dtech
Well-Known Member
You may recall the the Hyundai Theta engine development was a result of an alliance - IIRC going back to the 80s with Hyundai, Mitsu and maybe Chrysler. Hyundai eventually bought the others out and used that design to eventually produce the Theta II - which had a major problem in that many prematurely used up their crank bearings and would seize. Hyundai has never revealed the source of the problem but as a result of settlement with the DOJ is obligated to replace the engines when they fail. And Hyundai/KIA have the shortest OCI intervals in the industry - on my 2013 it's 3.5 for severe use and 5k for normal use.In the 80s they were 100% Mitz powered. You could literally lift the valve cover off an eclipse and bolt it to an Elantra.
Makes for some funny swaps when you throw a 4G63 in an old Sonata.
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