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Author Topic: Steam Bath  (Read 14815 times)

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NoobKevin

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Steam Bath
« on: August 19, 2019, 08:44:12 pm »
I just fired up my 86 GT after replacing both heads. Immediately heavy water vapor began billowing out of the exhaust. Where could I have gone wrong? Could coolant be entering through the intake and into the combustion chamber? Could the heads and and gaskets be good? I have done head swaps before and I have never had a pair do this right after replacement. Also, the oil is as clean as it was out of the bottle. On the upside, the car fired right up and idles like a champ with the exception of the slightly sweet tasting vapor cloud.

NoobKevin
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GTRS Fiero

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Re: Steam Bath
« Reply #1 on: August 19, 2019, 08:48:03 pm »
So, no bubbles or white milky stuff in the oil?
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NoobKevin

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Re: Steam Bath
« Reply #2 on: August 19, 2019, 08:50:32 pm »
No, none of that so far. I have not let it run more than a minute or two. Oil looks new
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GTRS Fiero

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Re: Steam Bath
« Reply #3 on: August 19, 2019, 08:53:14 pm »
How is your fuel?
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NoobKevin

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Re: Steam Bath
« Reply #4 on: August 19, 2019, 08:56:27 pm »
Dont really know. I have not put gas in it so whatever is in it is what I towed it home with. Thing is, even before I tore the top end down it did not blow this kind of steam.
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GTRS Fiero

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Re: Steam Bath
« Reply #5 on: August 19, 2019, 08:57:22 pm »
Fair enough.  Could water have gotten into the exhaust or the fuel while you had the top of the engine torn down?
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NoobKevin

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Re: Steam Bath
« Reply #6 on: August 19, 2019, 09:24:42 pm »
I would need to say the odds are unlikely. I plugged the lines and the whole car was covered and under a shelter. I think I made some error and now coolant has access to one or more combustion chambers. I wonder if it is the gaskets I used on the lower intake manifold. They were real thin.
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TopNotch

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Re: Steam Bath
« Reply #7 on: August 19, 2019, 09:37:08 pm »
Were the replacement heads new or used? Did you check them for flatness? Did you check the block for flatness?
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NoobKevin

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Re: Steam Bath
« Reply #8 on: August 19, 2019, 09:43:15 pm »
Remanufactured from Rock Auto. I did not check either for flatness short of a carpenter's square.
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MikeMac

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Re: Steam Bath
« Reply #9 on: August 19, 2019, 09:57:06 pm »
Reman heads from Rock Auto should be of a good quality. I would consider a framing square check was sufficient on those heads. If we were talking used heads that's a whole other story.

A intake gasket could have a bad spot where coolant is leaking into an intake port. It does take much coolant to make a pretty good cloud either. If the oil still doesn't show milky I would run the car for a longer period to sort it out. As long as you make sure it doesn't overheat you will be okay.



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MikeMac

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Re: Steam Bath
« Reply #10 on: August 19, 2019, 10:02:34 pm »
Que all the Rock Auto is horrible stories......LOL
With the previous shop and my personal cars I've spent well over 10k and never had an issue.
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Fierofool

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Re: Steam Bath
« Reply #11 on: August 19, 2019, 10:04:58 pm »
The steam cloud is what happened to my 86 a couple of weeks ago.  I had driven it more than 30 miles that morning.  I stopped for a moment, and when I restarted, it was very difficult to start.  Big cloud of steam came out the pipes.  Pulled it down to the end of Scott's shop and checked the oil filler cap, and it was chocolate mousse. 
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GTRS Fiero

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Re: Steam Bath
« Reply #12 on: August 19, 2019, 10:11:22 pm »
Finally, that story came out.  Check your compression.

On this story, checking cylinder compression wouldn't hurt, but I have seen coolant get into the engine by spillage while the top of the engine is off.
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MikeMac

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Re: Steam Bath
« Reply #13 on: August 19, 2019, 10:19:18 pm »
Fierofool...Is the consensus that you overheated and took out a head gasket?
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MikeMac

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Re: Steam Bath
« Reply #14 on: August 19, 2019, 10:24:53 pm »
NoobKevin....If you pull the plugs to check compression keep them in order of what cylinder you pulled them from and see if they smell like coolant.
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