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New oil cooler fitting allows -10 SS hoses and OEM cooler

Burning oil

Burning oil

LeroyDiesel.com
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Ive been working on this one for a long time and very excited to release it.
These are a very special fitting and are a perfect fit, made specificaly for this application the 6.5 diesel with engine oil cooler. (might fit the Dmax to?). I have both style fittings for the smaller OEM cooler fitting and the HO oil cooler with the larger fitting. (Someone please clairify for me the cut off year/application).
They are made from stainless steel, have the proper metric oring seal by standard -10jic/flare. Nice thing about these is it eleminates the need for an expensive swivle fitting.
I took a bunch of pictures of an install I will post more pic of that if ya'll are interested?

I have made them in two styles for each size. One has a metric by jic. The other is metric by 1/2" fm pipe thread. This pic shows one of each.
oil cooler fitting -10 008.jpg

This is the smaller size (one of each) these are the ones I installed on my 94.
oil cooler fitting -10 009.jpg
 
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More pics would be great. I can't figure how they replace the swivel 45. I'd like to not have to buy a cooler when the one I have is fine.
 
The changeover was mid year 97 when they went to the 506 block. The 141 block in early 97 still had the smaller 1/2" lines on it.
 
Can't you use the larger lines on 96 and down?

Am I understanding this application?

If not please explain.........splain lucy...
 
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bk95td said:
More pics would be great. I can't figure how they replace the swivel 45. I'd like to not have to buy a cooler when the one I have is fine.
Click to expand...
I agree, its always nagged at me to throw away a good cooler just because the hoses leak. I will explane how you can avoid the swivle fittings below.

Start by removing grill.
oil cooler fitting -10 014.jpg
Very important to use a back up wrench when loosening the lines. Should be a 1" and a 3/4" wrench. Remove both hoses from cooler. Be ready to catch oil in a drain pan.
oil cooler fitting -10 015.jpg
I hung mine from the bumper to drain all the oil out of it. Took about 30 minutes to drain real good.
oil cooler fitting -10 016.jpg
Not a very good picture, but it shows the fittings installed. This is the step that will allow the 45* swivle to be obsolete.
All you do is install the metric x 1/2" fm pipe fitting temporarily on the side closest to driver side (right side as you look at cooler on truck).(In the picture the cooler is facing down so the adaptor fitting w/ 1/2" pipe is on the left, Sorry for the confusion).
Mark with a marker where you want the brass 45* fitting oriented, just put a line on the fitting. I suggest angled slighty forward so the -10 hose will clear the core support. (see pic below)
Now remove the right side fitting and take it and the 45* brass fitting to the work table.
With teflon tape applied tighten the 45* fitting into the adapter fitting until its tight and it lines up with the mark you made.
Now it can be reinstalled on the cooler.
oil cooler fitting -10 017.jpg
Pic shows to keep tape back away from ends of fitting. Very important.
oil cooler fitting -10 018.jpg
In this pic you see the slightly forward angle mentioned above. Once both fittings are installed you can reattach cooler to core support brackets.
oil cooler fitting -10 021.jpg
Next the OEM block fittings are removed. I don't bother tring to remove the clips anymore they are a PITA. Just take the 1" wrench and unscrew them from the block. (Be ready for more oil leakage from the hoses.)
oil cooler fitting -10 022.jpg

More to come in a minute.
 
Brooklyn Tow said:
Can't you use the larger lines on 96 and down?

Am I understanding this application?

If not please explain.........splain lucy...
Click to expand...

Yes you can.

I want to confirm the year GM went to the larger HO cooler/hoses because the fittings are larger on those.
I think the cut off year was 96/97. So you will need to know what you have before ordering.
 
This install was on a 94 with 2wd, 3/8" block fittings. The exhaust manifold would hit the fitting, so if you run into this you will need to clear some metal off the manifold. I was able to get a recipricating saw in there and cut a "V" in the offending area. Just be carefull and do not cut through the manifold. You might try a different tool like a file, grinder...or ? (note: this is the only truck so far that I've had to do this on. The rest have fit with no problem). On 4x4 trucks you will want to remove or move the drive shaft and remove the 4x4 oil filter adapter.
oil cooler fitting -10 025.jpg
Once it was cut away The fitting fits nicely. Tighten it and point it slightly down. Now attach the hoses to the fittings. The hoses will have a "memory" of the curve they have been in for the last few weeks in the box. Straighten them out and run them from the front, over the xmember but, under the motor mount (see pic below). be carefull not to drag the hose fitting or dirt and other crap will get into the threads. It would be a good idea to cover them. Now you can bend the hose to match the angle of the block fitting. Attach the hose to the fitting that is highest up and furthest forward FIRST.
Take your time, do not bugger up the threads. Get a couple thread started by hand then with the 1" wrench thighten them.
oil cooler fitting -10 026.jpg
Taped up with tape back from the end again. Do not get the tape over the end where it can get into the oiling system.
oil cooler fitting -10 023.jpg
Once you have the hoses installed on the block fittings you can attach other end of the hoses to the cooler. Use a back up wrench anytime you are tightening or loosening the cooler.
oil cooler fitting -10 027.jpg
Zip tie/secure hoses away from moving parts.
oil cooler fitting -10 029.jpg

oil cooler fitting -10 028.jpg
While I was in there I changed the oil and filter also put one of the spring loaded drain valves on it. Will make it easy to take samples.

Well that is about it. Thanks as always
Leroy
oil cooler fitting -10 030.jpg
 
THEFERMANATOR said:
The changeover was mid year 97 when they went to the 506 block. The 141 block in early 97 still had the smaller 1/2" lines on it.
Click to expand...

OK thanks,
Anyone know if the HO cooler has the same size fittings as the Dmax cooler? Do the Dmax trucks even have a issue with leaky hoses?
 
Getting the orientation of the 45 right was the problem that brought on the swivel fitting. The coming straight off the left side requires cutting a hole in the air deflector instead of using the factory hole from my experience. Not a big deal, but with the swivel fittings the hoses go right to the factory hole.
IMG_1859_1.JPGIMG_1860_2.JPG
 
The Burban is missing the air deflector so I forgot about that being a problem. Looks like I would just have to include the same fitting for the left side also in that case.
Thanks Barry.
 
Minnor chang/update

Thanks Barry for catching that. Anyway the fix is simple I just added to the left side the same fitting as the right. Install it with the same procedure as above.

My Burban is missing the whole plastic deflector piece that bolts to the bottom of the core support. Barry you have one for sale?

oil cooler adapter for oem cooler 002.jpg
 
Burning oil said:
OK thanks,
Anyone know if the HO cooler has the same size fittings as the Dmax cooler? Do the Dmax trucks even have a issue with leaky hoses?
Click to expand...

The DURAMAX doesn't use an external engine oil cooler, it is integrated into the cooling system between teh water pump and teh block at the oil filter. The trans cooler lines do leak though, but there are a few kits out there for them already.
 
I got the little inserts and the right side. The right side was broken when the bumper got pushed back.
LMCtruck.com Baffle-scoop part number 33-2875 $49.95

Double check that but it was the receipt I found for the right time.
 
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