Need some opinion on this engine. Am I screwed?
 

Hi,

Some of you already know I've bought 03 4.6is pretty cheap.
More info on, http://www.xoutpost.com/bmw-sav-foru...-03-4-6is.html

Anyhow, I've purchased new motor, me and my friend replaced guides, rebuilt vanos, PCV valves, etc... anything that is PITA to do after the engine goes in.
It's taken pretty long time because we both have family with young babies and full time job. So much we can work on each day.

So we are at final stage, torquing down the crank shaft bolt.
When we were tighting it up, crank spinned, and all of sudden water gushed out from exhaust port. #3 cylinder exact.

I'll let pics and videos to do talking.

https://youtu.be/xThqS5Bu4vs

https://youtu.be/TWum8nJHqPY

I tried to contact seller but the engine only has 30 day warranty. so pretty much no help financially.
Having said that, he said crank the engine without spark plug and drip some engine oil, it should clean itself up and all water should come out. Also told me that sand like particles in water is from carbon build ups. Nothing to worry about. Is this trustworthy?

I never seen anything like this.... I see some rust on the valves.... Not sure whether there could be some corrosion on piston and cylinder bore.

What you guys think? Is this engine garbage?

You need to stop. From here on in you will be wasting more time and money. There is no reason for water to be coming from combustion chamber. Unless spark plugs were left out and it was either pressure washed or left outside in rain, or the valves were open during a water event. the only other way is a blown head gasket. You have a big issue here and it needs to be diagnosed. not sure if engine is back in car. If it is, you can do a compression check turning it with the starter. If it is still on stand, do a leak down. If these tasks are beyond your skill set, I would put the tools down and seriously re-evaluate what you want to do here. I would suggest getting a shop involved. Not to be rude, but your questions lead me to believe this level of mechanics might be a stretch. Time to leave it to a professional or sell it and cut your losses. FYI, carbon has nothing to do with coolant. That the seller tells you that tells me all I need to know about them. Pretty sure he sold you an engine that is F$%##D

Water came out the cylinder side or port side? If it's cylinder that means it possibly hydrolocked.

I think in your original post I posted that there is no such thing as a Cheap BMW.

If water is only gushing from number 3 cylinder, then it probably had a blown head gasket. I would put the starter back on the engine and see if you can spin the engine on the starter. Remove all the spark plugs so the engine can spin a little faster. A blown head gasket with the engine out is not the end of the world. I'm more concern with how long the water been in the engine. I assume the engine was sent with the oil drain from it. I would get a borescope and look down the spark plug holes of all the cylinder to see if you can see the cylinder wall with the pistons down. You may want to remove the oil pan and see the condition of the main and rod bearings. If the chain guide was intact that knocking is probably a burnt rod bearing. Coolant from the blown gasket probably leaked down into the oil pan and since oil float on top of water, the oil pump pick up was probably sucking up water and not oil. Water is not the best lubricant so the bearing got hot and got burnt. If the journal on the crank is scored then I wouldn't put any more time or money into that engine.

GL

Since it is a V8, and cylinder no.3 is on the right side looking forward it would be on the starboard side, not the port side.

:rofl:

If I was in your position, I would tear down both motors, send the best block and heads to a good shop for machining/refreshing, then rebuild one good motor with best parts from both motors.

As stated prior, cheap/non-running BMWs usually end up costing more in the end then fair priced/well sorted ones.

How much did you pay for that engine if you don't mind me asking? Those things ain't cheap usually.

Take it to a machine shop/engine shop if you don't want to tear into it yourself. Someone familiar with Euro engines. Won't be cheap, but for what you got the truck for... would still be worth it.

As upallnight said, sounds like a blown head gasket as I doubt a motor that valuable was left outside uncovered with the intake manifold or the plugs removed. Plus water would be in the other cylinders as well. If it has oil, drain it and see what comes out. You'll want to pull the lower and upper pans anyway as now would be the time to do those gaskets if the engine is usable.

This x100000 - I would do a complete teardown and rebuild making a Frankenmotor of the best parts, only way to do it right.

He got the motor for $3500.

Well at least you got two engines worth of parts. Break down both and prepare to do an engine build from the bottom up and hopefully you can make one good engine from it all.