev

since the lower oil cooler hose isn't at the bottom of the oil cooler, adding an adapter won't really allow you to remove all the oil in the cooler.

On a percentage basis, how much oil do you think resides below the lower hose nipple?

Quote:

Originally Posted by jt20

you might be better off detaching the cooler from the radiator and raising it above the filter housing after you have drained the filter housing.

The oil thermostat might not cooperate with that plan.

Diesel911 · #5 10-01-2009, 08:40 PM

Quote:

Originally Posted by tangofox007

On a percentage basis, how much oil do you think resides below the lower hose nipple?

The oil thermostat might not cooperate with that plan.

How about a compromise.
Get the Oil hot enough to open the Oil Filter Thermostat and drive the front end up on some very steep Ramps (custom made)

Give it about 30 min or so to drain back.

Sev · #6 10-01-2009, 09:08 PM

Quote:

Originally Posted by tangofox007

On a percentage basis, how much oil do you think resides below the lower hose nipple?

The oil thermostat might not cooperate with that plan.

i've measured the amount of oil below the nipple in relation to how much was removed during draining it the regular way, and it's exactly .07626%

pawoSD · #7 10-01-2009, 10:38 PM

Quote:

Originally Posted by warmblood58

Hi, I want to create a oil cooler drain adaptor so that I do not have to loosen my lower oil cooler hose each time I do an oil change to drain oc. Does anyone know what the male/female thread sizes are for the hose threads on the oil cooler? Thanks!

You drain your oil cooler when doing an oil change? There is no point in doing that....there is only a very small amount of oil left in there, and it won't hurt anything. MB would have put a drain plug on the cooler if they felt it was necessary.

Diesel911 · #8 10-01-2009, 11:34 PM

Quote:

Originally Posted by pawoSD

You drain your oil cooler when doing an oil change? There is no point in doing that....there is only a very small amount of oil left in there, and it won't hurt anything. MB would have put a drain plug on the cooler if they felt it was necessary.

I read one post in this Forum over a year ago on a 220 or 240D that had a Drain Plug at the Bottom of the Oil Cooler.

jt20 · #9 10-01-2009, 11:54 PM

I have a 240D oil cooler with both hoses on the bottom where there is a bolt-on attachment that comes off very easily.... I don't know if its intended as a drain, but could certainly function as one.

Or are you saying there is a model with a drain for that purpose?

jt20 · #10 10-01-2009, 11:57 PM

Quote:

Originally Posted by tangofox007

The oil thermostat might not cooperate with that plan.

smart.

I just checked a spare filter housing and it looks like the oil might get into the base of the housing, but certainly not return to the case.

I can take pics if someone really begs.

jt20 · #11 10-01-2009, 11:59 PM

Quote:

Originally Posted by pawoSD

You drain your oil cooler when doing an oil change? There is no point in doing that....there is only a very small amount of oil left in there, and it won't hurt anything. MB would have put a drain plug on the cooler if they felt it was necessary.

While I do mostly agree, if you are changing oil types you may want to remove as much as possible. You know how anal we are here, c'mon.

pawoSD · #12 10-02-2009, 12:28 AM

Quote:

Originally Posted by jt20

While I do mostly agree, if you are changing oil types you may want to remove as much as possible. You know how anal we are here, c'mon.

I consider myself quite anal, but I don't think that 1/5 of a quart of oil mixed in with 6.5+ other quarts will make much difference......

LMN- · #13 10-02-2009, 03:11 AM

Risking stripping the threads every oil change isn't worth a fraction of a quart of oil.

pawoSD · #14 10-02-2009, 07:46 AM

Quote:

Originally Posted by LMN-

Risking stripping the threads every oil change isn't worth a fraction of a quart of oil.

Exactly.

Especially in the salty regions. Messing with the oil cooler is something I like to do as rarely as possible.

tangofox007 · #15 10-02-2009, 09:02 AM

Quote:

Originally Posted by LMN-

Risking stripping the threads every oil change isn't worth a fraction of a quart of oil.

Do you reckon that might be why the OP was interested in installing a drain?

Maybe that's what he was thinking when he said, "...so that I do not have to loosen my lower oil cooler hose each time I do an oil change..."