73-87chevytrucks.com
73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: 9511234 on October 01, 2011, 10:08:41 am
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I have the engine out on a stand, intake and pan dropped. The heads are still on.
What's the best way to clean it up for spray painting some color on the block and heads?
I don't want anything too corrosive that might damage seals, obviously don't want to use water or a liquid that could get in the bottom end of the engine. I had the pan vat cleaned at the engine shop.
If I took it there is there a process there they could use to clean it without taking the heads off or with the block and rotating assembly in place?
Primarily trying to get grease/sludge off the outside. There's a little bit of rust, but nothing the paint shouldn't be able to handle.
Thanks for the help.
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If it is on a rotating engine stand, I would use a degreaser sparingly, one side at a time with a brush and small wire brushes, rotate the engine so you can clean the down side and keep turning, or put your pan back on, and cover (plastic)the other area's and then clean with a solution so as to get the grease off so your paint will stick. Are you painting or coating it with something like por-15.
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Degreaser works well. I also use some brake clean or mineral spirits because they tend to remove the degreaser helping the paint stick. Blowing everything off with compressed air helps well too. Keep the engine inside and warm and make sure the paint can is warm. It tends to flow better out of the can, in my experience.
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make sure the engine as a whole is sealed up, mini wire wheels and compressed air, little bit of brake clean and a scotch brite here and there.
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I use all of the above methods, and also Aircraft Paint Stripper. You will need to be careful not to get it on rubber, and your hands. Once the heavy grime is gone with degreasers and a presure washer. the stripper will take off all the old paint. I presure wash the striper off. Then I wire brush, use a mini grinder with scoth brite wheels, and 36 grit wheels. Also use a 3" DA sander to prep it, and a blow gun. For the rusty areas I use Chassis Saver, and the clean metal areas I use a spray bomb self etching primer
( Transtar brand is a good one ). Then paint with a quality top coat.
Few pics of the last one I did.
(http://i136.photobucket.com/albums/q165/BlazinK30/86%20GMC%20rebuild/IMG_4553.jpg)
(http://i136.photobucket.com/albums/q165/BlazinK30/86%20GMC%20rebuild/102_0476.jpg)
(http://i136.photobucket.com/albums/q165/BlazinK30/86%20GMC%20rebuild/102_0477.jpg)
(http://i136.photobucket.com/albums/q165/BlazinK30/86%20GMC%20rebuild/102_0478.jpg)
(http://i136.photobucket.com/albums/q165/BlazinK30/86%20GMC%20rebuild/102_0484.jpg)
(http://i136.photobucket.com/albums/q165/BlazinK30/86%20GMC%20rebuild/102_0483.jpg)
In the truck.
(http://i136.photobucket.com/albums/q165/BlazinK30/86%20GMC%20rebuild/IMG_4561.jpg)
(http://i136.photobucket.com/albums/q165/BlazinK30/86%20GMC%20rebuild/102_0488.jpg)
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Hey blazin, is that cat yellow paint. ;D
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Why yes, it is. Thanks for noticing!! Meoow!! ;D
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Hi guys, I don't have access to "cack" paint ;D
Once it's cleaned and etched, would normal 2k paint survive the heat?
I've heard several stories blah blah only use enamals etc?
cheers
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http://www.hirschauto.com/prodinfo.asp?number=EE-QUART
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;) cheers Vile. Next to decide the colour!
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What color is the truck?
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You mean you haven't been following ::)
Orange with black roof & black strip down sides.
Thinking orange inner fenders and a black & silver engine?
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Wasn't sure that's what you are working on here but yeah black looks nice
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It was either black/silver or silver/black. Can't think of many other colours that would compliment the orange!
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Why not black and orange?
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I want it to stand out a bit. Thought black/orange would be too bland?
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My engine block, heads, intake, water pump are Chevy Orange, and my valve covers, oil.pan, and bracketry is black. I like it a lot, and I havent seen many engines like it.
(http://cache.msm-images.myspacecdn.com/msm300jpg75/images02/117/l_c778b718b2ed499d904f27185a4e8bd1.jpg)
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(http://cache.msm-images.myspacecdn.com/msm300jpg75/images02/138/l_369e2ba6f1884b65b43a5d792aa27820.jpg) heres a picture of it in the truvk
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Yeah I have never seen a Cat yellow Chevy motor either! Was thinking I might do my next one Cummins biege! :D
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Yeah I have never seen a Cat yellow Chevy motor either! Was thinking I might do my next one Cummins biege! :D
Cummins Beige - like old mens trousers (pants)
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Cummins motors in heavy trucks have come in several colors over the years, biege, red, gray, have even seen a few white ones. I just like the military no nonsense look of the biege color they used.
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Just to revive this as I'm nearly finished cleaning!
Etch primer - normal etch for bare metal or is there a different type for heat i.e engine?
Silver and black paint at the ready!!
cheers all
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Just to revive this as I'm nearly finished cleaning!
Etch primer - normal etch for bare metal or is there a different type for heat i.e engine?
Silver and black paint at the ready!!
cheers all
In the industrial applications normal etch primer is "usually" for an air dry/force dry top coats up to about 200 degrees. When tried under a baking enamel the etch primer breaks down and some/all adhesion to the metal is gone. I know you are talking about an air dry type paint but the temperatures of the engine is like a baking type paint. I would check the temperature limits to the etch primer. I would think a good clean surface is adequate for any high heat engine type paint... I would hate to see you go through all that work using an etching primer that flakes off after the engine reaches operating temps...
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I went for the POR-15 engine enamel, best I check out the label!
cheers dude
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I have used Transtars spray bomb self etch primer on several motors for the bare metal, and had no problems with breakdown. Chassis saver on the rusty ares, and then top coated with engine enamel. No problems what so ever. Matter of fact when i had my truck on the lift over the weekend I used a rag sprayed with brake clean to clean up my oil pan as it was covered in road grime, and a little ATF from the plow pump.