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Cooling Problem w/ 4.3 GL vovlo I/O
Yes, there are rubber plugs that you put in and tighten with a nut in the
center. These are simpler to use with the engine in place because the metal ones have to be driven in and it is hard to get a straight go at the block while it is in the boat. That is a good recomendation. If you can get behind the mount that would be the best as I'm sure you've figured out :-) If not you will need to support the engine on that side while you remove the motor mount. Sounds like you are prety handy since you've spotted the casting plug problem. If you place some wood in the bottom of the boat you should be able to get a hydralic bottle jack to hold up the side of the engine at the edge of the oil pan where it is bolted to the bottom of the block. You will have to play around with wood scraps to get a flat platform to rest the bottle jack on. You want to distibute the load on the bottom of the boat as much as is practical with the wood. Probably 2-300 lbs of load involved so it is not a lot worse than a big guy standing on one foot. You may also need to place a small scrap of wood on top of the bottle jack to keep from crushng the edge of the oil pan. Typically there is not enough room directly under the oil pan for a jack, that's why you have to go at the edge of the block. Break the bolts that hold the mount on the block free but do not loosen. Remove the top big nut on the boat end of the mount. Then jack just until the engine mount starts to lift a little. Then you should be able to remove the mount from the block. As you can imagine try to make sure the bottle jack is solidly in place and take care not to jar anything any more than you have to while the side of the engine is on the jack. Of course do not reach under the engine either. Have everything ready to go so that you can complete the repair and do not have to leave the engine on the jack any longer than needed. Be careful because we don't want any injured rec.boat posters :-) "landshrk4" wrote in message ps.com... jamesgangnc wrote: Are you sure that no one has removed the drains on the manifolds or the sides of the block? Both locations have removable plugs designed to allow the engine to be drained for winter. When I winterize my boat I take them out and leave them out until spring. It is not old enough for corrosion to have taken out the casting aka "freeze" plugs unless someone mistakely used steel ones when it was built. One of the differences in marine engines is the use of brass casting plugs isntead of steel ones. Changing the impeller in the outdrive would not have any effect on the water coming out the sides of your engine so this is a different problem. When the original impeller went south how long did the engine run overheated? Perhaps the overheating could have had some other effect leading to this problem. Such as melted water or exhaust hoses on the manifolds. The manifolds will get very hot if the boat is run for any length of time without cooling water. The rubber parts in and connected to the exhaust system will not take it for long before they melt. The motor only ran long enough for me to park my truck/trailer and for the wife to pull to the dock to pick me up. I would roughly guess around 3 - 5 minutes. Following the replies last night, I went back into the engine compartment and found one of the expansion plugs laying next to the bilage pump. The other plug is still in but must be cocked for it is leaking. This one will be a problem for it is directly behind a motor mount. I am going to purchase a couple of plugs and install them to see if there are any other pending (hidden) issues. I had been told that I could get expansion plugs from a local parts dealer that are expandable by way of a bolt instead of the "tap in" types that would be supplied by Volvo (or aftermarket). Has anyone used these types of plugs? Can anyone recommend how to replace the plug that is behind the motor mount? It would be much easier to take it to a local repair shop but I want to do the work myself.... how else am I to learn the fundamentals? |
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