That hose is trashed, there is a tear on it.

 

For my elevate charge pipe tubes I used a hair dryer to warm them up to the point of them being super malleable, I would not recommend using any grease or lube as you'll have a hell of a time getting everything tightened up and dry.

For my throttle body housing I used the stock tubing and used a box cutter to bore out the inside and plenty of heat!

Also an extra set of hands to tighten the clamp while you use both hands to muscle the tubing helps too, good luck!

Ps also having a flat head screwdriver helps to pry the tube onto the fitting helps.



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It's not trashed, the tear is only skin-deep, there are 5 more layers below it. But I'm not happy about having to have done it.

I used an actual heat gun, not a hair dryer, it made the hose quite hot and still no movement. And also used a hose tool, a kind of slim angled pointy thing that slides along the hard pipe and helps walk the joint. Also did zip.

Thing is, this is super-high quality tubing. It's just too damn small. Really disappointed. I do have a replacement stock hose, I guess that's going on after all.

 

I'd replace it with a new one at this point.

 

It's moot anyway because the thing just plain doesn't go. To make one last effort, I brought it inside, swirled it in boiling water for ~2 minutes (which means nothing to the silicone material, duh) and attempted to jam it on the fitting, wet. Made it about 1/4". It's simply uninstallable.

I do have the lower hose on the thermostat, and may give it a go to the radiator. Then I'll have two out of three, and I'll install my new stock upper (tee) hose for now.

I'm kind of pissed, honestly. Has anyone had success with Do88 coolant lines?

 

This is disappointing since I have a set of these I have yet to install.

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Back in my diesel days, I was under the same impression. Redoing the couplers for the Turbo and IC, they'd make it on an inch and then stop. no amount of screwdrivers or lifting the edges helped. Full bodyweight of mine going into them and they didn't budge. Granted they are designed to hold the 35PSI stock boost or more if you are upgrading to aftermarket tuning, so I knew they were tough and that the fit would be tough.

Finally, I decided to use some windex on the metal and the inside of the tube. I stretched the openings out by hand first, alternating between rolling it in an oval in my hands and stretching it outward with both hands. About 15 minutes of doing this alternating between them, it was significantly softer and more stretchable, and then soaking all contacting parts with windex spray bottle. Popped on without an issue, was still tough but able to slide without much more effort than I was exerting before. I am waiting for a leak in mine to get a new radiator, condenser, frame and the coolant lines all in one go. Good luck!

 

I got mine on. I used petroleum jelly to help slip them on. It was very hard still.

The only one I had a ton of trouble with is the one right at the T. I used a screwdriver to help there.

They have been on for at least a couple thousand miles sp far with no issues

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I'm going to try again today. Softening the ends by rolling them between the bench and a 2x4 is a good idea. And I'll use more lubrication.

 

 

Well, success. I got all three main hoses installed, with difficulty. These hoses are by no means a casual install. I'm not sure I can recommend them, overall

I softened the ends by rolling them with a short piece of 2x4. The silicone became more pliable, but was no more willing to go on. So I used a pair of external snap-ring pliers to expand the ends from the inside. That helped more. Then some soapy water. They still put up a huge fight.

I'm happy with the basic quality/strength of the material, but I'm really disappointed in the undersize. There's no reason at all why a set of cooling hoses need to be this damn tight. I'm also annoyed they couldn't see a way to include one extra clamp so you can install the upper bleed line to the engine fitting.

Finally, I'm annoyed to have found this plastic band inside the new upper hose. I sincerely hope there isn't another in there.

Good news is, the old tee hadn't leaked...yet!

 

Well, success. I got all three main hoses installed, with difficulty. These hoses are by no means a casual install. I'm not sure I can recommend them, overall

I softened the ends by rolling them with a short piece of 2x4. The silicone became more pliable, but was no more willing to go on. So I used a pair of external snap-ring pliers to expand the ends from the inside. That helped more. Then some soapy water. They still put up a huge fight.

I'm happy with the basic quality/strength of the material, but I'm really disappointed in the undersize. There's no reason at all why a set of cooling hoses need to be this damn tight. I'm also annoyed they couldn't see a way to include one extra clamp so you can install the upper bleed line to the engine fitting.

Finally, I'm annoyed to have found this plastic band inside the new upper hose. I sincerely hope there isn't another in there.

View attachment 42775

Good news is, the old tee hadn't leaked...yet!

View attachment 42777

Nice ! At least its on and u shouldn't have to worry about it.

Did u manage to get the two that run from the reservoir ?

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BTW, it is interesting that the bleeder hose from the head has two restrictors in it.The factory hose has them literally inserted deep in the tubing, the Do88 implements them with smaller holes on one side of the two unions. I was wondering why they shipped three pieces of tubing until I realized this.

 

Did you go regular coolant or Evans Waterless?

 

I'm using Pentosin Pentofrost NF. Have not installed it yet owing to the busted radiator drain thingy (another thread), which arrives tomorrow.

 

I had the same problem, on different fittings. I got the automatic kit, so it had the 2 extra hoses on the main hose. Everything fit except the lower trans cooler hose. I eventually took a dremel sanding drum and enlarged the tubing on the inside so that it would barely go on. It was extremely tight. No leaks so far.

The only other hose I had a problem with was the reservoir hose to the back of the engine, neither end would go on, even after significant grinding away of the silicone inside. I was angry enough that I just bought a new factory hose there.

It felt to me that they got extra reinforcing cord in the end that prevented it from expanding at all. It was like putting on a sock that can't stretch. Very very frustrating, especially after paying a premium price.

 

+1 on the do88 hoses being a PITA to get on. I purchased the kit for the automatic direct from them. stretching/rolling the ends and using water based tire mount lube did the trick.
The worst one was the hose from the bottom of the coolant reservoir, couldn't get it on at all so I said F it and put the stock one on too.

 

A quick followup. I heard back from do88 via VivaPerformance. They report that "nobody has reported this problem" and said that they recommend using WD40 to lubricate the fittings when installing.

I still think these coolant hoses are undersized.

 

That is interesting. WD40 is noninteractive with silicone but extremely problematic with rubber. Given that not all orings in our systems are viton its rather shocking that they say this. At least soap and water can be flushed out easily...WD40 would require soap and water to do so.