Re: 1950 packard 288 engine just rebuilt now has water in the oil
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Home away from home
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Wow, it would seem that you have certainly covered all your bases when rebuilding your engine, and also in all your testing to discover the source of the problem.
That your pressure tests are good is perplexing, I would have thought one of those would have failed. And that magnafluxing didn't show anything is perplexing as well. I know I'm not telling you anything new! I would seem that there is a crack that opens when the engine is hot, and that maybe the combination of that, and the cooling system being under pressure it's able to push coolant into the oil, but where is this occurring???? Could this be occurring at the valve guides? Are they in the water jacket? Hopefully someone has some better ideas for you. I'll be curious to know what the fix is and hoping that you don't have to look for a different block.
Posted on: Today 10:10
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Re: 1950 packard 288 engine just rebuilt now has water in the oil
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Home away from home
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Slatewood
The good news is perhaps there may not be anything wrong with the engine. Unless you have installed a coolant recovery tank every time you top-off the coolant level you reset a process where the liquid will seek the same volume as the radiator/engine. You likely start with the prescribed volume cold/cool, but once the coolant warms the pressure rises, the cap opens and some liquid is expelled. Without a ‘catch-can’ once the liquid cools the cap vacuum feature opens and air is drawn into the system. I have been led to believe that as long as the liquid covers the ‘tubes’ the system has a sufficient level. I would top-off the level and warm the engine to full operating temperature, plus a little bit of idling in the garage. Let the engine completely cool (maybe the next morning), and determine the coolant level. Do not add coolant unless you can see the tube tops are dry. Repeat the process of using the car, idle a bit, allow a full cool-down, and recheck the coolant level. The difference between the two level checks is likely the amount of coolant the engine used/leaked. My bet the thermal expansion of the fluid has masked that true usage. Remember every time the coolant temperature hits a new high, some amount of fluid will be expelled. Insert my ‘war story’ of the big puddle of water under Brand X every time I used it! That is until I stopped over filling it. dp
Posted on: Today 11:13
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Re: 1950 packard 288 engine just rebuilt now has water in the oil
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Forum Ambassador
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Just FYI if it an overfill issue with the "topping off", Packard states the radiator maximum fill level should be approximately 1 inch below the bottom of the filler neck which would be an inch below the lower rim or pressure sealing surface. Any higher than that and Packard says coolant can be expelled out of the overflow tube when the engine is warm.
Posted on: Today 12:06
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Howard
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