sleddineinar
VIP Member
Thanks Al, I'm at work right now. I left the coolant plugs out to drain everything. So I'll clean it like you said and try brazing it tomorrow.
Front Heat Exchanger Repair
- Thread starter sleddineinar
- Start date
sleddineinar
VIP Member
alswagg said:
Hey Al, Johnson's sent me a tub of aluminum brazing flux, it's a powder, how do you apply it?
1. Clean area to braze with a SST brush
2. Apply the Flux to both parts to be brazed together, use a small brush, usually called an acid brush, can be bought at Ace hardware
3. Heat the exchanger with torch tip at an angle.
4. When you start to see white smoke and the flame on the torch turns orange, this is when the material is ready to braze.
5. Apply alumaweld to area to be filled, keep heat on slightly, the brazing solder will naturally fill the area.
6. While the Alumaweld is still molten, wipe clean, check your job, fill more if needed.
7. Clean all excess flux with water, after bond cools
This is similar to soldering copper piping, you are just brazing aluminum. Before you know it you will be repairing all kinds of aluminum parts. remember to build the protectors and install so this doesn't happen again. Good Luck Al
2. Apply the Flux to both parts to be brazed together, use a small brush, usually called an acid brush, can be bought at Ace hardware
3. Heat the exchanger with torch tip at an angle.
4. When you start to see white smoke and the flame on the torch turns orange, this is when the material is ready to braze.
5. Apply alumaweld to area to be filled, keep heat on slightly, the brazing solder will naturally fill the area.
6. While the Alumaweld is still molten, wipe clean, check your job, fill more if needed.
7. Clean all excess flux with water, after bond cools
This is similar to soldering copper piping, you are just brazing aluminum. Before you know it you will be repairing all kinds of aluminum parts. remember to build the protectors and install so this doesn't happen again. Good Luck Al
sleddineinar
VIP Member
alswagg said:
OK, but the flux is a powder, do I wet it, to apply it?
You can add a minimal amount of water to make it "pasty" Again note minimal amount. the flux is a cleaning and bonding agent for the aluminum solder.
sleddineinar
VIP Member
THANK YOU AL!
I FINALLY fixed my heat exchanger! I AM SO DAM EXCITED! The brazing worked! I had to use a softer rod, than what Johnson's sold me (I found it at Home Depot) Benzomatic's Aluminum Brazing Rod it has a lower melting point (700-750°F). Always, here's a couple of pictures. I had to flip the sled up and down every day and blow it out with air to get as much antifreeze out as I could, and then flipped it completely over. It took 45min to heat it up with a propane torch tipped with a turbo tip, before the rod would flow.
I FINALLY fixed my heat exchanger! I AM SO DAM EXCITED! The brazing worked! I had to use a softer rod, than what Johnson's sold me (I found it at Home Depot) Benzomatic's Aluminum Brazing Rod it has a lower melting point (700-750°F). Always, here's a couple of pictures. I had to flip the sled up and down every day and blow it out with air to get as much antifreeze out as I could, and then flipped it completely over. It took 45min to heat it up with a propane torch tipped with a turbo tip, before the rod would flow.
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sleddineinar
VIP Member
P.S. When I used the benzomatic rod, I did not use any flux. I just used a stainless steel brush and cleaned it really good. In fact when I was heating up the spot, after all the steam quit coming out I brushed it again really good.
kl-ze
New member
glad you fixed it!
same thing happened on my gsx600 sdi
but all i did is patched it up with a 2 step epoxy for radiators and aluminum material. first I cleaned everything with alcohol or brake cleaner, then
once you mix the 2 parts together; white and black, apply and let it dry, it becomes hard as a rock! impossible to take of with ease!!
been a little over a year now, so far so good....
same thing happened on my gsx600 sdi
but all i did is patched it up with a 2 step epoxy for radiators and aluminum material. first I cleaned everything with alcohol or brake cleaner, then
once you mix the 2 parts together; white and black, apply and let it dry, it becomes hard as a rock! impossible to take of with ease!!
been a little over a year now, so far so good....
Adam700sxr
New member
700sxr skip when run hard
01 700 sxr will cut uot when run hard. new plugs, coils. clean carbs and fuel pump. Yamaha tech says not the stator or cdi. ??????? Cat and skidoo tech's say stator.
01 700 sxr will cut uot when run hard. new plugs, coils. clean carbs and fuel pump. Yamaha tech says not the stator or cdi. ??????? Cat and skidoo tech's say stator.
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Glad to hear the repair worked, I take it the repair was on the bottom. Did you say you used benzomatic? I will try to pick some up and try it. I usually use a very fine tip on my torch, sorry you had some issues with the heating up the aluminum. Doesn't it feel good to repair something most believe unrepairable. Al
sleddineinar
VIP Member
I totally agree, about the repair. I love when something works well!
Andy
Andy
alswagg said:
Not sure on this type of Flux, but for most powder flux you simply heat the rod and dip it in the flux. The flux should stick to the rod.
I realize you have completed your repair but thought I would suggest this to see if others have any input.
I realize you have completed your repair but thought I would suggest this to see if others have any input.
I usually heat up the aluminum a little, brush on the flux when the color of the flame changes, this is an indicator the base aluminum is at correct temp to start brazing. I will try dipping rod in powder and see how it works. Thanks Ding. Al
sleddineinar
VIP Member
When I have some more time (HA!), I'm going to practice with this rod & flux. I'll try that and see how it works & what works best.