325i Oil Cooler lines, what tool to use...

[silversleeper]

to tight the nuts where the lines meet the block? Also what size is it?

Mine backed out on me spewing oil all over the place. However, I can't seem to get an open end wrench in there to tighten it down. What do you guys use?

[PeaveyBassist]

22mm open end wrench

Will

[fretburnr]

that damn 22mil keeps coming in handy. turn the crank with it, oil cooler lines, hit some haters in the face, you know.

[silversleeper]

wow, a 22mm.. i was expecting 21.

do u guys tighten it from the underneath (bottom)? i can't swing a wrench from the left side (no space) and the right side has very very limited movement.

[jlevie]

The forward most line can be tightned/loosened with an open end wrench or even a crescent. Unfortunately that line is in the way of doing anything with the other line. So if you need to tighten the rear most like take the other one off or use a crows foot.

Note that those lines are o-ring sealed. So good and snug is all that's needed if the o-rings are good.

[DJB]

There is a special size silver colored (probably Viton) o-ring for the oil cooler lines
17-22-2-245-358 o-ring seal, 13.4x1.78mm (-907 size) about $0.75

Verify that an o-ring is actually there. I had (suprisingly minor) leak when one fell off when I was reinstalling a hose.

[nando]

yeah, replace the o-rings and crush washers, or tightening it down won't help anything.