My cooler is leaking and its been a while since I had to take one off a 7 and cant remember the size.

I know what size the threads are but what size are the shoulders on the fittings? I cannot get any of my high dollar wrenches to fit on them lol. Some are too wide but they don't even seem to wanna slide on the hose side or the adapter in the cooler.

That being said does anyone have some lines for sale? Id rather support a fellow member before I order some or build some new ones.

 

I think they're 24mm or 26mm. I have 2 wrenches of that size in my cabinet that I think were only purchased to do this job, as the only other thing on the car that they fit are the front radius rod nuts...

I have used a large adjustable box-end wrench for the fitting side - and just know that you want to replace those little copper washers in there before you tighten everything more than it needs to be. The leading cause of -SE oil cooler line leaks is due to overtightening from someone trying to fix a leaking oil cooler line. No, I'm not kidding. Read that again.

The trick I use is to install the fittings finger tight, give them about 1/4 turn with wrenches and then start the car out in the street with the front jacked up. Expect it to leak. Once running and the bypass valve is open flowing oil through the cooler, gently and gradually turn the fittings until it JUST STOPS LEAKING. No further. No more.

Clean it all up, take it for a spin, and then look for any other signs of leakage. If none, leave them alone. Overtightening causes hairline cracks that get worse with age and vibration, eventually leading to bigger oil leaks. HTH,

 

The only wrenches I have that size are Snap-On and im not grinding them down. Ill run to Sears or Habit Freight and grab some cheapies.