1982 SN Water In Oil
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=41263
Printed Date: April-27-2024 at 2:10pm
Topic: 1982 SN Water In Oil
Posted By: 82NautiqueTN
Subject: 1982 SN Water In Oil
Date Posted: June-13-2017 at 5:46pm
I just bought my first SN last year. Did some maintenance on it over the winter. Updated wiring, installed an electric ignition, new spark plugs, new water pump impeller, changed the oil / filter & a few other things.
So yesterday I took it out to check out everything & if was running a little rough & popping at higher rpms, but I thought maybe everything had to set its self w/ putting the electric ignition in & impeller. So I lifted up my hood & there was steam blowing out of the oil cap vent tube. When I saw that I turned it off right away & pulled the dipstick. It was a milking white, which I know means waters in my oil.
When I first started running it I notice my engine temp when up above normal. I thought maybe my thermostat wasn't opening up. I turned off the engine & let it cooled down. Once it got down to a safe level I started it up & tested it again. This time it didn't go above 165 to 170, but the engine was still popping so I lifted the hood & that's when I saw the steam from the oil vent tube.
My thought would be head gasket or crack in the head. Would a compression test tell me anything other then which cylinder it would be close to?
I could really use some guidance/wisdom on my next move.
Thanks,
Josh
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Replies:
Posted By: 82NautiqueTN
Date Posted: June-13-2017 at 5:47pm
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I meant to say that my engines a 351 W
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Posted By: 8122pbrainard
Date Posted: June-13-2017 at 6:01pm
Josh,
Running a compression test would be my first suggestion but, it won't tell you where the leak is just what cylinder or cylinders are the problem.
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Posted By: 82NautiqueTN
Date Posted: June-13-2017 at 6:09pm
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Thanks Peter! I'll make that my first move.
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Posted By: TRBenj
Date Posted: June-13-2017 at 6:27pm
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Before you move on to a compression test, check and see if you have water in your cylinders. If so, drain the block and manifolds and get the water out of the cylinders. Then do compression test. If it comes back ok, then intake or exhaust manifolds may be the culprit. Exhaust manifolds crack first when overheated per my experience.
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Posted By: 82NautiqueTN
Date Posted: June-13-2017 at 6:38pm
How would do I check to see if there's water in my cylinders? I assumed it was because when I pulled the dipstick it was milky? What's the best way to drain the block & manifolds?
Since you brought up the Exhaust manifolds having a crack. They were dripping some water, but I didn't think that would have anything to do w/water getting in the oil?
The water that pumps throw the engine exits out of the exhaust right?
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Posted By: TRBenj
Date Posted: June-13-2017 at 6:58pm
Pull your spark plugs and spin the engine over. If water comes out then you have your answer. Plenty of other ways for water to get into the oil besides the cylinders.
Cracked exhaust manifolds are not good. The external cracks aren't the large concern, it's the internal ones that you can't see. Nothing stopping water from seeping back into the cylinder(s) if cracked internally. Water is not supposed to mix with the exhaust gas until the aft part of the riser (where it cannot easily flow back uphill).
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Posted By: 82NautiqueTN
Date Posted: June-13-2017 at 7:05pm
Thanks!
I'll check that out. Really appreciate all your help! I'll let you know how it all works out.
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Posted By: MrMcD
Date Posted: June-13-2017 at 9:28pm
I know a timing cover failure on the 460 Ford can dump water in the oil, is that the case with a 351W? I don't know.
If your compression is good and the head gasket intact you can test the engine seal using Air Pressure. I set up a system on two engines this year and was able to pressurize the block by plugging all the water exit holes. I did not test the exhaust manifolds but I did rule out internal leaks with air. Be careful not to exceed 35 PSI if you do this because more pressure can start blowing out good gaskets in your engine.
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