How to walnut blast?

[Spike00513]

How is everyone carbon cleaning?

Seems like the best method is via walnut blast with maybe a metal adapter from 034
Are you using the Harbor Freight kit?



kit: $35
adapter: $50
walnut fine media: $25 per 25lb bag

I wonder how long one bag lasts and how many cars it can do

Also, if you decide to blast other things as a side project, such as cleaning up a metal part
how does that work?

I am more worried about getting the work area sandy and polluting the environment
It's one thing to use a blast cabinet (which I don't have)
but switching over to glass bead (if it's needed?) and then spraying that stuff all over the area and outside seems kind of sketchy
like what if a random animal walks by and licks it up off the ground

IDK if Harbor Freight is the cheapest place to obtain walnut media





looks like BMW even has a factory adapter, part number 81 29 2 208 037
Not sure if it works on other vehicles
Hopefully whatever tool is used has a good seal to the cylinder head and with the hole the spraygun goes into, so that media doesn't get all over the place in the engine bay



at slightly lower price, people also sell plastic ones, but IDK how many uses they last up to

[Der Konig]

I tried the harbor freight kit and its garbage, dont waste your money. I think people have good luck with the soda blaster.

[rfelker]

someone has a template to make your own adaptor on the site somewhere. if you soda blast make sure you cover the area with a sheet. And dont buy the 20 dollar gun from harbor frieght doesnt hold enough to do crap. Also a pancake compressor isnt going to work need a larger one. Ive walnut blasted under my jeep and works great for rust. I dont think I would use it on valves. Sode blasting is your best bet. Just warning you makes a huge mess.

[Theiceman]

use dry air ...

[oVeRdOsE]

I tried the harbor freight kit and its garbage, dont waste your money. I think people have good luck with the soda blaster.

this.

I took a cheap sand blast gun from local store, open my fridge and take the soda box and a shopvac to catch the dust.

cheap, and working. A bit messy, but it will dilute and wash away with water.

[megarex]

walnut blasting is really effective when the tools are correct. If you have access to a high CFM <20gal air compressor then go for it

Here is a good BMW DIY with that HF kit for help:
https://docs.google.com/file/d/0B3Ta...BoTTM5aEE/edit

he also sells a 3d printed vacuum attachment for vw/audi instead of the 034:
http://www.bimmerhelp.info/Buy_Blasting_Tools.html

iI would get a thin sheet of urethane or foam to make a gasket and glue it to the 034 adapter for better suction.

[boostin20v]

I used the small Harbor Freight gravity feed gun and the coarse walnuts when doing my VR6 motor. The block was on an engine stand which made it easy to roll outside and not worry too much about clean up. I used a metal toilet hook up pipe threaded on the end to extend and an old inner tie rod boot connect similar to the 034 adapter.

Depending on how good your process is with the shop vac, a box should do at least two cars. For when I will do my 2.0t I bought the RKX head adapter (https://smile.amazon.com/gp/product/B07T81SGT7/) figuring having a stiffer base for the connections would be better then the boot I used.