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Old 02-20-2018, 12:06 PM   #1
SL1Noob
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Default SL2 icky oil

So I bought a 1996 SL2 about 1 month ago for $600. Only real thing I saw wrong with it was it needed some motor mounts and the valve cover was leaking cause some monkey snapped one of the bolts causing the cover to leak a little. I got the mounts fixed but not the cover yet, it doesn't leak that much.

So i checked the oil this morning and nothing. Well I thought that was interesting. So I bought some and went to put it in. Needless to say what I saw when I opened the cap was not oil. See pictures.

I have no engine lights and the engine runs solid.

On a scale of 1 to 10. How screwed am I.
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Old 02-20-2018, 12:47 PM   #2
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Default Re: SL2 icky oil

Yellowish foamy build up under the oil cap is a direct result of moisture condensation. Sludge. As engines breathe, sealed emissions control systems force engines to vent blowby gases from normal combustion leaking past piston rings of all vehicles to create internal crankcase pressures. Blowby gases and moisture settling in motor oil overnight are normally boiled out during driving and fed into the intake air manifold for recycling. Frequent short trips never allows an engine to reach operating temperatures, leaving motor oil with moisture. The sludge under the oil cap is moisture, oil and combustion blowby never heating up enough to separate and leave the engine crankcase. Sludge is normal buildup and usually goes away from regular driving. Driving over 15 minutes or 10 miles on the highway allows the engine to heat up and boil out any sludge build up. If you're concerned about motor oil contamination, replace oil and filter to start out with fresh oil.

And if you weren't aware, you posted in the L-series tech forums where you should be posting in the S-series tech forums where all the S-series members are frequently posting.

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Old 02-20-2018, 12:59 PM   #3
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Default Re: SL2 icky oil

As best I can tell, you've got antifreeze in the crankcase oil. This can have at least three different causes. Since I can't know what the source is I won't go into conjecture regarding this. On your scale of "one to ten" it varies between as low as 4 up to 10 depending upon the cause of the problem.

BTW, you've posted in the L-Series Tech Forum. You might want re-post the message into the S-Series Forum area.

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Old 02-21-2018, 10:42 AM   #4
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Default Re: SL2 icky oil

SL1Noob, fwiw, I would be very happy to be wrong about what I posted previously and very happy to learn that fdryer's posted information is correct!

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Old 02-25-2018, 03:41 PM   #5
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Default Re: SL2 icky oil

My sc2 does that.. it's just condensation.

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Old 02-25-2018, 08:29 PM   #6
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Default Re: SL2 icky oil

I do have a valve cover with a leaky spot in it because of a broken bolt. Not my doing. I planned on fixing it this weekend and got super sick and slept most of the weekend. I plan on replacing the gasket I have extra bolts and the big thick grommets that go with them and got some ez out bits, hopefully I won't have to use them. Also I noticed the hose on the top has a big crack in it so that will be taped/replaced eventually. I think k this how some of the excess moisture is getting in.

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