Search results

  1. Lou C

    350/5.7 Exhaust valve seal leak + low compression

    Find one that caters to American muscle cars.
  2. Lou C

    Looking for bare engine block with pistons

    Sorry just saw it!
  3. Lou C

    Looking for bare engine block with pistons

    Wow that looks great! I never learned how to do upholstery, only went as far as replacing the backing wood panels. Soon it will be like new.
  4. Lou C

    Water on top of pistons and rockers

    3-1/2" to 4" I.D. External Flapper - Hardin Marine (hardin-marine.com) something like this, if its the right size, you have to measure the opening in the gimble housing. I know the Y pipe is 3.5" at least it is on mine.
  5. Lou C

    1997 5.7 Gi fuel system

    I took a look at the diagrams, it appears for that year range the engines still could come with a mechanical fuel pump, I'd check yours to see if there is a block off plate that can be removed, (it depends on what engine block was used when they replaced the original) if so I'd use the...
  6. Lou C

    Water on top of pistons and rockers

    You’re welcome! Hopefully that solves it. On my boat I have the OMC 4.3 V6 which originally had the one piece batwing manifolds. In the 15 years I ran it with them I never once had a hydrolock from water coming up the exhaust. The only time I had water in a cyl was due to a blown head gasket. I...
  7. Lou C

    1997 5.7 Gi fuel system

    Also, when using the carb instead of EFI I would have gotten rid of the fuel reservoir there is no need for it on a carbed engine and gotten a Carter low pressure fuel pump and make sure it is wired correctly so that you have power to the pump during cranking from the terminal on the starter...
  8. Lou C

    Water on top of pistons and rockers

    It’s what I said earlier. I’d pull the drive then get a snap ring pliers. Remove the snap ring that holds the aft end of the exhaust bellows in the pivot housing then take off the clamp on the front end of the bellows on the gimble housing. Then pull out the exhaust bellows. Now install an...
  9. Lou C

    Water on top of pistons and rockers

    Ok judging by your pic you’re not sitting low in the stern, mine sits lower, the waterline on mind is right at the top of the part of the transom mount that moves side to side. As in right under the trim piece that says OMC on it. You seem to be an inch or so higher. I measured my static water...
  10. Lou C

    Water on top of pistons and rockers

    If it were my boat I'd look into removing the exhaust bellows, and adding a flapper valve over the gimble bearing exhaust opening.
  11. Lou C

    Water on top of pistons and rockers

    Wow that is really odd. Never saw that before. Every OMC parts catalog I have ever seen, has had them. Either they replaced the Y pipe with a Volvo one due to corrosion, or there was a slip up on the OMC production line and they were left off a number of units. Even to the end of OMC Cobra...
  12. Lou C

    Water on top of pistons and rockers

    nope that's for a Volvo Penta AQ set up. You need the OMC ones, the parts are still available so order up the flappers, pins and grommets.
  13. Lou C

    Help please

    Boat looks to be in good shape. As noted the issue is parts availability and the difficulty in converting it over to a modern drivetrain (Old style Volvo, large transom cut out, won't take a modern drive system without fiberglass work). Check it all over for rot, if you find rot forget it...
  14. Lou C

    1997 5.7 Gi fuel system

    Read on the Holley forums you will see that these can be troublesome too. Learn, know and love your carb. Some of us grew up with cars that had carbs and learned how to deal with them in all kinds of weather. Every 6 years or so I take my Quadrajet apart clean it out and re assemble with a $55...
  15. Lou C

    1992 Mercruiser 4.3 Alpha One Gen II has water in oil after rebuild.

    What I would have done first: Replace the hoses that feed water from the stat housing to the exhaust manifolds with clear hose. Put the boat in the water and run it long enough to get the engine hot enough to keep the stat open. Get someone to run it above idle while you check if there are...
  16. Lou C

    1997 5.7 Gi fuel system

    Have you made sure that: The choke fully or nearly fully closes with a cold engine The choke pull off pulls the choke plate open a fraction of an inch after started The electric heated choke fully opens after a few minutes Marine carbs do not have automatic fast idle cams as you’d have in...
  17. Lou C

    350/5.7 Exhaust valve seal leak + low compression

    The heads have to come off. Both pics show evidence of water leaking in from the exhaust or other sources and you have either bad valve seals and/or guides. Here’s a pic of my old engine when I had the manifolds off to change them. At the time the engine was 23 years old used in salt approx...
  18. Lou C

    Water on top of pistons and rockers

    I can’t believe that there aren’t the holes in the Y pipe for the steel rod that the flapper pivots on. They would be under the rubber hose that connects the exhaust elbow to the Y pipe. Only thing I could think of is someone removed the flappers and filled in the holes with something like steel...
  19. Lou C

    Water on top of pistons and rockers

    here's what it looks like installed. Not saying it's the only way water gets in but I'd put them back in.
  20. Lou C

    Water on top of pistons and rockers

    not necessarily, if you slow down fast it can surge up the hoses connecting the Y pipe with the elbows. If you never had to slow down fast then it might not happen. Mercruiser never dropped their flappers. So either you have flappers in the Y pipe, or you remove the exhaust bellows and fit an...
Top