Autool HTS558 Walnut Blaster, 1200W Engine Intake Valve Carbon Cleaner, 13L Capacity with Extension Nozzle & Built-in Filter

excellent machine, easy to use, works great.

It arrived on time and well packaged. Worked exactly as designed and performed admirably. Well worth the money spent for this machine. It literally pays for itself in the first use.

Worked very good for cleaning carbon off intake valves. Would buy again. Comes with 2 bags on walnut shells.

Works really well, no issue setting up. Really easy to use and efficient for valve decarburizing.

Excellent for cleaning carbon off intake valves

Very nice tool, well built and worked very well. The vacuum is very powerful.

Very fast shipping, complete package including everything you need for the first job. Did exactly what it was supposed to do, happy with the result too.

this vacuum cleaner works perfect and very affective, only drawback is that it came to me with small damage in the hose holder and the clips has broken, but the seller offered me another one immediately!

The instructions are rather sparse and in broken English, but that's not surprising given the country of origin. Not mentioned in the description is that it does include two bags of media, which was a nice surprise. I bought this rather than piecing together a media blaster and shop vac. It's convenient in that the hopper chamber is below a sieve in the recovery tank, so it basically pulls the spent/reusable media back into the hopper, allowing more continuous operation without having to stop to reload. You do sometimes have to give the unit a shake to settle the recovered media through the sieve. The "filter" touted in the description is above the return, rather than between it and the hopper/sieve, and it's basically the air filter that protects the motor like any other shop vac. It does absolutely nothing for separating the carbon and recovered media (I had been trying to figure out how it could before purchasing). This allows some of the carbon removed to become part of your media, but I also found very large chunks that couldn't go through the sieve to the hopper chamber, so no big deal. I've only used it on one engine so far, but it worked very well for cleaning. It took a bit to figure out how to tell where I was aiming with the suction attachment in place, but once you do, it goes quickly. I'd recommend keeping an eye on the feeder tube, as it relies on Venturi suction from the nozzle to suck it out of the hopper. There were a couple of passes that had little to no effect because the port in the hopper had become uncovered (this is where shaking the unit from time to time to settle the media in the unit is important). Bear in mind that once completed, you may still be able to see some buildup on the backside of the valve/stem due to not being able to blast it from the necessary angle (kind of like a shadow area), but it easily removed over 90% of the buildup. The things I might like to change to improve its functionality would be: 1) Adding a shut off for the media line so that you can use just the air nozzle to stir up the media and vacuum it out when you're done with that port. There's a shut off line for the air already to help reduce accidental discharge. 2) Include a curved nozzle/wand to help get deeper into certain engines. The one I was working on (GM 3.6) has very deep intake ports through the head that take a slight turn. The straight wand made it difficult to get to the valves. My only other suggestion would be to get one of the custom-made-to-the-engine vacuum attachments if you're going to be doing very many. I managed to seal it off well enough with the included attachments, but it was more work. Attached are before and after pics of the same port.

The scope of delivery is great. Everything you need to work with the device is included. Unfortunately, the built-in compressed air connection is not compatible with our German compressed air connections. After a long and... Read more