Friday, June 25, 2010


Mitsubishi 4G9series engine basically have the same design on the cylinder head, but for the rocker cover in intake manifold, they keep on have changes from 4G91, 4G92, 4G93 and 4G94.

For the 4G93 DOHC rocker cover, normally their designed with 3 goving, 2 groving at one side and another 1 groving at another side.

Recently we came across the rocker cover gasket with 4 groving (as on attached photo), this 4 groving design is quite rare for Mitsubishi Inline 4 cylinder engine, except for the 6A1series of DOHC V6 engine or 6G7series of DOHC V6 engine, it is hardly to find anothe 4 groving rocker cover designed from Mitsubishi engine.

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