I am restoring a 1969 Dodge D100. I recently overhauled the 6cly 225 engine. I had the block vatted and bored, the crank ground, new cam, pistons, oil pump and bearings and had the heads completly redone milled, ground, new valves and seats. I assembled the engine and installed back in truck. I started the engine periodically while working on other issues on one ocassion I noticed water leaking from the heater box. It was just detoriated hoses from sitting over the years but I found the heater valve was bad. The truck sat idle for several months while I located a new heater valve once back together I cranked it without problems and it ran great. Today while still working on other issues I cranked it again and as I walked around to the front of the truck water was pouring out of the exhaust pipe. I shut it off and checked the oil and it appeared a little milky. I checked the radiator and there was no water in it, I tried filling up the radiator and it would not fill I then removed the dipstick and it was milky about 3/4 up the stick. I left it out and continued to fill the radiator until I observed milky oil overflowing from the dip stick tube. I replaced all gaskets during the overhaul and the engine have never gotten hot and has probably only ran about 30 minutes over the last six months. any suggestion as to what the problem may be with the new overhaul.

Excessive pressure in the coolant system, water in the oil, I'm guessing head gasket issues if the setup was working before the rebuild.

Even if there was a crack or they hit a water jacket when doing the machining for the valves you'd still be able to fill the radiator.

Pull the plugs and fill the radiator - does water come out those holes?

You need to get this engine apart quickly!!!!! Dont wait a couple of months or weeks for that mater. Lube it really good with oil after blowing it out real good with air. Check for cracks or leaks as you disassemble it. Dont try to start it while its full of water either.
Ask me how I know these things???
Frank

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Another vote suspecting a bad head gasket.
Drain all fluids and pull the plugs, crank and spray WD-40 into the cylinders to avoid stuck rings and/or rust pitted bores.
Pull off the head to see what went wrong.
DD

Yes.. Get it apart ASAP and don't even crank it over. Remember, air will compress, water will not. Things break before water compresses!

-Mac

Just so there is no mis-understanding, do not crank the engine unless you remove all the spark plugs.

If you cannot pull the head off it today... it would be a good idea to at least pull -out the spark plugs and crank the engine over, to get the water out of the cylinder bores. Spray in some oil to help reduce the chance of rust formation.

As others have already noted, the best action would be to dis-assemble the engine and dry everything out, as soon as you can.
DD

Thanks for all the info, was hoping it was something small. I drained the oil and water from the pan, removed the plugs and found # six plug had some water on it. Turned engine over no water blew out. Added new oil and unhooked radiator. Started engine again to lube inside up and it ran at idle just fine it was a little rough when I tried to accelerate it. I then removed the intake and exhaust manifold and the # 6 exhaust had milky film of oil. I removed the head and found that the cylinder wall of #6 had about a 4 inch vertical crack in wall.

Ouch...
Time for a sleeve, or a new block.

Is it something that was missed during the rebuild or did it get hot?
DD

It must have been missed, engine has not ran hot and has only about 30 minutes run time over the last 4 to 5 months.
Talked with the machine shop they are going to check it out once I remove the engine and break it down. Hopefully a sleeve will work, not sure how easy it would be to find a block.

How was it running before the rebuild? Are you sure this is the same exact block you gave them?

perhaps it got cold. really cold like as in ice. has it been frozen?

regards,Rod

It may be real easy to find another block depending on where you live. I am unsure how something like that could have been missed, I assume that they Magnafluxed the block? That would have told them right away that there was a problem.

Especially since they bored the block, that would have been something that stuck out like a sore thumb.


~THOR~

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