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Location:
Sydney
Registered:
July 2002
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Polishing alloy engine parts/components
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Wed, 16 April 2003 15:31
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Ok, so I would like to polish some of the aluminium parts and components on my engine.
I have a few photo's here of some guy off a website polishing a 7MGTE alternater.
I have these pics, but what I need is someone to tell me what I need to buy, and where to buy them e.g. buffing tools, polishing cream/paste ect. etc.
I already have a bench grinder for the buff. I have heard it takes hours and hours, but that does not bother me.
Thanks.
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Location:
Wollongong
Registered:
July 2002
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Re: Polishing alloy engine parts/components
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Wed, 16 April 2003 22:01
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I've never done it but as I understand it you'll need some fine grade (1500-2000 grit)wet and dry to remove the casting marks and rough stuff to start with.You need to get it pretty smooth to get a really good polished finish. You don't want to cheat and use courser paper as you'll have scratches everywhere then.
For the polishing I'd use autosol as its pretty course while bring up a nice shine, it looks like the guy in the pictures is using some kind of air tool, you could use a dremel or something, they come with all sorts of polishing wheels and stuff to start with.
You might not need to use the emery paper if the alternator or whatever is pretty smooth to start with, but I was thinking about doing the plenum on my 7m and it would definately have to be sanded first.
You can get all this stuff at pretty much any automotive place, even supa cheap will probably have it.
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Location:
Brisbane
Registered:
May 2002
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Re: Polishing alloy engine parts/components
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Thu, 17 April 2003 00:16
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See the little can in the first pic, next to his hand. Thats what he's using as polish its called "Mothers Mag and Aluminum Polish" or something similar (supercheap had it), worked ok for me when I tried it.
And that was just by hand so you will get a much better finish if you get a buffer or dremel onto it! (As mr supra said I found I had to sand forever to get the casting out of the tappet cover so it does take awhile!)
Cheers
Wilbo
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Location:
Central Coast, NSW
Registered:
May 2002
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Re: Polishing alloy engine parts/components
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Thu, 17 April 2003 00:21
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That looks awesome Wilbo
i'd like to do that to some of my engine bits too Kristian.... we should have a buffing day 
Dan
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Location:
Sydney
Registered:
July 2002
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Re: Polishing alloy engine parts/components
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Thu, 17 April 2003 00:45
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wilbo666------>
Man, that does look awesome !! That is what I want to do with mine. Yours is a perfect example of how good it can tuurn out. I plan to do the intake manifold as well as lots of little things.
Danners-----> Dude, I dont even get time to polish my car, let alone the engine. Maybe if we got stuck into it, we can both do it at the same time and get it done quicker, by helping each other. Sounds like a good idea.
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Location:
Brisbane
Registered:
May 2002
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Re: Polishing alloy engine parts/components
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Thu, 17 April 2003 16:27
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Yep a clean engine is a happy engine...lol I hope anyway!
And who says you can't polish a turd  that is one polished turd! (aka 5ME) lol.
Good luck with the polishing exposition, I'm trying to organize one with my friends one day as well, would help if they weren't so lazy tho!
Cheers
Wilbo
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I supported Toymods
Location:
I renounced punctuation
Registered:
May 2002
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Re: Polishing alloy engine parts/components
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Fri, 18 April 2003 03:30
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Wow! 
Nice work. I'm really glad I sent that head to someone who cares!
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Polishing alloy engine parts/components
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Fri, 18 April 2003 06:07
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hey ppl,
i can definitely recommend some 3M products. i used them for combustion chamber shaping and then polishing. the hard one removes metal easily but controllably, and the soft/fine one doesn't remove much metal but brings up a close to mirror finish. much much much better than starting with any kind of sandpaper..
only problem is i don't know where to get it yet apart from Qantas 
the discs are 25x6x3 for the soft one and number on it is EXL-2S-FN, light grey in colour, the hard one is 25x3x3 and number is EXL-6A-MED, and brown in colour. i'll try to post a pic if anyone is interested. they will save you hours of finger numbing work, i guarantee it (and no, i don't work for 3M, was just so impressed when i used the darn things)
Cya, Stewart
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Polishing alloy engine parts/components
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Fri, 18 April 2003 06:21
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here they are,
just hook them into a dremel or diegrinder or drill, all good...
if ya want to drop into the newtown area to have a look, lemme know
Cya, Stewart
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Location:
Sydney
Registered:
July 2002
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Re: Polishing alloy engine parts/components
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Fri, 18 April 2003 06:41
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Man, that comes up awesome !!! That is exactly what I want to do.
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Location:
Kita-Ku, Sapporo, Japan
Registered:
January 2003
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Re: Polishing alloy engine parts/components
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Fri, 18 April 2003 06:53
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well, i'm on the search for some for my heads (and for Juzzo too ) so when i find them i'll let ya know $ and where, or i might just grab a bunch..
do you have a dremel? or a 3mm or 6mm mandrel (i think that's what they are called?)
these discs come in sizes from 1/2" up to 14"!! i use the 1/2 and 1" for head work, but for larger areas, the 1.5 or 2" would be ideal.
ahh bugger it. if you have a mandrel to mount a polishing pad or similar with a 6mm hole, or are willing to get one (a coupla $ from any bunnings/hardware house) i will send ya one to play with ;D
email me at stewie@unsw.edu.au with your address and i'll post it on monday... if you are in sydney come over and have a look.
i always like to get ppl using good tools and materials, even if it made by an eville company....
Cya, Stewart
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Club Member
Location:
sydney
Registered:
May 2002
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Re: Polishing alloy engine parts/components
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Fri, 18 April 2003 07:11
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Use a bit of autosol polish with the disc and it will last longer and give a better finish, then finish with mothers which is a finer compound
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