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01-16-2019, 02:59 PM | #1 |
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Dark brown gravy for oil
Just getting around to changing the oil in by 8BA after last season. Tried to start to heat oil up before oil change but battery low so turned fairly slow & wouldn't start. Tried priming and choking for a while & figured i had it flooded so let it go for a couple of days & charged the battery. Second try 3 days later fired right up let it get to 150 shut down and drained oil. Noticed it was like dark brown gravy. didn't smell antifreeze but did smell like over rich exhaust. Made me recall the exhaust smelled pretty rich even after running a bit. Can gas in the crank case cause the oil to get dark brown and a bit creamy or just water? I've had a few blown head gaskets in my history but always was a lighter color creamy brown like chicken gravy or lighter. Thjoughts?
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01-16-2019, 03:04 PM | #2 |
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Re: Dark brown gravy for oil
Sounds normal to me
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01-16-2019, 03:35 PM | #3 |
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Re: Dark brown gravy for oil
Maybe. I did run it a lot more this season. Normally change at the end of each season as I don't run a filter. I've done 5 or 6 changes since build & just thought it looked different. Usually black and thinner consistency. Guess I'll go ahead with the change and check again after running a bit just to make sure.
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01-16-2019, 06:57 PM | #4 |
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Re: Dark brown gravy for oil
Probably haven't run it enough.. Makes sure its at operating temp when you dump it.. Then wait for it to cool down a little and jamb your finger up in there and have a good feel around, see how much sludge you got ..or metal if things aren't what they should be
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01-16-2019, 07:10 PM | #5 |
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Re: Dark brown gravy for oil
No filter means you need to change more often.
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01-17-2019, 04:20 AM | #6 |
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Re: Dark brown gravy for oil
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Head leak or worse crack somewhere |
01-17-2019, 04:46 AM | #7 |
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Re: Dark brown gravy for oil
Short trips when engine don´t get up to full working temp for an extended period can give you condensation with sludge as result...so before fearing the worst change oil and take it for a long nice drive.
I see this alot on modern cars to that just drives 10min to the mall and back. |
01-17-2019, 08:12 AM | #8 |
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Re: Dark brown gravy for oil
The water temp does not equate to the oil temp. You really need to drive it for about 20 minutes to get it up to temp.
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01-17-2019, 08:28 AM | #9 |
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Re: Dark brown gravy for oil
Frank Miller X2
I'm guilty also. I've had carb gasket issues (shrinkage) until I start them once a week for about 10 minutes and then the following week the 20 minute drive. The Ford with the 4GC isn't too bad but the 69 Camaro with the Demon (Holly clone) is really susceptible to gasket shrinkage. |
01-17-2019, 09:19 AM | #10 |
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Re: Dark brown gravy for oil
Anthony, I don't remember, are you running thermostates? Any engine needs to get up to a high enough temperature to remove the condensation out of the oil. A lot of starting the engine up and running it for a short time so it doesn't get up to a high enough oil temperature can result in a build up of condensation in the oil.
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01-17-2019, 12:13 PM | #11 |
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Re: Dark brown gravy for oil
Thx, even though I been working vehicles 4 yrs not so much on Flatty’s. Only have the one & hasn’t needed much since installing in my ‘35. Always good to hear from experience @ FB! Let oil drain with plugs out for a few days to air out. Probably change tomorrow along w aluminum powder sealer Kube suggested in another thread for sealing up minor internal coolant leaks. Then weather permitting take a long drive! Checking oil along the way.
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01-17-2019, 01:00 PM | #12 |
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Re: Dark brown gravy for oil
Any recommendations on which to use aluminum powder base, copper powder base or Barr’s has a new carbon fiber base internal coolant sealant?
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01-17-2019, 01:08 PM | #13 |
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Re: Dark brown gravy for oil
Run a good synthetic oil like Shell Rotella or High Mileage Mobil I. Change as often as you need to keep the oil clean. You should be able to read the dip stick through the oil. Get the dirty oil analyzed.
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01-17-2019, 06:19 PM | #14 |
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Re: Dark brown gravy for oil
I wouldn't put the block sealer in until you know you have an issue . . . no reason to fix a problem you may not have.
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01-17-2019, 07:23 PM | #15 |
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Re: Dark brown gravy for oil
Yeah. GM used to add an old bar stopleak tablet or two to each one of their brandy new vehicle coolant systems as a preventative measure. And looked what happened to GM. 8^) Jack E/NJ
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01-18-2019, 10:35 AM | #16 |
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Re: Dark brown gravy for oil
JS, I don’t use Stats in warm weather & usually run it minimally in winter. I realize they like to run a bit hot but always had a problem in warm weather keeping it from under 210 degrees w Stat’s. Engine has been prone to this since new. Read started many threads & assumed after nothing worked except no Stats that block had internal semi blockage issues. Many flushes and many products later I gave up & no stats worked in warm weather so stayed with. Your right in thinking it doesn’t reach temp in the winter so starting & running for 30 mins every couple weeks could have caused the condensation issue.
