HELP. Oil in intake?!?!?!?!?! - Page 2 - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

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Old 08-25-2007, 11:36 PM   #11
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Just curious, but can you look into the TB with the blade held open and see a source of the oil? Also, does the oil dipstick read within normal fill levels? maybe a bit hight or low?
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Old 08-26-2007, 01:07 AM   #12
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Ok. just got home. ran out and tried to get to the parts store...yes..in the green car...

Missed advance so i ran over to kmart and grabbed a fram temporarily.

it was running ok, but at one point, when i started it when i was leaving kmart, it was surging and making the whole car shake i was like ohhhhhhh sheeet. so i shut it off, jumped out, and changed the filter right there. drove a total of 70 miles tonight after the oil change.

no i did not do anything else. I ran through some engine flush, drained the oil, took off filter, put on new filter, screwed in drain plug, got up, filled with mobil 1. As I was filling tho, i heard this weird pressure/air rushing sound and then i heard this LOUD GLUG, GLUG sound coming from the airbox, and thinking, gee...thats odd. but I continued to fill it, more glug glug and popped on the cap and started her up...backed her off the ramps and noticed the puddle(*). Then I took the video. Thats all I know.
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Old 08-26-2007, 01:36 AM   #13
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Dang, that'* weird. Did she come with a warranty?

There'* only so many places that anything can get into your intake:

PCV, EGR (seems impossible), vacuum lines (shouldn't be connected to anything full of oil that I can think of). Did I miss anything?

Only thing I can imagine, and even then it seems unlikely, is that you filled your valve cover with oil so fast that it got high enough to pass through the PCV system. Problem there is that I think it would still defy the laws of gravity. And I pour pretty fast, without any problems, ever. You'd almost have to have restricted oil return passages to be able to fill your valve cover.

I'm not a gearhead or anything, but I'll keep scratching my head over here.

<edit> I just noticed that you ran some engine flush through it. Any chance that some sludge broke free and blocked those return passages? May be time to pull a valve cover and have a look?
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Old 08-26-2007, 01:51 AM   #14
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don't think so. oil pressure is higher than ever since this change. I think i just overfilled the valve cover a bit and it got into the intake..but still. I was mainly curious to see if i should replace anything since this happened, and now i have the question of why its running a little rough. otherwise, its not throwing a code, oil pressure is EXCELLENT and all other gauges report normal.
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Old 08-26-2007, 01:56 AM   #15
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Well as long as it'* good now...

You'll probably want to clean/drain the corrugated intake tube, if you haven't already. Maybe spray it out with some simple green or something..?

Your MAF is probably coated with oil, which might explain it still not running perfect. I think there'* a thread on how to clean those.

And if there was oil in your intake manifold, it'll probably take a while for that to all make it'* way out. That probably doesn't help the way it'* running either.

That'* all that comes to mind over here.
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Old 08-26-2007, 02:08 AM   #16
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Well I wiped out the corrugated tube thingy, i will clean it further very soon. I just cleaned the MAF not too long ago, but probably wouldnt hurt to clean it again being its probably got oil on it. The only other sensor I'm worried about are the IAC, but I'm not sure what I should do about that. I was thinking thats why it was idling weird, the IAC didn't know what to do. I was thinking about running seafoam in it now just to get out any oil in the intake or anything like that. Or get some GM top engine cleaner aerosol and spray that into the intake.

Anything else I should clean?

On the list to clean/replace:
Replace PCV Valve
Clean MAF
Run Seafoam/GM Top Engine Cleaner
Clean IAC?
Clean IAT?
Clean Tube
Clean Airbox

Is it necessary to remove the throttle body for cleaning? How hard is that to do on a Series I?
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Old 08-26-2007, 02:17 AM   #17
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The IAC isn't a sensor, it'* a valve of sorts. It'll be fine.

The IAT shouldn't really be that fussy. It'* just a thermistor (a variable resistor used to measure heat). A thin coating of oil shouldn't prevent it from working.

I wouldn't think you'd need to remove the TB, unless you wanted to do a serious deep clean on it anyway. I've never done it on a "1", so I can't say how hard it is.
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Old 08-26-2007, 02:23 AM   #18
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I know it isn't, i was just thinking that maybe its gumming it up, and also, I know the IAT is a thermistor, but still, the coating of oil might block quick changes of temperature, not that it really matters, but hey. I still wanna know why it was surging and made the whole car start bouncing. I mean, some serious revolution shaking.

Also was making the exhaust make more noise than usual (was running like some kinda junker) (i will have to get a video of this exhaust, it makes some scary noises)
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