Factory Five Racing Forum banner

Drip, Drip, Drip water torture!!!

771 Views 14 Replies 6 Participants Last post by  tom welch

Recently my MKIV has developed a very small but annoying leak on the lower radiator house outlet (see picture).
I have tried different type of hoses, clamps, etc and nothing seems to stop the leak.
My latest effort was to put RTV around the aluminum outlet, then slip on the hose adapter provided and then a silicone hose over that.
The leak is always occurring on the bottom of the radiator outlet. I have not observed any cracks or holes in the aluminum outlet, but maybe it is out of round?

Any suggestions would be appreciated.

The picture below shows the RTV that was squished out when I slid the hose on so I simply smeared it around the bottom. Not the prettiest and I realize that portion is not providing any leak stoppage. 馃槉
Engineering Gas Motor vehicle Auto part Cylinder
See less See more
1 - 2 of 15 Posts
That almost looks like a double hose clamped. Not right if it is.
The original setup that factory five provide worked for quite some time. It was made up of two hoses at the radiator outlet. An inner rubber hose that brought the diameter (kinda like a sleeve) up so it would match the Steel Hose and the larger rubber hose that would slide over both the corrugated steel hose and the hose over the outlet. I did notice that the outlet on the radiator has a slight "dent" inward, but it's before the "bead"( between the bead and the end of the outlet) so I wouldn't think it would have an effect. I have removed ( it was just ugly anyway :) ) what was in the picture and going back something close to the original setup. If it still leaks, I'll take the radiator out and take it to a shop to see if there is a defect or crack that I cannot see. I'll let you all know how it turns out.

Thanks All.
To possibly save some time, why couldn't you take the corrugated flex off, make a step UP aluminum tube piece and connect it, keeping the radiator and tube diameter the same and the water pump inlet the same as well.
1 - 2 of 15 Posts