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  1. Swedefj40

    4.3 LX water in the oil...

    I'm learning as I go with regards to this engine and how to read the gaskets. That said, Cyl#'s 5 & 6 both look to me like there's rust stains on the head gaskets at the "Fire Rings"(?) I also noticed the lip at the back of the intake/block, where you apply sealant, and right around the sensor...
  2. Swedefj40

    4.3 LX water in the oil...

    They're the 2 piece manifolds/elbows style exhaust.
  3. Swedefj40

    4.3 LX water in the oil...

    Updates... leakdown tests confirm the valves aren't sealing, but rings are good. Dropping off the heads at the speed shop to be fluxed and rebuilt. Hopefully back together in a few weeks.
  4. Swedefj40

    4.3 LX water in the oil...

    I'm going to do a leak down test tomorrow and see if that'll shed some light on things.
  5. Swedefj40

    4.3 LX water in the oil...

    I'll have a look at the thermostat housing tomorrow. The previous owner had an issue with a stripped housing bolt and had the shop retap it. May be an issue there? I'm not sure that, if I have a leak there, how it would show up as a wet exhaust port? Thanks for the clarity on the cross over...
  6. Swedefj40

    4.3 LX water in the oil...

    I didn't notice any anything in the bottom of the thermostat housing. Are you meaning inside where the thermostat is or underneath the intake manifold? I also noticed the area around both middle coolant runners on the underside of the intake manifold looks quite black. Is that normal?
  7. Swedefj40

    4.3 LX water in the oil...

    No I didn't bother with draining the exhaust manifolds as they have coolant in them as they're part the closed cooling circuit. The elbows above are raw water cooled though but flushed with RV antifreeze.
  8. Swedefj40

    4.3 LX water in the oil...

    Well I did the acetone test on the exhaust manifolds and they were okay. I'm definitely going to have to replace them at some point though as the rust is getting pretty bad. I tried to do a pressure test on the block but I couldn't get the right parts to get a good seal to pressurize it. I am...
  9. Swedefj40

    4.3 LX water in the oil...

    Oh, and I also wrapped the engine in heat trace.
  10. Swedefj40

    4.3 LX water in the oil...

    Yeah, I'll look into pressure testing it. The coolant level (and heat exchanger) was full all winter and was checked again just before I tried firing it up this spring. I also had the raw water side flushed out with RV antifreeze as well to be safe when I winterized it.
  11. Swedefj40

    4.3 LX water in the oil...

    Yeah, I understand that. Am I wrong in assuming that everytime the tab on the distributor rotor lines up with the sensor, it fires to that cylinder or am I missing something here? So that a full revolution on the distributer would've fired all 6 cylinders during that one revolution? I started at...
  12. Swedefj40

    4.3 LX water in the oil...

    12 bolt... says Vortec on the valve covers but I think they're lying 😆
  13. Swedefj40

    4.3 LX water in the oil...

    I pulled the distributer cap off after I got it to TDC #1 and checked the #1 cyl. I then rotated the crank until the #6 tab on the distributer plate (?) was at the sensor (pickup) and checked the #6 cyl. If that makes sense?
  14. Swedefj40

    4.3 LX water in the oil...

    Fresh oil in it all winter. I also checked the oil in the spring when I dewinterized it and it looked perfect.
  15. Swedefj40

    4.3 LX water in the oil...

    I didn't notice any moisture in the cylinders when I pulled the plugs. The plugs are new and were put in when I was trying to get the new carb to fire up and they still look great after getting it fired up and running. It's run twice this spring for about 20 minutes each. It's a '96 4.3LX...
  16. Swedefj40

    1987 Mercruiser 454 Loud 'Popping Noise'

    Yeah, just curious.
  17. Swedefj40

    4.3 LX water in the oil...

    So after getting my carb issues addressed, it was time to put it in the water and check that my bellows are leak free and the lower shift cable is working right. I did my pre trip in the driveway and found this: Obviously there's water in the oil. I checked the coolant in the Heat Exchanger...
  18. Swedefj40

    4.3LX & Weber Carb Service

    Yup:rolleyes:
  19. Swedefj40

    4.3LX & Weber Carb Service

    The old girl is really fighting me this year 😡
  20. Swedefj40

    4.3LX & Weber Carb Service

    Well I was planning on launching the boat today and while I was checking the oil level in the driveway I found the oil level was slightly over filled and chocolaty in colour. I unscrewed the filter a bit and this what came out.
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