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GAFB
Join Date: Dec 1999
Location: Raleigh, NC, USA
Posts: 7,842
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The gap is there by design, there is no need to replace it. Some oil has to seep by and enter the cooler to bring it up to temperature. That way, when the t-stat opens fully, the shock of hot oil entering an otherwise cold cooler doesn't rupture the cooler.
Your money is better spent elsewhere.
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Several BMWs
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