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12g940 Restoration


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#1 trafficface09

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Posted 13 March 2010 - 03:30 PM

i have a 12g940 head thst needs a bit of tlc, so whats the best way of removing the rust from the inside of it and stripping the paint. also i would like it to be pocketed for a 998.


i have access to a pillar drill
lathe
acid bath
a dermal with grinding disks or cutting

do you think any of this would help me achive this restoration, im absolutely a novice when it comes to heads.. but im a fast learner and i am ok at engineering

if some kind fellow would give me a step by step id be very grateful and happy

#2 MRA

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Posted 13 March 2010 - 03:36 PM

A dremal won't last long ;)

depending on the acid and the concentration that it is in ? maybe useful for descaling, however I use bead blasting as it gets rid of scale, carbon and rust ;)

Edited by mra-minis.co.uk, 13 March 2010 - 03:36 PM.


#3 trafficface09

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Posted 13 March 2010 - 03:54 PM

A dremal won't last long ;)

depending on the acid and the concentration that it is in ? maybe useful for descaling, however I use bead blasting as it gets rid of scale, carbon and rust ;)



oh i forgot i do have a bead blaster too.

i think the acid is used for etching at uni for printing

#4 MRA

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Posted 13 March 2010 - 04:27 PM

Oh and it's the block that gets pocketted not the head ;)

#5 trafficface09

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Posted 15 March 2010 - 07:39 PM

im starting to think i should buy all my parts from you because your nice ha ha. anyway so what can i paint the head with? standard car paint ok?

#6 shorty

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Posted 15 March 2010 - 07:43 PM

sand blasting works well for cleaning the crap of heads, not sure if its better or worse than bead blasting but as you have access to one id use that.

chemical wash would be the best starting point as it will loosen most of the much off.

as for paint, some standard engine paint works well or some form of heat resistant paint

#7 trafficface09

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Posted 15 March 2010 - 07:48 PM

the head is cleen as a whistle so the problem is the surface rust, i need a quote to get this head sorted, as i dont think i have the time, im thinking is there anyone on here who can do some spec boasting modifications also (within reason as its fitting a 998) and full restoration.

cheers guys

#8 shorty

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Posted 15 March 2010 - 07:53 PM

list up what needs sorted and one of the many people in the know might be able to give a rough estimate

#9 trafficface09

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Posted 15 March 2010 - 08:01 PM

oki doke,

please bear in mind im an idiot regaurding heads, im the bodywork guy, but i am learning the basics on engines ect

its rusty on the inside and needs sorting
paint needs stripping
repainting paul smith blue (its a nice blue)
those springy things look fine
um the underneath round things look shiny and round so they should be.
looks like a simple job, and i am aware there are mods that can increase the heads performance, id like a 998 that can keep up with a 1275 (one day)




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