z8987 Posted February 4, 2022 Share #1 Posted February 4, 2022 Which of these is correct for a 70 series 1? I put the silver one on the more complete car. black.heic silver.heic Link to comment Share on other sites More sharing options...
z8987 Posted February 4, 2022 Author Share #2 Posted February 4, 2022 6 minutes ago, z8987 said: Which of these is correct for a 70 series 1? I put the silver one on the more complete car. black.heic 1.82 MB · 0 downloads silver.heic 1.95 MB · 0 downloads Link to comment Share on other sites More sharing options...
S30Driver Posted February 4, 2022 Share #3 Posted February 4, 2022 The 2400 valve cover is the correct one in the 2nd picture. Link to comment Share on other sites More sharing options...
z8987 Posted February 4, 2022 Author Share #4 Posted February 4, 2022 14 minutes ago, S30Driver said: The 2400 valve cover is the correct one in the 2nd picture. That's what I thought. Thank you. Link to comment Share on other sites More sharing options...
z8987 Posted February 4, 2022 Author Share #5 Posted February 4, 2022 What's the best way to clean this up. I'm not sure that I want it to shine, unless that's the only choice. Link to comment Share on other sites More sharing options...
siteunseen Posted February 4, 2022 Share #6 Posted February 4, 2022 You can use walmart brand oven cleaner and a local hot water car wash spray.Then aluminum polishing wad or similar. That'd be closer to oem finish. I bead blasted mine and 400? grit sandpaper over the NISSAN then cleared with satin high heat. But that was my preference. The oven cleaner and aluminum polish would be closer to original in my opinion. Link to comment Share on other sites More sharing options...
texasz Posted February 4, 2022 Share #7 Posted February 4, 2022 You could also toss it in a hydroblasting cabinet and clean it up that way. There's a guy in this area who has done that with good results (they really do look nice when he's done). He's just using a homemade hydroblasting cabinet, there are plenty of guides on the internet to build one. 1 Link to comment Share on other sites More sharing options...
duffymahoney Posted February 4, 2022 Share #8 Posted February 4, 2022 Dry blasting the valve cover prior to vapor/ hydro blasting will yield it better looking. Link to comment Share on other sites More sharing options...
z8987 Posted February 4, 2022 Author Share #9 Posted February 4, 2022 What about a buffer, something like this? https://www.harborfreight.com/6-in-buffer-61557.htmlSent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
26th-Z Posted February 4, 2022 Share #10 Posted February 4, 2022 The valve covers are cast aluminum and the original finish is not polished but a dull, natural aluminum. With age, the aluminum corrodes and that is most probably the finish you are dealing with. When I rebuild engines, I take the blocks and machine parts to a machine shop that cleans the parts, engine block and such, in their cleaner tanks. That is how I get my aluminum back to the natural finish. Soda / hydro blasting will provide a similar finish. Media blasting will pit the surface. If you polish the surface, the aluminum will loose its dull, natural finish and become chrome bright, silver shiny. The more you polish, the more shiny mirror finish you will get. 1 1 Link to comment Share on other sites More sharing options...
z8987 Posted February 4, 2022 Author Share #11 Posted February 4, 2022 The valve covers are cast aluminum and the original finish is not polished but a dull, natural aluminum. With age, the aluminum corrodes and that is most probably the finish you are dealing with. When I rebuild engines, I take the blocks and machine parts to a machine shop that cleans the parts, engine block and such, in their cleaner tanks. That is how I get my aluminum back to the natural finish. Soda / hydro blasting will provide a similar finish. Media blasting will pit the surface. If you polish the surface, the aluminum will loose its dull, natural finish and become chrome bright, silver shiny. The more you polish, the more shiny mirror finish you will get.Great points, thank you. Sent from my iPhone using Tapatalk Link to comment Share on other sites More sharing options...
siteunseen Posted February 4, 2022 Share #12 Posted February 4, 2022 Here's some things I remember reading on the stock covers. Same as @26th-Z said. Link to comment Share on other sites More sharing options...
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