Engine coat?

[Oldcabin01]

Hey all,

I noticed a strange clear/white coating all over my engine bay. It seems to be flaking off, but is thick in some areas? Pictures are tough to show, but I tried. Is this some protectant from the factory, or something weird going on? 4000 miles on 15 Denali.

TIA!

 

 

 

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[redwngr]

I don't think that's 'factory'

[Travis Whitmore]

Mine has similar crap like that too.

[fondupot]

Its just dust and road debris from the roads and what not. What, did you expect the engine bay to stay pristine forever?

[Badass69]

Use a pressure washer on it and it will look like new again. Yes I have a 2015 Silverado with a 6.2 in it too... they don't implode after being washed lol.

 

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[Oldcabin01]

Lol, Of course I don't expect it to stay clean. It's just that this looks different than road grime. A film of some sort. I'll power wash it and see if it comes off. Wasn't overly concerned, just wondering if others experience the same. Thanks.

 

 

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[Travis Whitmore]

It isn't dirt if it's what mine has. It's like a clear coat all over everything that is flaking off in areas like the rubber intake boot.

[Oldcabin01]

Exactly, glad it's not just me!

 

 

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[TimmyG]

Its probbly some kind of gloss coating like amorall

 

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[SMiller]

There is NO WAY I would take a pressure washer to the engine bay, that is absolutely asking for problems!

 

COP's don't like getting wet and anytime you apply water under pressure you can be assured it will make it into wiring harnesses and connectors.

 

Wipe it down with Armor All if you must but don't use a pressure washer on it.

[Badass69]

There is NO WAY I would take a pressure washer to the engine bay, that is absolutely asking for problems!

 

COP's don't like getting wet and anytime you apply water under pressure you can be assured it will make it into wiring harnesses and connectors.

 

Wipe it down with Armor All if you must but don't use a pressure washer on it.

Lol. Tell my decade old LQ4 that too... and any other vehicle I have owned. If you are inept at doing it, yes don't use one and i suppose i should leave that as a disclaimer. But then again i dont because it doesn't take a genius to figure out you can use a pressure washer and not force water in everywhere it doesn't belong. They are called weatherpack connectors for a reason... you rain the water on and rain it off again. And what cops.... you mean the coil packs that have a foot long spark plug wire that mount on the valve cover like LS'S have for 15 years... they are pretty weatherproof. It's not like a hemi or a Ford engine where water can sit in a well around the plug....

 

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[Travis Whitmore]

Its probbly some kind of gloss coating like amorall

 

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No, it isn't like that at all. Its almost like the crap they coated the under side of the frame and truck with. Its a thin coating like a glaze or shellac for lack of a better term. Sort of shiny. I really noticed it when I removed the intake tube to install my HID's and it sort of flaked off when I was flexing the tube to get it back on the throttle body.

[Gmcant33]

There is NO WAY I would take a pressure washer to the engine bay, that is absolutely asking for problems!

COP's don't like getting wet and anytime you apply water under pressure you can be assured it will make it into wiring harnesses and connectors.

Wipe it down with Armor All if you must but don't use a pressure washer on it.

The old water pressure myth don't worry nothing will happen and armor all is your worst enemy stay away from it.

[RyanbabZ71]

Its just dust and road debris from the roads and what not. What, did you expect the engine bay to stay pristine forever?

6200 miles they can be kept clean. Never seen anything like the op posted. Also looks like a lubricant got in the engine bay and dust/grime attached to it

 

 

 

Ryan

[SierraMyst]

My 2016 has it. It's some type of clear coat painted over the engine to keep it protected.

 

On mine, it mainly on everything rubber such as the radiator hoses. But whoever or whatever sprayed it at the factory wasnt real sharp. They sprayed the radiator hoses, but there over spray on the plastic cover in front of the radiator.

 

They sprayed it on the air box elbow, but there over spray on the engine cover.

 

And it's sprayed so heavy in spots that you see the dried drip marks all over the underbody.it's just a clear coat that I believe they use to protect it from transport.

 

I saw it on the Sierras, but not the Canyon. Maybe it's a Mexico only thing.