|
|
Post by Rob Sannes on Dec 23, 2019 17:59:52 GMT -8
So my 2017 project is starting to come together for my 56 and I want to spiff up my crank case so I need advice on a good method and products to painting this low milage magnesium case.  I have used semi gloss enamel in the past and it worked ok. Was thinking of a raw aluminium sort of colour . Your thought would be appreciated. Cheers Rob |
|
|
|
Post by Brenticon on Dec 23, 2019 18:21:34 GMT -8
An acquaintance of mine in Saskatchewan just did this ..? imgur.com/gallery/6EIKJpK(sorry bout the link) He glass bead blasted, then a light touch with a wire wheel |
|
|
|
Post by Brenticon on Dec 23, 2019 18:22:26 GMT -8
|
|
|
|
Post by Brenticon on Dec 23, 2019 18:23:12 GMT -8
Sorry. Working from a phone.
Before and after pics
|
|
|
|
Post by Rob Sannes on Dec 23, 2019 18:41:07 GMT -8
Looks pretty good but I won't bead blast this case. I'm nervous I would never be able to get all of the media out of it. I should go talk to Keiran and see if I can wrap it.
|
|
|
|
Post by Volktales on Dec 24, 2019 13:09:57 GMT -8
Bead blasting the case is usually not recommended, as keeping the grit out of oil passageways is difficult. I have done it before, and am unlikely to do it again. Painting of the case for cosmetic reasons inspires lots of for and against opinions on TheSamba. Some say not to, as it could prevent proper cooling. Others say that is complete BS, and paint away. There are even arguments about colours in regards to heat dissipation. VW Canada used to paint their rebuilds, usually a light gold-ish colour, and many aftermarket rebuilders paint them for appearance purposes. On one of my engines, I experimented a bit with that rust remover solution containing phosphoric acid. This did brighten up the magnesium case substantially, but as we all know, magnesium darkens fairly quickly. Have no idea if phosphoric acid on magnesium is a good idea or not... I would say if you want to paint it, then go ahead. Just use quality paint and make sure the case is clean as possible for maximum adhesion...
|
|
|
|
Post by owdlvr on Dec 24, 2019 13:56:40 GMT -8
Eek, definitely don't use glass beads. I understand you can soda blast them (baking soda, basically), but I've only ever hot-tanked them. Any transmission repair shop should be willing to clean your case for you in their hot-tank. I usually pay in beer, they come out sparkling clean and ready to paint.
|
|
|
|
Post by Volktales on Dec 24, 2019 14:09:24 GMT -8
Traditional "hot tanks" are generally for iron and steel parts only. Usually most places use the "dishwasher" type cleaning machines for aluminum and alloys. Neither will remove corrosion, if present.
|
|
|
|
Post by owdlvr on Dec 24, 2019 14:16:01 GMT -8
Okay, fair, I was using the more common "hot tank" term. But yeah, it's a dishwasher with water-soluble cleaning solution. Will clean all the oil / grease / crap off the case. But yes, won't eliminate any corrosion. I've never had a problem myself, but I sure as hell wouldn't bead blast an engine case. How corroded are people's engine cases? I've certainly had evidence of corrosion, but nothing that continued after a good cleaning.
I can't find a single case of "bead blasted and my motor is fine"...but lots and lots of "bead blasted, cleaned out the oil passages, motor blew up in the first 500mi"
|
|
|
|
Post by Volktales on Dec 24, 2019 14:27:37 GMT -8
I blasted an extremely corroded case years ago, but it was a last resort to attempt to save a numbers matching engine. This was long before internet access, and lets just say it was not successful for all the reasons you would think. I did not want to again, but had to given the next project case had been previously poorly painted, and paint stripper just softened the paint, but would not remove it. I took every precaution to plug all galleries so the abrasive could not enter, and VERY carefully cleaned it out afterwords. Although successful, I would still never recommend this procedure to anyone...  |
|
|
|
Post by Brenticon on Dec 24, 2019 14:57:51 GMT -8
Wtf do I know anyways
|
|
|
|
Post by Volktales on Dec 24, 2019 15:03:04 GMT -8
You probably know how to make the perfect lasagna. I am still working on that. My first meatloaf last night was amazing however.... |
|
|
|
Post by Rob Sannes on Dec 24, 2019 15:46:34 GMT -8
Thanks for the replies Guys. I likely wouldn't paint the 2017 it if it wasn't going in to my 56. It has a pretty and shinier aluminum case. So I want to make the 2017 close in appearance. I will be using the gray powder coated tins from the 56 also. I stopped and looked at spray bombs for 15 minutes, got frustrated and left. I need to make a decision on the primer and topcoat. Likely a zinc chromate primer and a engine enamel. I will stay away from the super high temp ceramic sort of paint.
Happy Holidays all
|
|
|
|
Post by Rob Sannes on Dec 29, 2019 17:31:14 GMT -8
|
|
|
|
Post by Brenticon on Dec 29, 2019 19:58:38 GMT -8
Purdy
|
|
