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  1. J

    manifolds for a v-6 chevy

    My 3.8 OMC has a manifold with the riser at the rear. OMC is the only source for this manifold, which makes it pricey. There are manifolds available from aftermarket with the riser in the middle which fit 4.3 heads. These are cheaper than the OEM part and I believe that they will fit my head...
  2. J

    Exhaust manifold for OMC 3.8 I/O

    I just found water in all three cylinders on the odd numbered side of my 1984 3.8 v-6. What's the best way to test for leaks in the exhaust manifold? Is it likely that a blown head gasket could do the same thing? The manifold is three years old, and flushed with fresh water after every use. It...
  3. J

    projected tip spark plugs vs standard tip

    Does anybody have any advice on switching from a standard tip plug, such as the AC MR43T to any of the projected tip types by Champion, AC, or NGK? This is for a Chevy v-6 in a OMC I/O. <br />Are there any problems to watch for, or do they work well?<br />I'm looking for a solution to cold...
  4. J

    spark plugs for 3.8 OMC

    I have a 1984 3.8 (229 Chevy) OMC I/O in a 23' Proline. I've been having problems with a skip that is present when cold and usually stops after the engine is warmed up. The entire engine was proffessionally rebuilt and has about 70 hrs on it. The plugs I have in it are AC mr43t, as per specs. I...
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