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was just curious how to remove the crank pulley not to sure ?????

need to replace waterpump was just wondering if i had to change the timing belt or remove it to get waterpump off timing belt still looks good

i replaced thermostat and my water pump has small leak in it have heat for a couple of days then all of a sudden no heat i think i might have air in system ho to bleed out

got a universal oxygen sensor don't know how to wire it to old one what colors go with what wire
universal
black
tan
2xwhites

old sensor

blue
white
2xblack