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Kia Sedona Sludge #5175346 07/31/19 03:04 AM
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writes123 Offline OP
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Hi all.

Recently acquired a 2015 Kia Sedona with 101k miles. Van was bought off Manheim from a bank repo and looked pretty clean. Out of the abundance of caution, I scheduled a ATF and coolant fluid exchange along with spark plugs replacements (105k due) and valve cover gasket with plug seals along with plenum gasket replacement. New plugs were NGK ruthenium HX. The day before I just did an oil change and the filter housing cap was a pain to get loose - needed a good strap wrench along with a 27mm 6 point socket to remove the cartridge filter and it was covered in sludge. Put in a new Wix filter along with Penzoil Ultra Platinum 10W-30. The mechanic recommended I use some engine flush after seeing the valve covers. I had some Lubegard Engine Flush on hand and proceeded to add a bottle, run the engine on idle for 20 mins then drain the oil. Checked the filter and it had some crud but reused it and added new Supertech Full Syn HM 10W-30 and another bottle of engine flush, ran it for 20 more mins on idle and then drained the oil, refilled with more ST Full Syn HM 10W-30 and a new Fram TG10855. I am planning on another engine flush soon but considered running the oil and filter for around 1k miles before adding a flush before the next oil change. The oil pan was not dropped. I believe the lower pan uses a gasket sealant. Have not located the PCV valve yet. I also purchased a small oil catch can but have not installed it yet. Engine is the common 3.3 V6 GDI Kia engine. My first DI engine.

Any advice or thoughts on how to proceed next would be greatly appreciated!

67394248_464003017512680_5468027953797398528_o.jpg67249059_464003084179340_7616391438732886016_n.jpg67402249_464003334179315_1748671904224378880_o.jpg67389576_464004694179179_1511937395677724672_o.jpg
Re: Kia Sedona Sludge [Re: writes123] #5175363 07/31/19 05:13 AM
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demarpaint Offline
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Good luck cleaning that mess up. I hope it runs well for you. Honestly I think disassembly and hand cleaning would be best. Meaning remove the valve covers and clean whatever you can see, drop the oil pan clean whatever you can see along with the pickup tube and the screen for the pump. Then use your favorite slow engine cleaner with short oil and filter change intervals. Keep an eye on the oil level.


God Bless Our Troops

Re: Kia Sedona Sludge [Re: writes123] #5175366 07/31/19 05:27 AM
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berniedd Offline
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Get as much of that crud out of there. Use something pointed and sharp to chisel off the more stubborn deposits. Vacuum out all that get freed. You have to drop the pan as the scenario there is likely the same as the top of the engine. Check the cyl head gasket and cooling system. That brownish goo suggests coolant mixing with the oil.

Last edited by berniedd; 07/31/19 05:36 AM.
Re: Kia Sedona Sludge [Re: writes123] #5175372 07/31/19 05:49 AM
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Pick up some spray cans as well as a bottles of Berryman B-12 Chemtool (you are going to need quite a bit). Drop the oil pan and spray the upper engine with the Berryman and pour some of the Berryman liquid into each of the cylinders. Let it sit over night. Take a nylon brush and continue spraying and cleaning the head. Rinse and repeat for the lower engine paying particular attention to the oil filter pickup screen. Reassemble and run a short OCI of about 100 miles and then repeat another for about 500 miles. This will be as clean as you are going to get it without completely disassembling the engine.


2019 o)|||||(o Rubicon Wrangler Unlimited 3.6L V6 [Castrol Edge 0W-20 + FRAM Ultra]
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Re: Kia Sedona Sludge [Re: writes123] #5175483 07/31/19 08:51 AM
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Miller88 Offline
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For some reason it seems more milky that oil sludge should? Or is it just weird lighting on the photos. I wonder what the possibility of it having a bad intake gasket or head gasket or something causing it to mix a bit of coolant in the oil - or maybe it's suffered extreme short tripping?

I wouldn't do anything too crazy to remove it flush wise, I would be afraid of having to take the pan off to clean the oil pump strainer. Maybe suck what you can out of the head with a vacuum, then try the B12 / Seafoam / Etc?


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Re: Kia Sedona Sludge [Re: writes123] #5175490 07/31/19 09:08 AM
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MichiganMadMan Offline
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First of all: Those pictures are what nightmares are made from.

I bought an [ab]used Chevy Aveo a couple of years ago that had very similar buildup of snot inside the engine. It was a 2009 and they are notorious for oil cooler leaks. It had external oil seepage that I was willing to live with, but when I had to chase a valve cover PCV hose that was cracked and alternately sucking air or spewing oil all over that I found the mess it was making inside. I wish I had taken a picture but I was deep into it and working against a deadline.

