Checks for cracked cylinder heads and blockages, blown gaskets etc. in Petrol and Diesel engines
Supplied with a cone adaptor
Once fitted to the running engines coolant filler neck the rubber bulb is used to suck the gasses that collect in the top of the filler bottle through the fluid in the tester
If there is CO or CO2 in the gases it will turn the fluid green indicating a blown head gasket or similar issue
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