Another potential cause for engine mayo

[ryankokesh]

First of all, I realize I might sound crazy.

Backstory: I had a reasonably new ccv system. ~40k on it and it was the winterized version. Ripped it out this spring because I was getting a ton of mayo in the engine. Put a new winter version in. No mayo for the rest of the spring/summer/fall. Late fall I start noticing a little mayo. Gets colder and it gets worse. Doesn't make sense, since I have a 100 mile round trip commute. Now we're caught up to a week or two ago.

The more I think and read about it, the more it seems that the top of the engine isn't getting warm enough. If you think about the design of the oem intake, the snorkel funnels air from the grills into the filter etc. Because I have a gruppe intake, the snorkel is gone. So in theory that means really cold air is rushing over the top of the engine while I'm driving down the highway. And in theory it seems this could be my culprit.

So, I put the snorkel back on to divert the rush of air to the right, and I threw the hood insulation back on for good measure.

Just checked after a week of driving and no more mayo, even though it's been insanely cold here.

:dunno


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[NoVAphotog]

Just checked after a week of driving and no more mayo, even though it's been insanely cold here.


"Mayo...uh...finds a way." - Jeff Goldblum

Let us know if you notice anymore over more time. Also, where/how do you check for it, again? Something that is relatively easy to inspect for I assume?

[ryankokesh]

lol... That it does...

I just checked under the oil filler cap.


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[Oli77]

My Snorkel is on and my hood insulation is intact and I have some mayo in winter.

[ELCID86]

My Snorkel is on and my hood insulation is intact and I have some mayo in winter.

Hood insulation is just for sound deadening.

[wsmeyer]

Hood insulation is just for sound deadening.

I'm not sure about that.

The problem starts when warm damp air comes in contact with a cooler surface, in this case the valve cover. The water in the air then forms water droplets on the inner surfaces of the engine. From there it drops down or runs down the side where it comes in contact with the engine oil. The two won't mix but water is heavier so it works it's way into the oil. When the two go through the oil pump they are forced together in an emulsion.

Insulation under the hood would keep the engine warmer longer and the less temperature difference between the air and the valve cover, the less condensation will firm.

[ELCID86]

I'm not sure about that.

The problem starts when warm damp air comes in contact with a cooler surface, in this case the valve cover. The water in the air then forms water droplets on the inner surfaces of the engine. From there it drops down or runs down the side where it comes in contact with the engine oil. The two won't mix but water is heavier so it works it's way into the oil. When the two go through the oil pump they are forced together in an emulsion.

Insulation under the hood would keep the engine warmer longer and the less temperature difference between the air and the valve cover, the less condensation will firm.

Hmm. Perhaps. :dunno

[ZHPRegistry.net]

I noticed that when I put non Mobil1 0w40 I get a little mayo. No mayo with that oil. Anyone else?

[az3579]

I noticed that when I put non Mobil1 0w40 I get a little mayo. No mayo with that oil. Anyone else?

I got it even with Mobil1 0W-40.


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[ryankokesh]

I noticed that when I put non Mobil1 0w40 I get a little mayo. No mayo with that oil. Anyone else?

I got it with Mobil1, Quartz, and Amsoil.


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[LivesNearCostco]

I got mustard and relish in summer. Cause seems to be picnics.

Actually I never get mayo in the engine but I don't get really cold weather. My car has both hood insulation and intake snorkel.

[ryankokesh]

I got mustard and relish in summer. Cause seems to be picnics.

Actually I never get mayo in the engine but I don't get really cold weather. My car has both hood insulation and intake snorkel.

Sounds healthier than mayo. :dunno


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[Oli77]

I got it even with Mobil1 0W-40.


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Me too.

[09mageec]

First of all, I realize I might sound crazy.

Backstory: I had a reasonably new ccv system. ~40k on it and it was the winterized version. Ripped it out this spring because I was getting a ton of mayo in the engine. Put a new winter version in. No mayo for the rest of the spring/summer/fall. Late fall I start noticing a little mayo. Gets colder and it gets worse. Doesn't make sense, since I have a 100 mile round trip commute. Now we're caught up to a week or two ago.

The more I think and read about it, the more it seems that the top of the engine isn't getting warm enough. If you think about the design of the oem intake, the snorkel funnels air from the grills into the filter etc. Because I have a gruppe intake, the snorkel is gone. So in theory that means really cold air is rushing over the top of the engine while I'm driving down the highway. And in theory it seems this could be my culprit.

So, I put the snorkel back on to divert the rush of air to the right, and I threw the hood insulation back on for good measure.

Just checked after a week of driving and no more mayo, even though it's been insanely cold here.

:dunno


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OMG, so glad i came across this!

[09mageec]

A better way to check to make sure it isn't getting caked up enough to do any damage is to remove the L shaped hose at the bottom right side of the valve cover. Be careful though because the clip mechanism is fragile, just squeeze the raised parts of the clip. If you pull that off and your path for air is narrow you may find yourself in trouble.

Didn't even think about my Gruppe M intake being the culprit though :applause