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Several months ago I had increasing water loss from the radiator. Couldn't find a leak until that lucky day i saw a stream of water coming under the TB42 inlet manifold. I removed the oil cooler assembly. Found oil cooler cover(housing) was corroded and wall became thin has a pin hole, water jacket plugs corroded and oil cooler was fine.
Bought last cover from Nissan and installed with new plugs and water hoses.
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dom14 (24th September 2017), GQtdauto (23rd September 2017), MB (23rd September 2017), my third 256 (23rd September 2017), NissanGQ4.2 (24th September 2017), PeeBee (23rd September 2017)