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+--- Thread: Oil cooler stripped threads! (/showthread.php?tid=7309)
Oil cooler stripped threads! - EmJay - 07-14-2016
Help! I was doing a routine oil change and decided to replace my oil cooler hoses as they were leaking pretty bad. I took the two fittings off the filter housing OK, and the lower fitting on the colder no problem. The upper one though was harder to turn though and I found out why. Gotta love it when previous owner cross threads an important connection.
![[Image: IMG_20160714_222009928_zpsi8nqq4l2.jpg]](http://s210.photobucket.com/user/truckmike520/media/Mobile%20Uploads/IMG_20160714_222009928_zpsi8nqq4l2.jpg.html)
So my question, is the fitting in the cooler a serviceable fitting (IE replaceable) or do I need to source another cooler? There are two 300Ds in my PaP weight the coolers in place.
RE: Oil cooler stripped threads! - NZScott - 07-14-2016
I had this same problem recently,
I took the steel fitting out of the oil filter housing on my spare engine and got a machine shop to cut the cooler threads off and tap the hole 18x1.5.
Bingo fixed. My cooler still sitting in the back seat of my toyota since I picked it up though
RE: Oil cooler stripped threads! - EmJay - 07-15-2016
At the threaded fitting in the cooler comes out easily? I was afraid to try and to mess it up worse. Guess I can get just the fitting from a junkyard part then.
RE: Oil cooler stripped threads! - EmJay - 07-15-2016
Ok so I got lucky as hell, it looks worse than it is. I was able to chase the threads with a thread file, and clean the stripped material from the nut. Goes on hand tight easy now. Wondering if I should use antisieze or JB weld. I know the next time that cooler line comes off that fitting probably will need replacing.
RE: Oil cooler stripped threads! - NZScott - 07-16-2016
Ah, well then. Hopefully it holds together...something like that wouldn't hurt
RE: Oil cooler stripped threads! - Greazzer - 07-16-2016
Just get the large sized tap and die kit from Norther Tool and run a die over it. That will clean up the threads.
RE: Oil cooler stripped threads! - EmJay - 07-16-2016
Any chance you know the thread size and pitch? Might be something that I look at the next oil change. I put the car back together today, I used antisieze on all the threads. Everything went on tight and no leaks! Now to figure out my weird vibration issue when/after braking. Keeping an eye on it over the next several days, put ~50 miles on it today without issue.
RE: Oil cooler stripped threads! - Austincarnut - 07-17-2016
(07-16-2016, 10:28 PM)i have spares if you want another cooler EmJay Any chance you know the thread size and pitch? Might be something that I look at the next oil change. I put the car back together today, I used antisieze on all the threads. Everything went on tight and no leaks! Now to figure out my weird vibration issue when/after braking. Keeping an eye on it over the next several days, put ~50 miles on it today without issue.
RE: Oil cooler stripped threads! - EmJay - 07-17-2016
Might be interested for a later date, I believe that I'm set for now.
RE: Oil cooler stripped threads! - MFSuper90 - 07-24-2016
I had aluminium barb fittings welded onto mine, works great. No way the hoses could come off
RE: Oil cooler stripped threads! - EmJay - 07-25-2016
Pleased to say that a few hundred miles later still good on the cooler.
RE: Oil cooler stripped threads! - Greazzer - 07-26-2016
I don't remember, but I will try to figure it out once the heat wave breaks ... my garage is an oven right now.
RE: Oil cooler stripped threads! - EmJay - 07-27-2016
Oh I understand man, it has been 90+ here as well for over 50 days. Glad I have AC in this one
RE: Oil cooler stripped threads! - martureo - 07-28-2016
It's a little late now, but in trying to find material to repair a 603 oil cooler I found this gem.
http://peachparts.com/shopforum/members/jdr01-albums-oil-cooler-nipple-rapair.html
(you'll need to login to see it)
The jist is that apparently Mercedes was aware of the threads stripping and created a solution. Cut off the threads and drill the hex portion of the oil cooler 21/32 for a M18 x 1.50mm tap. Tap the hole and use MBZ p/n 915013-013002 thread replacement adaptor.
I've called my dealer and the price is ~$5 each.
RE: Oil cooler stripped threads! - EmJay - 08-01-2016
Thanks! This is awesome, and now on this forum we have an answer that is easily searched for. Great find!