I came across high MGB Oil temp once. The cooler fan has an aluminium plate riveted in the housing. Two of the rivets on one side had corroded and allowed the plate to be sucked towards the impeller blocking airflow. This caused the mgb temp to rise. Fortunately, the plate could not get pulled completely into the impeller because of the remaining rivets on the opposing side preventing it. Also, the impeller has a small shear type drive shaft. If that fails the temp of the mgb will rise.
Last edited by mexmike; 2nd May 2017 at 03:19.
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