Proton Perdana V6 which come with Mitsubishi 6A12 engine, sometime have some controversial issue on their maintenance side, and for this 6A12 cylinder head gasket, the price tag for Japan item is far more expensive than those made in Taiwan or China, hence the owner may tend to buy the cheap item when come to this parts.
Now, just see what make the difference between Japan parts with other, beside the more higher grade of graphite material, please take a look at the 4 holes that have the blue O-ring seal on it.
And let's take a look on the 6A12 V6 engine configuration, unlike some of the engine which the 2 cylinder head is making a "V" shape on the engine bay, the Proton Perdana V6 is a bit difference, one of the engine cylinder head is staying flat like those normal engine, and another block is 45 degree sideway.
So, some say that for the flat side of engine cylinder head, it can use any cylinder head gasket, but the side that is 45 degree away, due to the pressure on the 4 holes with blue O-ring, only the Japan item part can sustain that working pressure, others may start to show sign of leaking after 3 weeks of installation.
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