CLEANING THE CASE AND HEADS

post questions about your car

CLEANING THE CASE AND HEADS

Postby derbug » Sat Nov 23, 2013 10:02 am

I find the most difficult task in rebuilding a
VW engine, is cleaning the case and the heads....
what a pain....one will spend a few hours...removing
all of the baked on dirt, grease and carbon....
I did a search on The Samba .... on this.... many
different approaches ..... one they used was glass
beading the case.... WHICH I WOULD NEVER RECOMMEND !
one can get away with glass beading the heads and getting them
clean of the media....but the case....A NO NO in my book.

Here is my approach to this task:
Engine Case
1. Carefully scrape off the big stuff, with a very flexible
1" or a little bigger putty knife and a small screwdriver
for the small areas....do this before you soak the case
with the engine degreaser.....I do this over a big box
to catch all of the "big stuff"
2. Now the degreaser, spray on, let it set a while....then with
a wire brush, and regular bristle parts cleaning brush....
brush away...."I am really having fun now"
3. Take to a car wash, and spray/clean, or if you have a power
washer, you know what to do.....it will try and get you....when
it blows back on you in the tight spots, but that is part of the fun
4. Blow dry with air.....and see what you missed, and repeat 2 and 3
5. Some use "Wheel Mag Bright" which is caustic, read the directions
on the product, but sort of turns the case dark....Only use on the outside
if you try this.....but remember to rinse off really good and read the directions
6. The Ideal would be to find a 55 gallon drum of carburetor cleaner and immerse
the case after one got it as clean as they could by the "elbow grease method"
or an engine hot chemical or head vat....like the head shops use.....I think they
degrease them, steam clean and then do the vat soak last
7. Of course remove the Oil Relief valves and some will(this is up to you)
drill out the factory oil passage plugs and tap for the threaded replacement plugs.
There is oil passage cleaning brushes, similar to gun cleaning bore brushes one can
buy at Harbor Freight for this task if you so choose.

I have built many VW engines, when I had my repair shop, and never did the drill out plugs
and tap method.....just ran cleaner/solvent through all of the passages, let the case soak....ran
the cleaner/solvent through them again, had a safety clean machine, with their solvent ....
then water.....and lots of air....never had a come back problem.

Any input or suggestions: your method, please add.....always open to new methods/ideas
User avatar
derbug
 
Posts: 167
Joined: Mon Nov 11, 2013 9:59 pm
Location: NW OKC HEFNER & N. ROCKWELL

Re: CLEANING THE CASE AND HEADS

Postby derbug » Sat Nov 23, 2013 10:28 am

THE HEADS:
after removing the valves, springs, and so forth.....a bare head

1. The combustion chamber, carefully scrape out the carbon with'
the flexible putty knife....only can do this on the flat part of
the chamber.....then one can use a round wire brush on a drill
or air drill to clean around the valve port areas....this gets all
of the hardened dry carbon which is brittle....you may want to
wear a mask for this....for this stuff does get in the air as you
are cleaning
2. Conventional spray oven cleaner: the spray oven cleaner the cheaper brand
the better.....the secret is warming the heads prior to spraying
on the cleaner(I use a regular hair dryer).....work good on grease for home ovens....
so why not VW heads.....just read the directions on the product....this also works
good to clean the engine tin, but will remove the black factory paint
some what.....just remember to wash with soap and rinse with water....
the power washer works good for this....
3. Anyway, get them as clean as you can.....and dry.....then one can glass bead
them.....and then back to the soap, water, and lots of air
4. One can use the cleaning degreaser/solvent method as best they can
then the over cleaner...then the glass bead media
5. When you do the combustion chamber, look for cracks in that area, especially
between the spark plug hole and the valve seats....if cracked in that area....do not
waste your time.....also inspect the spark plug threads, and if stripped, that can be repaired
most of the time....
6. assuming that you have done all of the above, and have worthy heads, that are rebuild-able
then you do the valve job on them, and or take them to a shop and have the valve job
performed by a head expert....
7. I guess if you take to a head shop....you can just give them the dirty ol heads and
let them do all of the machine and grunt work

I still do all of my head machine work, have all my tools to cut/surface the seats, can replace
the valve guides, ream, and so forth.....I do not fly cut the heads at this time but can do the rest.
One can machine the intake valves, but the exhaust should always be replaced, for they are the
ones prone to failure.

again if anyone has anything to add to this.....always open to new ideas or approach...for we are
always learning
User avatar
derbug
 
Posts: 167
Joined: Mon Nov 11, 2013 9:59 pm
Location: NW OKC HEFNER & N. ROCKWELL

Re: CLEANING THE CASE AND HEADS

Postby vwlimoguy » Sat Nov 23, 2013 10:45 pm

I soak my case in Purple Power degreaser. Its pretty cheap and cuts through the grease decently. It will darken the case and eat the skin off your hands.
User avatar
vwlimoguy
 
Posts: 297
Joined: Wed Nov 04, 2009 1:38 pm
Location: OKC
Highscores: 5

Re: CLEANING THE CASE AND HEADS

Postby vdubjim » Sun Nov 24, 2013 9:39 am

Or use a parts washer and solvent with stiff nylon brush.
User avatar
vdubjim
Site Admin
 
Posts: 2019
Joined: Fri Aug 28, 2009 10:21 am

Re: CLEANING THE CASE AND HEADS

Postby derbug » Sun Nov 24, 2013 11:34 am

Parts washer with clean solvent, work good, if one has access to one....
When I had my shop, Safety-Kleen Provided me with a washer and solvent....
for using their solvent.....solvent did not say clean very long when cleaning
VW cases. They would come in and change out the solvent on a 2-3 week basis ....

The Purple Power Degreaser, I searched....they sell at Walmart.....
and only about $5.00 per gallon...
I will have to try
I have used 409 cleaner degreaser, but does not take the skin off
the hands....sounds like the Purple Power much stronger
User avatar
derbug
 
Posts: 167
Joined: Mon Nov 11, 2013 9:59 pm
Location: NW OKC HEFNER & N. ROCKWELL

Re: CLEANING THE CASE AND HEADS

Postby vdubjim » Sun Nov 24, 2013 12:05 pm

Pressure washer at car wash is nice too, mess up someone's place and not yours. The one by me, water is heated too.
User avatar
vdubjim
Site Admin
 
Posts: 2019
Joined: Fri Aug 28, 2009 10:21 am


Return to Tech Help

cron
Hosted by Freeforum.ca, get your free forum now! TOS | Support Forums | Report a violation
buying traffic website
MultiForums powered by echoPHP phpBB MultiForums