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  1. Lou C

    Intake Manifold Gaskets

    You said you had a 2004 Sea Ray correct in previous threads so those SHOULD be Vortec heads, how many bolt holes for the intake are in each head? If only 4 bolt holes then those are the right gaskets. Vortec had only 8 holes for the intake, 4 per head, pre-vortec had 12 bolt holes or 6 per head...
  2. Lou C

    Overheating Problem

    The part you removed is the temp sending unit for your temp gauge. I suggest you get a shop manual & start reading. These are very simple systems
  3. Lou C

    Overheating Problem

    You’re not getting anywhere enough water up to the impeller. The water should be shooting out of the manifold feed hose and the hose that goes from the impeller to the thermostat housing. Are you using good fitting muffs? They must fit tightly for the impeller to prime. You might have old...
  4. Lou C

    Exhaust pieces and parts

    Good work You can do a better job doing maintenance yourself!
  5. Lou C

    Volvo Penta 7.4 overheats

    That’s how I did it. The tricky part is lining up the water tube. See if you can get someone else to help you; I was able to do it myself. The mechanics I used to use recommended splitting the drive & cleaning that area out every 5 seasons in salt water. So it’s a good thing to learn how to do.
  6. Lou C

    Bought a house on the lake! Got to get the old boat up and running.

    Very nice, I'd love to have one. Don't know why no one makes boats in that style any more. I don't want a center console or bowrider for my next boat up here in the northeast, I want a closed bow like that for when I go out into Long Island Sound. I've actually thought about having a 'glass...
  7. Lou C

    Volvo Penta 7.4 overheats

    https://www.nlamarine.com/products/volvo-penta-3850935-3855695-cobra-sx-lower-unit-gearcase-1-66-1-97-4-3l-v6-sx-m?variant=19784692334689 Here's some pix, not sure if this is the same as yours, but it looks like the water passage can be accessed by removing the cover with 4 bolts. I'd be very...
  8. Lou C

    Volvo Penta 7.4 overheats

    That irregular o ring should be replaced each time you pull the drive; I coat it with marine grease to hold it in place while reinstalling the drive. While you’re at it check the driveshaft bellows carefully. If you need to split the drive I have a trick for that job! I'm still thinking your...
  9. Lou C

    Volvo Penta 7.4 overheats

    That’s why I said to test it by taping over the water intakes and backfilling with water via the raw water intake hose. This is described in Volvos documentation on troubleshooting overheating. Post # 20. Like I said earlier I’d suspect Maine growth in the water intake area and possible rotted...
  10. Lou C

    Exhaust pieces and parts

    https://www.marinepartsexpress.com/VP_Service_Bulletins/158%20%20%20%20%20%20%20%20%20%20PB%20P-25-1%20%20N2%20%20%20%20V-01%20%20%20%20%20Exhaust%20pipe%20seal%20obsolete.pdf it isn't dated but I think this happened around 1999 or so.
  11. Lou C

    Volvo Penta 7.4 overheats

    The plastic ones, don't really go bad unless someone let the water in the raw water circuit freeze and then it cracks. The Cobra I have owned 20 years I have never had to replace it, I have a few spares just in case though ;)
  12. Lou C

    Trailer surge brakes

    I've had the free backing drums for nearly 20 years and never had trouble backing up, the only troubles I've had is the wheel cyls seizing up and the same with the adjusters. Found a way to make both last longer so I didn't have to change to disc brakes. The last set I installed have the...
  13. Lou C

    Volvo Penta 7.4 overheats

    tape over drive water intakes with duct tape tilt drive up disconnect raw water intake hose at impeller housing have a helper watch under left side of pivot housing pour water in hose and see if it leaks out the left bottom part of the pivot housing, if so then it's probably cracked. The pic of...
  14. Lou C

    Exhaust pieces and parts

    I found my one of melted ones in the exhaust outlet in the transom mount, the other was still on the pin that fits into the Y pipe. I had to pull the drive to get access and pulled the other melted one out with a 3 jaw grabber tool. With the drive removed I was able to see it looking through...
  15. Lou C

    Exhaust pieces and parts

    They may come up as unavailable on the Volvo parts site because Volvo put out a service bulletin basically saying they didn’t think they were helpful & they can melt and block the exhaust if the engine overheats. So they recommended not replacing them. However the parts are still out there...
  16. Lou C

    Penta 4.3 GL in saltwater?

    Some Volvos have the heat exchanger mounted horizontally some have it mounted vertically on the starboard side. The 4.3 is quite compact shorter than a 4 cyl or V8 but as wide as a V8. They are pretty durable the main things to watch are leaks from the intake gaskets (Vortec) and exhaust...
  17. Lou C

    Penta 4.3 GL in saltwater?

    If you wanted to add closed cooling you would have to assess the internal condition of the engine by removing the thermostat housing & front circulation pump so you can see what the cooling passages look like. If you see light surface rust, ok, but if you see flaking cast iron, I would not add...
  18. Lou C

    Valve seal replacement on 4.3

    My pleasure & good luck with it!
  19. Lou C

    Valve seal replacement on 4.3

    Yep those manifolds look like new. Get the heads checked out (magnafluxed). Clean and examine all sealing surfaces
  20. Lou C

    Bought a house on the lake! Got to get the old boat up and running.

    Wasn't that a Chris Craft? IIRC
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