Yesterday my truck developed a coolant leak that is in close quarters at the rear of the motor. I checked the local parts houses loan-a-tool for a tester, but none had an adapter that would fit my Disco. After returning home, I saw an old bicycle tube in the garage. It stretched over the tank neck perfectly. After plugging the overflow tube, I rolled the open end up and ty-rapped it. Used another couple of wire ties for hose clamps on the tank neck. Then gorilla taped the whole thing to contain more pressure. I used my bicycle pump to pressurize it. Lo and behold, it held 10 psi and coolant started dripping! No more chasing leaks down with the engine hot. It is ugly, but it worked.
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