Painting engine case? - Alfa Romeo Bulletin Board & Forums
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post #1 of 43 (permalink) Old 10-09-2019, 08:21 AM Thread Starter
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Painting engine case?

I plan on buffing the pan, sump,front cover,and valve coverto a mirror shine but the case is a pretty rough cast... what about painting it? Is there an "Alfa color" that would be the most awesome? Body color? All suggestions and input is appreciated!
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post #2 of 43 (permalink) Old 10-09-2019, 08:30 AM
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Some folks do, but they weren't painted from new, they were just bare aluminum as you see. Seems like a matter of personal taste.
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post #3 of 43 (permalink) Old 10-09-2019, 11:01 AM
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I plan on buffing the pan, sump,front cover,and valve coverto a mirror shine but the case is a pretty rough cast... what about painting it?
I wouldn't. Paint will insulate the block, holding in the heat. True, the amount of additional heat retained will be small, but ....

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post #4 of 43 (permalink) Old 10-09-2019, 11:06 AM Thread Starter
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That was one of my first thoughts but also thought the amount would be minimal. Wish I had some practical experience to relate to. My feeling is any amount of heat not dissipated is a negative.
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post #5 of 43 (permalink) Old 10-09-2019, 11:16 AM
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IF you paint, make sure to use "engine paint" for heat...if ot it gets burnt and peels

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post #6 of 43 (permalink) Old 10-09-2019, 11:55 AM
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don't paint it, it's beautiful cast aluminium, that's the whole beauty of an alfa engine that is miles ahead of anything else...primitive cast iron blocks get painted sometimes...

try just a small steam cleaner and some brushes.

or, if you want to spend some money, have it professionally vapour blasted... it'll look like new.

btw: it's an alfa, so it's probably gonna get oily again in a few months
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post #7 of 43 (permalink) Old 10-09-2019, 12:12 PM Thread Starter
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All the parts just came back from being hot tanked. Everything is very clean but only the actual block just looks like a crude casting. I do understand though that after everything goes back together the block wont be all that visible. I am warming up the bench grinder though with sandpaper and copious amounts of polishing compound for the other parts. Thanks everyone, I have been convinced to just LEAVE IT ALONE!
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post #8 of 43 (permalink) Old 10-09-2019, 12:33 PM
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Ferrari pre '68 painted all blocks, heads and transmission / transaxle cases. They used a silver paint, the color which is identical to Harley Davidson case paint that is sold in rattle cans. Partly this was because some castings were sand-castings and porous, those had more enamel black paint on the inside to stop oil seep (somewhat). These older Ferrari components all seeped and got messy with time, as it was the nature of those engines. Today the porous castings get pressure treated with epoxy and the new silver paint comes from a paint manufacturer in Indiana near Indianapolis, and that silver does not discolor, chip or oil stain. Some of the restored old V12's no longer ooze or drip oil! Completely NON-ORIGINAL. The lesson here is to paint them CORRECTLY if you want.
Just my opinion from my own experiences and observations over time.


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post #9 of 43 (permalink) Old 10-09-2019, 07:45 PM
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Try Nyalok brushes, they come in various grits and work quite well.


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post #10 of 43 (permalink) Old 10-09-2019, 08:33 PM Thread Starter
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Try Nyalok brushes, they come in various grits and work quite well.


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thanks! I will check them out. ....
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post #11 of 43 (permalink) Old 10-09-2019, 08:54 PM
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I just posted pictures of my freshly painted engine and transmission. Just fun. Also a bit of protection from the elements and easier cleanup. Duplicolor sells alum color if you want the original look.

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post #12 of 43 (permalink) Old 10-09-2019, 09:36 PM
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engine paint?

As Andrew said "it's personal preference" which I tend to agree.
I bought a parts car that P/O had painted the block & head yellow, yes yellow.
I've yet to post it for sale, BECAUSE of the color although it had some new parts installed. I'll just say, not my preference.

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post #13 of 43 (permalink) Old 10-10-2019, 12:04 AM
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156 Series 1 v6 ... and remember it's all just opinions
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post #14 of 43 (permalink) Old 10-10-2019, 04:08 AM
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I also painted the brown, mildew stained wood shingles on my house white. I’m crazy like that.
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post #15 of 43 (permalink) Old 10-10-2019, 08:42 AM
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I couldn’t get my head clean enough. Here are some photos my my motor painted with aluminum engine enamel.

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