Good day guys,
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.
Here are few pics I took.
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During my search on net I found not all TB42s are equipped with factory engine oil cooler. Engine runs bit cooler now. :cool: