IknowwhatIhaveB to Mechanic Advice@gearhead.townEnglish · 10 months ago

Best way to use leak-stop in my heater core? (1976 Mercedes 350SE)

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Best way to use leak-stop in my heater core? (1976 Mercedes 350SE)

IknowwhatIhaveB to Mechanic Advice@gearhead.townEnglish · 10 months ago

3

My heater core has a slight leak - it is a massive job to re/re and no mechanic around here wants to do it, but very simple to isolate the heater core. I have a bottle of Liqui-Moly Radiator Stop Leak, and it looks like it requires heat to activate based on the instructions.

I was thinking of isolating the heater core, flushing it with water and then using the stop leak as a temporary measure.

Does anyone have any clever ideas as to how to activate the stop-leak with an isolated heater core? (No way am I letting that stuff get anywhere near my engine - I’m only considering it as I have nothing to lose since if it doesn’t work, the heater core has to be replaced anyways.)

I have heard of stop-leak working for years in some cases which is why I’m wanting to try it.

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10 months ago
It’s a massive job on the W116… Plus, usually RHD German cars are even worse as they are conceived as LHD and stuff is shifted around to make it work. Lots of RHD Mercedes stuff looks like it’s from a kit car.

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