Engine Surface Corrosion
Thread Starter
Pro
Joined: May 2004
Posts: 551
Likes: 19
From: Morgantown WV
Engine Surface Corrosion
Hi Folks,
I need some advise from all of my obsesive compulsive friends on the Forum
I just bought a new Yukon Denali with 2000 miles on it. The L92 engine typically gets covered with white powdery corrosion and the Power Steering Pump resevoir rusts and corrods badly. MY question is what is the best way to prevent this from happening?? My engine is already starting to corrode. I tried spraying it with LPS1. It looked good initially but as soon as the solvents evaporate the engine looks the same.
Any thoughts or suggestions would be appreciated.
I need some advise from all of my obsesive compulsive friends on the Forum
I just bought a new Yukon Denali with 2000 miles on it. The L92 engine typically gets covered with white powdery corrosion and the Power Steering Pump resevoir rusts and corrods badly. MY question is what is the best way to prevent this from happening?? My engine is already starting to corrode. I tried spraying it with LPS1. It looked good initially but as soon as the solvents evaporate the engine looks the same.
Any thoughts or suggestions would be appreciated.
CF Senior Member
Joined: Feb 2006
Posts: 23,313
Likes: 25
From: Tucson Arizona
I wish I had an answer but living in Arizona corrosion isn't generally a problem. Is this something typical to all vehicles in the area or just your Denali? Is the corrosion more seasonal? Do you think the corrosion is due to moisture or something caustic attacking the engine? Galvanic corrosion seems unlikley.
The company I used to work for had a large research ship. I recall they used to treat certain external engine components with something to prevent corrosion (for moisture and salt primarily). If the dealership doesn't offer any suggestions you might look to some marine corrosion preventative applications. Good luck.
The company I used to work for had a large research ship. I recall they used to treat certain external engine components with something to prevent corrosion (for moisture and salt primarily). If the dealership doesn't offer any suggestions you might look to some marine corrosion preventative applications. Good luck.
Thread Starter
Pro
Joined: May 2004
Posts: 551
Likes: 19
From: Morgantown WV
I wish I had an answer but living in Arizona corrosion isn't generally a problem. Is this something typical to all vehicles in the area or just your Denali? Is the corrosion more seasonal? Do you think the corrosion is due to moisture or something caustic attacking the engine? Galvanic corrosion seems unlikley.
The company I used to work for had a large research ship. I recall they used to treat certain external engine components with something to prevent corrosion (for moisture and salt primarily). If the dealership doesn't offer any suggestions you might look to some marine corrosion preventative applications. Good luck.
The company I used to work for had a large research ship. I recall they used to treat certain external engine components with something to prevent corrosion (for moisture and salt primarily). If the dealership doesn't offer any suggestions you might look to some marine corrosion preventative applications. Good luck.
Le Mans Master
Joined: Jan 2005
Posts: 5,611
Likes: 5
From: Thousand Oaks California
It is normal for non-painted cast aluminum. Is just Al2O3 (aluminum oxide). Nothing to worry about.
This condition is generally worse if the cast aluminum is exposed to a salt environment.
This condition is generally worse if the cast aluminum is exposed to a salt environment.
Last edited by calemasters; Dec 28, 2008 at 11:37 AM.
Thread Starter
Pro
Joined: May 2004
Posts: 551
Likes: 19
From: Morgantown WV
Yup....But.....My LS1 does not have that problem. I wonder if GM changed manufacturing specs / alloys?
Le Mans Master
Joined: Feb 2006
Posts: 5,762
Likes: 4
From: Chandler Arizona
Where I work, if we don't want bare aluminum to corrode, short of anodizing it, we coat it with a chem film called irridite. This works good for machined parts, but it will have various colors if put on a cast surface. We are also starting to phase out irridite because of environmental concerns with the coating.
Personally, I'd just live with the aluminum oxide corrosion.
Personally, I'd just live with the aluminum oxide corrosion.
Thread Starter
Pro
Joined: May 2004
Posts: 551
Likes: 19
From: Morgantown WV
Where I work, if we don't want bare aluminum to corrode, short of anodizing it, we coat it with a chem film called irridite. This works good for machined parts, but it will have various colors if put on a cast surface. We are also starting to phase out irridite because of environmental concerns with the coating.
Personally, I'd just live with the aluminum oxide corrosion.
Personally, I'd just live with the aluminum oxide corrosion.
Race Director
Joined: Apr 2008
Posts: 17,373
Likes: 6
From: Chatsworth California
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Former Vendor
Joined: Apr 2005
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From: South Florida
http://www.autogeek.net/mpt-twelve-l...penetrant.html
Would something like this leave enough protection to rid the discoloring as aluminum corrodes ???
Would something like this leave enough protection to rid the discoloring as aluminum corrodes ???