Re: Help! water outlet/radiator housing leaking again

Posted by HH56 On 2017/5/18 9:22:38
As Mal and Tobs said make sure the gasket surfaces are flat. The old gaskets stick and tiny bits pull off and stay on the surface when removed. They are almost invisible and even after sanding can have the edges smoothed so that are not as noticeable to the touch but can still cause new gaskets to leak. Use a putty knife or gasket scraper and carefully scrape the head surface flat before laying the new gasket in place.

If you are replacing the outlet then you don't need to worry there but when reusing the older steel outlets, aside from any gasket material adhering, if the surface has corroded and pits developed I have had luck using JBWeld to lay a thin skim coat on the cleaned surface and when dry, sanding the JB Weld and entire outlet surface flat.

The surface under the radiator hose has also been a trouble spot with corrosion and rust holes. Water can seep under the hose even if the clamp is tight. JB Weld also does a good job in repair there too but replacing is better if the entire outlet is in that poor of condition.

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