by boyscout on Wed, 27 Dec 2017 6:11 +0000
Changed Timing belt with new pump and kit as 100000 interval reached hilux is ln106 1996 model took it for a drive to check for leaks none next day started leaking after driving pulled off water pump thinking gasket as lots of coolant in case it was not coming from weep hole on water pump unfortunately did not pressure test system did not think,leak appeared again,damn this time took timing case cover off and pressure tested with borrowed tester,coolant coming from water pump mounting bolt unbolted water pump changed gasket and on bolts used Holden sealing compound for head studs on bolts ,installed pressure tester no leaks,still fine,a mechanic suggested the compound for bolt,not sure why the bolt leaked.