My Transalp 700 is running hot, any ideas why?

[Diesel Dave]

There is a non-water coolant used in classic car circles, it doesn't pressurise the system, also a product called 'Water Wetter' that used to be popular with race builders.


https://www.youtube.com/watch?v=t7PykrgzWPQ

[George]

There is a non-water coolant used in classic car circles, it doesn't pressurise the system, also a product called 'Water Wetter' that used to be popular with race builders.


https://www.youtube.com/watch?v=t7PykrgzWPQ

This is cool!

[Radagast]

To each his own... I said that about the citric acid because there is a lot of people that only like the original equipment AND ONLY the original equipment, no other, neither the oem part nor new ones. Then if George was one of them, then we will try to save that rad to any cost...


And if George doesn't, well, he will recore that! Or buy another new one.

Regards!!

[George]

To each his own... I said that about the citric acid because there is a lot of people that only like the original equipment AND ONLY the original equipment, no other, neither the oem part nor new ones. Then if George was one of them, then we will try to save that rad to any cost...


And if George doesn't, well, he will recore that! Or buy another new one.

Regards!!

I like the original equipment but not to that extent to not try and fix what I have. It's just time consuming to do stuff without any result and most of the things I've done already, weren't cheap either. I would be happy to pay for this service to be done by a professional. I will try the acid thing before anything else since it's cheap cheap. Will keep you posted.

[George]

Right, had to leave the Africa Twin with the dealer and went straight home yesterday to work on the Transalp. Stripped the whole thing, got the radiator out, filled it with brick acid, left it for 30 min, flushed it with a lot of hot water, tapped it with a spanner and things were coming out of it faster like that (i might need to get it ultrasonically cleaned?) and repeated the process again with acid and flushing it with a lot of water. So total time spent with acid in the rad, 1h.

It looked promising and I've put it back together before going to bed to be able to use the bike today.

This is how my back yard looked like this morning:



Result? 79-80°C on the A46. Got to the Warwick Bypass (5-8 miles down the A46) and there is a traffic light. Went to 85°C at the traffic light, started going and got onto the M40. Went down to 83. Never got back to 80-79°C after that. It got hotter as I hit the slow traffic approaching work. The fan works half of the time it used to before the brick acid treatment to get the coolant temperature from 103 to 100-98°C.

It is better, but not as good as it used to be when ”new”.

There is still white deposit in the rad that's visible. The surface of the cooling area is porous because of this.

The brick acid is good in breaking this deposit, but I do not know why it doesn't kill it completely. If I could boil the brick acid, it would do the trick.

How do I neutralise the acid? Is a lot of hot water enough? Should I be concerned?

Bottom of line is that I need to strip the bike again and do whatever I do... again. It's improving but not as much as my backyard pavement tiles would suggest.

[Diesel Dave]

If it's an ally radiator and you have got away with using acid so far.......don't push your luck!

[Newtsalad]

Fernox do a descaler for hotwater systems, don't know if this info is useful?

http://www.fernox.com/problem+solving/h ... ter+system

[ally]

bicarb?

[Newtsalad]

I have some citric acid here, I bought to try cleaning off rust.

I just mixed some in a tinfoil cup, and very surprised to see it doesn't affect the aluminium at all, but will eat limescale I dropped into it. It hasn't even tarnished the tin foil, I would have thought it would blacken it at least.

[George]

If it's an ally radiator and you have got away with using acid so far.......don't push your luck!

It is aluminium for sure.