Contrary to some of the more "roll up your sleeves and get in there" recommendations, I just put a new oil cooler on to stop the coolant cross-contamination and cleaned only what I needed to in order to get the gasket to seal properly. The oil pan is part of the bottom of the engine in this application and I already had most of the top of it taken apart and didn't want to turn an $1,800 beater into a resto-mod. I just changed the oil early a few times and it's been cleaning up slowly on it's own. I'm of the opinion that, as long as the oil can drain back to the pan, short OCI and not dislodging all the cholesterol at once is a better path. The first few OCI turned black and "gooey" in less than 1,000 miles and is slowly getting better. I used whatever odds and ends of oil that I had lying around. It's under powered for traffic around here so I run it WOT for every acceleration. So far, so good.

Your mileage may vary.


2015 Chevrolet Impala
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Re: Kia Sedona Sludge [Re: writes123] #5175555 07/31/19 10:24 AM
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1978elcamino Offline
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Why not use diesel oil. I believe that would provide the most cleaning affect for oil by itself. Maybe ST 15w40 or better yet a 5w40.


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Re: Kia Sedona Sludge [Re: writes123] #5175561 07/31/19 10:31 AM
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Gasbuggy Offline
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I would get one of those buckets with the hand pump on it, drain the oil, fill the pump with solvent, remove the valve cover and cycle away.

Last edited by Gasbuggy; 07/31/19 10:31 AM.
Re: Kia Sedona Sludge [Re: writes123] #5175565 07/31/19 10:35 AM
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JLTD Online Shocked
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I have seen worse that was cleaned up with shorter intervals and no heroics. As mentioned above, your mileage may vary but with that build up I would use a good cleaning oil at shorter intervals and have another look under the valve covers after three or four cycles.


I use the overseas manual to choose my viscosity.

Using AMSOIL

Hers: 2008 Jeep Liberty 154k, SS 5w30/Amsoil

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Re: Kia Sedona Sludge [Re: writes123] #5175573 07/31/19 10:41 AM
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JTK Offline
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Being a 2015, the poor thing probably never had an oil change. I'd probably wipe out as much gunk as I could and do 3-4 short succession OCIs. If you could easily get to the oil pan, dropping that would be interesting, but hopefully the build-up is just up top and not on the pickup screen.


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2016 Nissan Quest SV (Babe magnet IV)
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Re: Kia Sedona Sludge [Re: writes123] #5175590 07/31/19 10:57 AM
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Anduril Offline
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You could take it apart and meticulously clean everything, but personally I'd just run some 10w-30 HDEO on shorter OCIs and maybe throw in some MMO. Should take care of it over time.


2015 Nissan Versa Note 1.6/5MT
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2007 Toyota Camry 2.4/5AT
2005 Nissan XTerra 4x4 4.0/6MT
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Re: Kia Sedona Sludge [Re: writes123] #5175606 07/31/19 11:24 AM
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geeman789 Offline
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Originally Posted by writes123


Recently acquired a 2015 Kia Sedona with 101k miles. Van was bought off Manheim from a bank repo and looked pretty clean.




Ummm, sure ... on the outside. The previous owner couldn't make the car payments, and probably did ZERO maintenance of any kind. Hope it was really cheap ...


2011 SUBARU Impreza 5-door manual / 2016 HONDA Pilot / 2011 MAZDA 2 auto
Re: Kia Sedona Sludge [Re: writes123] #5175614 07/31/19 11:34 AM
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Chris142 Online Content
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That grey/tan goop looks like coolant or water mixed in.


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87 F250 Valvoline 15w40
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Re: Kia Sedona Sludge [Re: writes123] #5175626 07/31/19 11:54 AM
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jcartwright99 Offline
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There are a few cars that I would never buy used unless they had the maintenance records. Kia, lower end Nissan, and lower end FCA products. Why you ask? These manufactures usually pray on subprime buyers and have the lowest priced cars available. In my experience, these subprime buyers tend to not do the recommended maintenance. They can just afford the car payments and gas. This is what you get. Sure, I know not every subprime buyer neglects their car but why risk it?

Re: Kia Sedona Sludge [Re: jcartwright99] #5175657 07/31/19 12:31 PM
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02SE Offline
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Originally Posted by jcartwright99
There are a few cars that I would never buy used unless they had the maintenance records. Kia, lower end Nissan, and lower end FCA products. Why you ask? These manufactures usually pray on subprime buyers and have the lowest priced cars available. In my experience, these subprime buyers tend to not do the recommended maintenance. They can just afford the car payments and gas. This is what you get. Sure, I know not every subprime buyer neglects their car but why risk it?


People of all socioeconomic classes neglect cars.

That was the case when I was working on consumer cars, and according to friends and former colleagues who still work on consumer cars, that is still true.

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