If you need dis-assembly or replacement instructions for any other auto/car part, or you want to ask question related to your car/truck jeep problem then please leave the comment with your details, so I can provide you the required instructions and solutions.
If your taking your car to mechanic to get repaired,then yes you can bypass heater core till you reach the mechanic.Basically its not advisable to by pass heater core.
You will not have any heat at all ! so do this. remove the hoses. on firewall side to heater core. go to any auto parts store and buy a coolant flush kit, then use the right size tube to hook hoses back together and clamp them. recheck coolant and that should be it.
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For more help,related to this ,check the list below:---
How to replace heater core for All car models?
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All types of car overheating problems and troubleshooting?
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For Instructions regarding All types of car heater problem repairs.