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Cleaning An Aluminium Engine Block

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6K views 31 replies 7 participants last post by  Keith-n  
#1 · (Edited by Moderator)
Hey all,

Picked up an M52 6cyl and a V12 to make some furniture for our pending house purchase. v12 will be the coffee table and the M52 a 6 pot wine rack and a table lamp stand in one.

Been reading alot and some folk say sandblasting is too rough, bead/soda blasting is best. Was onto sodablast.ie and they want excessive money for blasting just the V12. So while we debate the best method and who gives the best price / service i'll need to be cleaning the engine myself of the heavier grease etc.

So whats the best methods and for the detailers, what products do you have for me and a little info incl price on whats available and methods.

I've attached a pic of the M52 so we can see the deposits for removal, especially the carbon build up in and on the piston's.

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#2 ·
scrub as much off as you can with petrol and paint thinners and than once dry start sanding it by hand with some rough P80 and work your way to a finer sand paper depending on what finish your looking for. are you planning on painting it?

id nearly say sand it down and paint it and get the top face skimmed so there is a nice smooth shiny side and make up some brackets for the legs eith chrome them or paint black and there you go if you could put a touch sensor into the lamp one that would be nice no switch by touching the block it comes on touch it again it get brighter and touch it a third time it turns off i had a lamp like that before.
 
#3 · (Edited by Moderator)
QUOTE (gti-ronan @ Feb 28 2012, 05:09 PM) <{POST_SNAPBACK}>scrub as much off as you can with petrol and paint thinners and than once dry start sanding it by hand with some rough P80 and work your way to a finer sand paper depending on what finish your looking for. are you planning on painting it?

id nearly say sand it down and paint it and get the top face skimmed so there is a nice smooth shiny side and make up some brackets for the legs eith chrome them or paint black and there you go if you could put a touch sensor into the lamp one that would be nice no switch by touching the block it comes on touch it again it get brighter and touch it a third time it turns off i had a lamp like that before.

For now it'll be just cleaned. Once she has decided the colours for the room i'll decide on finish. But i will paint the M52 and undecided on the V12.
The lighting and if/if not to put touch sensors etc into it is all a bit off yet.

As for legs etc the glass will be mounted off the pistons as below....

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And obviously the Bmw engine for lamp stand / wine rack will be stood upwards and the same piston method used to mount glass.

So you are saying petrol / thinners and various grades of sand paper will be enough to clean it off as opposed to buying chemicals?

I do like the painted / polished look

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#7 ·
Soak it in a bath/barrel of coke for a few days..
 
#9 · (Edited by Moderator)
QUOTE (Murph81 @ Feb 28 2012, 05:47 PM) <{POST_SNAPBACK}>Sorry, read that in a bit of a hurry, post edited.

Well they charge €90 a wheel for blasting colour powdercoat and laquer powdercoat, surely blasting the blocks can't be that dear.

€220 for the block. Nearly fell off the fuggin chair.

Will dig out some details for blastec, nice one.
 
#12 ·
QUOTE (Murph81 @ Feb 28 2012, 10:03 PM) <{POST_SNAPBACK}>Thats saucy enough alright, was that with soda or some other media?

Blastec are more of an industrial setup, I'd say sodablast would handle it better but that quote is a bit much alright.

His reply was bead/soda blast €220 for the V12 pending inspection. I'll just sand it real good and paint it f thats the deal but you'd think with sand blasting being so cheap that other forms of blsting wouldn't be a massive jump such as this.

Other media's are charged by the hour. Surely a block wouldnt take multiple hours........Let alone €220 worth of hours.
 
#14 ·
I reckon sandblasting would be fine for them keith, itd not like the engines are gonna run again! All ya wanna do is clean them! If your gonna paint them then id definetely be ok with sandblasting. A sandblasted finish looks like this!
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And finished up like this
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That was a DOHC VTEC Rocker cover I did for a buddy, Im in bandon aswell and have a sandblasting cabinet but I doubt the engines would fit into it unfortunately!
Sandblasting would be alot cheaper than sodablasting!
If you have a compressor handy you could always buy a cheap ass blast gun and a bag of grit for €30 and DIY!
 
#15 · (Edited by Moderator)
Also, the above finished paint on the rocker cover was not sanded down after blasting, just washed, dried and rattle can painted and lacquered. The only bits sanded was the writing! Just to give ya an idea of the finished product!

BTW, have ya thought about wrinkle paint as a finish? I know it can be a bit gawdy depending on the colours in the room its going into but it looks dam cool!
 
#17 ·
QUOTE (truenut @ Feb 29 2012, 09:19 AM) <{POST_SNAPBACK}>I reckon sandblasting would be fine for them keith, itd not like the engines are gonna run again! All ya wanna do is clean them! If your gonna paint them then id definetely be ok with sandblasting. A sandblasted finish looks like this!
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And finished up like this
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Thanks for that. Nice work. Theres chap in timoleague who only charges 20 an hour. Pretty sure kevin kelleher out in ballinscarthy does it too.

I'll have a look-see at this other paint finish your on about, TBH i'm not very familiar with it.

And for the chap who was asking whats the V12 out of...... Bmw 850. Both engines are bmw, Bmw's are where my heart lies.
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@ Glenn, i'll keep him in mind. The engine will need to come down from my dads in dublin to cork for inital prep o would prefer to keep it here in cork. No point whinging about cost if i'll drive the block around the country just to save a few pound.
 
#18 ·
A tin of nitromorse?
 
