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AndyFielder
05-03-2007, 11:12
Hello all,

I have bought the head into work... a chemistry lab to see if i could get is clean.

tryed acetone and .5M HCL but have only made it shinyer... i want to remove the black clouds in the metal. Anyone got any ideas. How do the pros clean them up?

do they clean then spraypaint over to make it lookperfect?

cheers

Andy
MAXIBOY
05-03-2007, 11:53
there usually placed in an industrial dishwasher and steamed and sprayed with an industrial cleaner such as gunk
Scougar
05-03-2007, 11:57
After having heads chemically cleaned before at engine places, make sure you check for swarf inside the head (from your's or other heads in the washer) if you get it down at a pro place.

Matthew
AndyFielder
05-03-2007, 13:19
chucked mine in the washing mashine here at work...

Hot acid and chlorine wash with a rinse .. loats of steam when i open it!

we shall see when i get back after lunch how much of it is left!!

i cleaned the worst off with parafin.

Would people then spray the head (normally) to make it all the same grey or keep as it is?
MAXIBOY
05-03-2007, 13:21
left mine as is.
AndyFielder
05-03-2007, 13:54
looks pretty good .. very impressed!!

how much does head disassembly and cleaning cost?

I have been told the machine will break with the bottem end.

Im thinking parafin... sand down... acetone ... dry .. paint back (crackle effect) .. atleast thats what i think its called.

Anyone know what the paint is really called?

Andy
VIPERONE
05-03-2007, 15:38
http://i4.photobucket.com/albums/y109/gunnergibson/machinery1.jpg

here was mine when redone:

http://i4.photobucket.com/albums/y109/gunnergibson/head.jpg
http://i4.photobucket.com/albums/y109/gunnergibson/camms.jpg
http://i4.photobucket.com/albums/y109/gunnergibson/headone.jpg
VIPERONE
05-03-2007, 15:39
done in a blaster machine
BenR
05-03-2007, 16:03
I'd only reccomend vapour blasting or soda blasting, anything else is way too harsh.

If its heavy carbon on then you'll want to soak it in carbostrip, then do the normal aqueous based hot tank and final dry solvent rinse.
VIPERONE
05-03-2007, 16:05
i think mine was blasted with ultra fine black powder...

whatever it was is £30 a tub
BenR
05-03-2007, 16:07
so long as the bearing, guides and lifter bores were covered then your fine.
AndyFielder
05-03-2007, 16:10
LOL...mine looks nothing as goos as that on the outside.

Still looks loads better.. there is corrosion, as i said before, that looks like black clouds in certain places on the machined bits... all the casting came clean and most of the carbon came out...its only a 1.4 8v head... im just practicing on it. Will have it rebuilt for the commuter/sterio on wheels!!

Andy
VIPERONE
05-03-2007, 16:16
loldont forget dont touch the head face hehe..
AndyFielder
05-03-2007, 16:50
the whole lot got washed... shouldt have damages it atall tho..
Lee Keefy
05-03-2007, 17:38
here was mine when redone:

http://i4.photobucket.com/albums/y109/gunnergibson/head.jpg

that looks like a skim to me :wink:
VIPERONE
05-03-2007, 21:08
that looks like a skim to me :wink:


:roll: :roll: ..no shit!

it was skimmed when the head was refurbed :wink: :wink: :wink:
Lee Keefy
05-03-2007, 23:30
that looks like a skim to me :wink:


:roll: :roll: ..no s**t!

it was skimmed when the head was refurbed :wink: :wink: :wink:

i meant it had'nt had the bottom blasted :?
nyk
06-03-2007, 11:22
Lee was simply making the point that Gunner's head looks like it has only had a skim, ours in comparison...... That has been fully blasted- hence the valves and chambers are clean.


http://i84.photobucket.com/albums/k17/nykola1812/head-1.jpg