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Black smoke then steam out of my rebuilt 86' 5.7 alpha 1
On May 6, 12:18*pm, wrote:
On May 4, 2:56*pm, Heimskr wrote: On May 4, 12:58*pm, wrote: On May 4, 12:54*pm, wrote: On May 4, 9:43*am, Heimskr wrote: On May 3, 1:55*pm, jim78565 wrote: Heimskr wrote: Yesterday when I was running it to adjust the idle, before putting it in the water today :-( , everything was fine then, all of the sudden quite a bit of black smoke came out and it started blowing steam. Did I just witness a head gasket letting loose? I'm really hoping that's the case instead of a cracked head or block. I checked the oil this morning and it has a green hue with the level way up, about an inch above full. I didn't bother checking the coolant as I figure it went up in steam or is currently sitting in the oil pan. Thanks I'm a noob to boat ownership & engine repair/upkeep so please K.I.S. for S K.I. real S. You have some problems. Black smoke could mean your tstat is stuck open. Steam could mean your tstat won't open or the water pump is toast or a few other things. Great. Thanks for the K.I. real. I've got a bunch of work to do.- Hide quoted text - - Show quoted text - Before you start taking the engine apart check a few more things. Once you start disassembling you might lose some information that you can collect now. Black smoke is unburned fuel. *That could either mean you have a fuel delivery problem where you are getting too much fuel. *Or you have a cylinder/cylinders not firing thus not burning the fuel they do get.. Take a dry and wet compression test of all the cylinders and write down the numbers. *"Wet" means squirt a little oil thru the plug hole and crank it a couple times before attaching your compression gauge.. Bad reading dry with good readings wet means a ring problem. *Bad readings dry and wet is either gasket or valves. *Since it's a rebuilt engine probably gasket rather than valve. Steam is not particularly telling if you mean steam out the exhaust.. The water going in to cool the engine is expelled through the exhaust system and once the engine gets hot it will make some steam because the water gets dumped into the exhaust where it is pretty hot. Are you certain of the oil level before you started the engine? *If the oil level really did rise then I suggest letting some out and looking to see what is in it. You can pump it out the dipstick but it would really be better to loosen the drain plug if you can get at it. |
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