Adhesive for nylon in radiator bottom

[rScotty]

Is it nylon? How do you tell? Are there different types of Nylon?

 

[paulsharvey]

Is it nylon? How do you tell? Are there different types of Nylon?

Tomorrow I'll try to cut a sample. Everything I've seen suggest the Vast majority of the tanks are Nylon 6-6 or 66, it seems like different sites refer to it different.

 

[mllud]

Make sure you rough the surface with a small burr. Texture will help the bond stick. I can't suggest a material. But I would fill that into a gusset bond. Applying JB weld thin doesn't work well.
That is a high stress point. It's almost broke off. I don't know if its thick enough to remove the nipple and tap it with NTP tap and screw in a nipple.
Even if you only had a thread or two all the way around the diameter holding it could be stronger than just filling a crack.
Then fill with epoxy or plastic weld for stiffening as suggested. I can't think of a fitting that would replace the nipple.

Whatever you do after you clamp your hose put a strain relief on your hose so its not getting pulled to the side.
Maybe a guard also.
Find a plastic welding group or maybe the RC crowd.

 

[number two]

Rapid-Fix.
Google it.
Good Luck!

 

[mllud]

I don't know if it could be PVC.

 

[5030]

Are you sure it's not molded structural structural fiber? The tanks on my Kubota's are. I'm with everyone else, just replace it. If it fails, you could very well lunch the engine.

 

[bearthebruce]

My 2 cents... the problem with nylon is that with age, the water in the material evaporates leaving a brittle material. Once it cracks and fails, it continues to crack and fail.

Learned all this the hard way with nylon parts used in our diagnostic tools. Some of our nylon parts would just break apart. We found that the region in which it used, the temps at which it used, and so on all had an effect. Nylon's flexibility and durability do change with environmental conditions.

I am with all those that say, replace. Your repair may hold for awhile but it is going to fail again. Will you be out in the field/woods when a major fail occurs? Why risk it?

 

[pmsmechanic]

Find out the part number for the radiator and google it. I use the format "xxxxxx Kioti" or "xxxxxx radiator" and usually get good results. If you come up with alternate/updated part numbers, make sure you google those too. Sometimes that gives better results than the original part number. If you can find an after market replacement I'm thinking the price will be around $200. That's my guess. Good luck.

 

[sandman2234]

If you decide to repair it, and want to add a very fine mesh stainless steel to the epoxy, let me know and I will give you some. I had to buy a huge sheet for a project that used a 1 inch square, and I have a lot left over!
David from jax

 

[5030]

Again, you sure it's nylon and not extruded structural fiber? I do know that Modine (who makes a ton of radiators for all sorts of applications) uses structural fiber for their upper and lower tanks on rads today and the tanks on their rads are sonically welded to the aluminum heat exchangers are cannot be replaced. Even oil pans on commercial diesel engines today are structural fiber, pressure die cast.

Sadly, the days of copper alloy rad cores and upper and lower tanks are gone and are in reality better because they can actually be repaired and re-cored. The new rads cannot be, so replacement is the only option.