Heater Core Foam: Which surfaces

bavbob

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I have all the foam now for the heater box but the core obviously had some foam on it, hard to tell since mostly disintegrated. Can someone tell me what surfaces of the core are covered. I have 2 and 3 mm foam. Thanks
 

Wladek

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All round (without front & rear wall of radiator core part where air flow). Make it in one piece, because later it will be much easier to slide radiator into into two-piece heater-box housing.
Foam on radiotar is a heat & vibration prevention.
 
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