Mercruiser V6 Manifold problems and Conversion kits
Posted on | January 20, 2010 | No Comments
From approx 1997-2001 Mercruiser fitted a beautiful one piece exhaust manifold to their V6 marine engines, unfortunately many of them started to corrode internally early on, especially on salt water engines, giving cause to the usual manifold related problems, ie- water in the oil, rough running etc.
The problem was probably caused by "core shift" during the casting process, where the sand or foam core in the casting moves slightly during the casting process and causes the internal walls to be thinner on one side than the other and in some cases very thin, hence the early corrosion problems.
This was probably caused by the intricate nature of the one peice casting compared to the earlier (and current) two piece type.
If you have these manifolds fitted to your boat we recommend that you replace them immediately with the two piece type as shown below
For further Information click here Mercruiser V6 Manifolds or call us at the number on the header
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