Heater: 850: - Radweld - why you should never use it!

GMC · Nov 15th, 2015, 21:15

Some of you may recall my various posts regarding the total lack of heat in my '95 T-5R. To recap, since buying the car in September 14, I've had no heat whatsoever. Along the way, I've replaced the heating matrix (was leaking), the radiator (also leaking), the water pump (was doing the timing belt anyway & the thermostat. But still, there was no heat whatsoever!

Anyway, after replacing all the hardware and still not having any heat, it was time to strip the every part of pipework from the engine...................and here's what I found!

Given the matrix & radiator leak, it appears someone has poured a bottle or two of Radweld.

I'm pleased to say now have a piping hot heater.

In my opinion, this is clear evidence why Radweld shouldn't be used.

Brianjone5 · Nov 16th, 2015, 08:55

I take your point, but this may not be Radweld. Radweld is a liquid that needs air to solidify. If there was liquid in the coolant system, how could this be? I think this is something else.

Anyway, you must be pleased and warmed, to have a) fixed the original issues the the best way and b) fixed the lash up that blocked your heater pipe.

960kg · Nov 16th, 2015, 11:40

You are quite right ^^^^^ i have used Radweld in my older motors when a young lad and it has saved me a lot of money plugging leaks.

Radweld is designed to circulate in the system and when it finds a hole to leak from it will solidify and block the hole until then it will continue to do it`s work circulating with the coolant.

GreenBrick · Nov 16th, 2015, 12:23

That's not egg is it???

Luxobarge · Nov 16th, 2015, 12:33

Quote:

Originally Posted by GreenBrick

That's not egg is it???

That was my thought too - even worse than Radweld!

GMC · Nov 17th, 2015, 21:45

Quote:

Originally Posted by GreenBrick

That's not egg is it???

Don't think so, it's solid (as hard as stone)
Whatever it is, my problem is now solved

GMC · Nov 21st, 2015, 09:55

Finished rebuilding the Heater & controls last night.
Outside temp -1.1 deg C
Inside temp +33 deg C
Happy days

Nov 15th, 2015, 21:15	#1
GMC Senior Member Last Online: Mar 13th, 2023 13:51 Join Date: Dec 2005 Location: Glasgow	Radweld - why you should never use it! Some of you may recall my various posts regarding the total lack of heat in my '95 T-5R. To recap, since buying the car in September 14, I've had no heat whatsoever. Along the way, I've replaced the heating matrix (was leaking), the radiator (also leaking), the water pump (was doing the timing belt anyway & the thermostat. But still, there was no heat whatsoever! Anyway, after replacing all the hardware and still not having any heat, it was time to strip the every part of pipework from the engine...................and here's what I found! Given the matrix & radiator leak, it appears someone has poured a bottle or two of Radweld. I'm pleased to say now have a piping hot heater. In my opinion, this is clear evidence why Radweld shouldn't be used.

Nov 16th, 2015, 11:40	#3
960kg Premier Member Last Online: Dec 28th, 2022 12:25 Join Date: Jun 2009 Location: Mercville	You are quite right ^^^^^ i have used Radweld in my older motors when a young lad and it has saved me a lot of money plugging leaks. Radweld is designed to circulate in the system and when it finds a hole to leak from it will solidify and block the hole until then it will continue to do it`s work circulating with the coolant. __________________ Mercedes C320CDI Sport Estate 3 litre V6 7 Gear Auto Remap 290bhp 628Nm torque @ 1600revs 45.1mpg

Nov 16th, 2015, 08:55	#2
Brianjone5 Junior Member Last Online: Jan 31st, 2017 18:19 Join Date: Jul 2015 Location: London	I take your point, but this may not be Radweld. Radweld is a liquid that needs air to solidify. If there was liquid in the coolant system, how could this be? I think this is something else. Anyway, you must be pleased and warmed, to have a) fixed the original issues the the best way and b) fixed the lash up that blocked your heater pipe.

Nov 16th, 2015, 12:23	#4
GreenBrick SilverBrick Lives! Last Online: Yesterday 22:18 Join Date: Apr 2015 Location: Poynton, Cheshire	That's not egg is it???

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