Thx
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01-18-2019, 10:39 AM | #17 |
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Re: Dark brown gravy for oil
Probably should put stats if running at all in cold weather.
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01-18-2019, 10:51 AM | #18 |
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Re: Dark brown gravy for oil
Water is the cause, either it's not getting hot enough, or you have a leak, gasket, crack. Et. Try a pressure test. Should help you evaluate the condition of your cooling system. Easy to do, won't hurt anything.
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01-18-2019, 01:42 PM | #19 | |
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Re: Dark brown gravy for oil
Quote:
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01-18-2019, 03:37 PM | #20 |
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Re: Dark brown gravy for oil
What's the pn# of the Subaru thermostats I see people using.
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01-18-2019, 03:45 PM | #21 |
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Re: Dark brown gravy for oil
They have been posted several times recently.
Last edited by JSeery; 01-18-2019 at 03:55 PM. |
01-18-2019, 04:56 PM | #22 |
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Re: Dark brown gravy for oil
JS do u have one u think is best?
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01-18-2019, 05:28 PM | #23 |
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Re: Dark brown gravy for oil
I use Stant 45358 thermostats - 180 deg
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01-18-2019, 06:16 PM | #24 |
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Re: Dark brown gravy for oil
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01-18-2019, 06:40 PM | #25 |
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Re: Dark brown gravy for oil
Sounds like anti-freeze in oil to me, seen it before. Al
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01-18-2019, 09:23 PM | #26 |
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Re: Dark brown gravy for oil
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01-18-2019, 09:24 PM | #27 |
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Re: Dark brown gravy for oil
Thx JS too
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01-18-2019, 09:49 PM | #28 | |
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Re: Dark brown gravy for oil
Quote:
You need a good run at 50-60 MPH (or more) to get airflow past the end of the tube to pull crankcase fumes out while drawing fresh air in through the breather cap on the intake manifold. That's why it was called a "road draft tube"; you needed to go fast enough to get a "draft" going at the end of the tube. This is just one reason a PCV system is so much better. It ventilates the crankcase even idling in the driveway! |
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01-18-2019, 10:00 PM | #29 |
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Re: Dark brown gravy for oil
Seems weird that we are talking about Subaru temps (granted it was current discussion lately)..... when it seems like you have choco oil.
Change the oil, see how fast you have coolant in the oil... It'd take a long time for condensation to make your oil into Chocolate milk. Gas will just thin the oil. Not change the color. . Last edited by Tinker; 01-18-2019 at 10:18 PM. |
01-19-2019, 07:53 AM | #30 |
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Re: Dark brown gravy for oil
If you get the oil figured out and still want to add stuff to the radiator I always had good luck using "Alumaseal". You can get it on Amazon, but a lot cheaper at Wal Mart. Chap
https://www.walmart.com/ip/ALUMASEAL...54de9732f23fe4 |
01-19-2019, 09:42 AM | #31 |
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Re: Dark brown gravy for oil
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01-19-2019, 10:47 AM | #32 |
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Re: Dark brown gravy for oil
JS Do u know the correct ones 4 the 8ba?
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01-19-2019, 11:50 AM | #33 |
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Re: Dark brown gravy for oil
Checked Stant listings 13358 or 45358 both fit 8BA so I’ll have a couple as back ups.
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01-19-2019, 01:01 PM | #34 |
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Re: Dark brown gravy for oil
Yep, the 8ba is easier to ID as they had modern style thermostats from the get-go. Sorry about the 59a post, had a computer HD failure and wasn't paying attention!
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01-25-2019, 10:53 AM | #35 |
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Re: Dark brown gravy for oil
Question: I'm Getting ready to change oil, run aluminum powder into cooling syst., & install stats., will the aluminum powder fowl the stats?
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01-25-2019, 11:04 AM | #36 |
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Re: Dark brown gravy for oil
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01-25-2019, 11:43 AM | #37 |
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Re: Dark brown gravy for oil
Thx J
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01-25-2019, 04:04 PM | #38 |
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Re: Dark brown gravy for oil
Oil changed, put stats in, put aluminum powder product in. Ran per instructions on aluminum powder sealer. Cooling over nite. Will test drive take long ride tomorrow and see if cured.
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01-26-2019, 03:09 PM | #39 |
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Re: Dark brown gravy for oil
Took a 1.5 hour drive today, kept the temp at 175 to 190, no sign of white smoke or bubbling in radiator. checked oil a few times stayed a nice light brown clear honey color. Problem seems solved but will check oil frequently.
Thx for tips & ideas.
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