seem to have a water leak somewhere near the bottom of the radiator but cannot find the bu*Łer.

Can just see puffs of steam coming either from the radiator itself or one of the two bottom pipes.

What is best to do? Can radweld fix small leaky pipes too?

The system is such a apin to bleed i don't want to take the pipes off

any ideas??

Thanks

Try radweld first, it does work and I have it in my cars anyway as a preventive measure.

yep, radweld first and take it from there

For what it's worth, I've used radweld on my Tintop and it stopped the leak.

A cheaper option, for those who watch top gear, use an egg.

Dont use radweld do the job properly rad weld works by blocking holes any hole that it finds and there are lots of holes in a radiator cylinder block etc

Radweld will stop the leak but it b*****s thermostats makes them stick open.

Barrs leaks will also stop leaks very effectively but isn't suitable for modern engines with very small water passages such as the K series.

Do a radiator pressure test with system stone cold and the exact points where the leaks are occurring will show up.

You can make a suitable pressure tester up from a pump up garden sprayer and just tee it into one of the small bore connections.

Another testing device that works (I made one myself when I couldn't afford a cooling system pressure tester) requires an old inner tube and an old radiator cap. I cut the valve-stem area out of the inner tube, leaving a circle of ruibber around it roughly the same diameter as the inside of the radiator cap. I drilled a hole in the rad cap big enough for the valve stem to stick through, and voila! A pressure tester. Screw the cap on to the radiator, use a bicycle pump to bring up a little pressure, and look for the pinhole leak. Now THAT's Locost!!

had thought about this very thing! Used to make water rockets with robinsons water bottles in the very same way!

Might give that a go

I used an old bike innner tube valve and a big cork as sold in beer making shops, if you use a small foot pump then you can see what pressure you have in the rad as well.

May help, just a thought.

Rich

[Edited on 10/4/07 by RichardK]