#20 ·
QUOTE (PaudieG60 @ Feb 29 2012, 01:32 PM) <{POST_SNAPBACK}>Not sure if Kevin does it but the fella who used to be where Kevin is does it in his new place,its sign posted before you come into the village.

One of the lads who used to work there did loads of stuff for me and primed it aswell for small money {he was using fresh sand at the time so flew tru all the bits i had}

Yeh i rememebr alot of kevins inital advertisments had sandblasting on it. I'm also unsure if he still does it. The other chap is just half a mile back up off the cross to tullig. I'm coming round to the idea of good clean, short stint of sandblasting, That wrinkle finish is cool, actually have a honda in the garden with a mugen ocker done in it, was just unaware of the name when poted above.

A quick look in google images showed some nice black wrinkle with polished aluminium finish. So it'll be along the lines of the ÂŁ1500 jag V12 table i posted above.
 
#21 ·
The wrinkle finish is cool alright but tricky to do correctly! Ive done a few bits with it now. I got it from Car builders solutions in the uk, its expensive but they include their own How to guide with the wrinkle paint so its a huge help! I have a couple of cans of red wrinkle paint sitting at home if their any good tya!

BTW Keith, Did I see you up at the cross roads beside the old still today? I was driving a white mk5 golf with Gti alloys!
 
#22 · (Edited by Moderator)
If I was doing it for my house I'd like to build it myself, do as much of the "work" as possible..

What I'd do is, before stripping it down I'd fill the cylinders with coke, leave a few days and then clean with wire wool or similar.. (you could hone the cylinders for that "metal look" if you wanted).. If I wanted the bare metal look with the block, I'd use nitromose to strip the paint.. If you the wanted it all polished looking I'd use sand paper to polish.. A piece of laminated, safety glass or "bullet proof" (say 50mm multi layered glass) as the top, and top it off with 4 - 6 heavy duty castor wheels for easy movement..

Cost a couple hundred all in at most and you'd have the satisfaction of knowing you "created" a "modern art" piece of furniture for your home.. Use the money saved for nice wine or whatever tipple you fancy...
 
#23 ·
QUOTE (truenut @ Mar 1 2012, 01:12 AM) <{POST_SNAPBACK}>The wrinkle finish is cool alright but tricky to do correctly! Ive done a few bits with it now. I got it from Car builders solutions in the uk, its expensive but they include their own How to guide with the wrinkle paint so its a huge help! I have a couple of cans of red wrinkle paint sitting at home if their any good tya!

BTW Keith, Did I see you up at the cross roads beside the old still today? I was driving a white mk5 golf with Gti alloys!

Red is prob a bit too flash for the sitting room. It'll be black finish i would imagine. I should be able to get my hands on it here. Down the marina.

And No, not today. If it was driving a car then defo not. do you have a name? I may know you from outside of vagdrivers if your local ish.

QUOTE (babyface @ Mar 1 2012, 01:36 AM) <{POST_SNAPBACK}>If I was doing it for my house I'd like to build it myself, do as much of the "work" as possible..

What I'd do is, before stripping it down I'd fill the cylinders with coke, leave a few days and then clean with wire wool or similar.. (you could hone the cylinders for that "metal look" if you wanted).. If I wanted the bare metal look with the block, I'd use nitromose to strip the paint.. If you the wanted it all polished looking I'd use sand paper to polish.. A piece of laminated, safety glass or "bullet proof" (say 50mm multi layered glass) as the top, and top it off with 4 - 6 heavy duty castor wheels for easy movement..

Cost a couple hundred all in at most and you'd have the satisfaction of knowing you "created" a "modern art" piece of furniture for your home.. Use the money saved for nice wine or whatever tipple you fancy...

Nitromors a bit acidic for aluminium? I've used it to rip paint off bonnets for rat yokes but wouldnt have been a first choice for unrusted aluminium. I do agree that i will want to do as much as possible myself. Defo on the V2 as its going to be well unique given its a v12 out of an 850, wont be too many others floating around.

The glass will be thick, round egdged but as for what when which how...... all yet to be decided. I'm a god bit off that stage yet.

Nice one.
 
#24 · (Edited by Moderator)
Nitro morse will just strip the paint, wash it of with soapy water and it shouldn't damage the metal/finish.. Try it on the underside first and see what results it produces.. I'd try make it look mechanical/industrial looking, fancy paint or finishes may take away from the look IMO..

Or what about acid dipping? They'll dip it in acid and then neutralise the acid, it'll strip everything bar the metal if done right..
 
#25 ·
QUOTE (babyface @ Mar 1 2012, 03:40 PM) <{POST_SNAPBACK}>Nitro morse will just strip the paint, wash it of with soapy water and it shouldn't damage the metsl/finish.. Try it on the underside first and see what results it produces.. I'd try make it look mechanical/industrial looking, fancy paint or finishes may take away from the look IMO..

Or what about acid dipping? They'll dip it in acid and then neutralise the acid, it'll strip everything bar the metal if done right..

I'd be more along the lines of a nice paint finish add's to the piece. I've a 2l drum of nitromor's out in the shed, i may try some the next day i'm out there.

I still feel blasting is the way forward.
 
#26 · (Edited by Moderator)
No i dont have a name,i get called dick alot tho,cant figure out why!
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Martins da name,from ballineen but livin in bandon wit da missus! Went to the tec once upon a time! Guessin u were drivin a tractor so judging by da slats in the background of your first photos! Sorry for vie off topic by the way! I might be able to blast there 6 cyl for ya if u wanna try it,should be able to fit it in the blast cabinet but very much doubt if the v12 will fit!