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OTC 6043 Blast-Vac Multipurpose Cleaning Gun

4.5 4.5 out of 5 stars 564 ratings
$72.79 with 42 percent savings
List Price: $124.84

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Purchase options and add-ons

Brand OTC
Item dimensions L x W x H 9 x 8.38 x 2.88 inches
Inlet Connection Type Press
Number of Ports 2
Specification Met (unset)

About this item

  • Perfectly suited for quick and efficient cooling system flushing
  • Simply attach it to a radiator or heater hoses and you’re in business
  • Also usable in washing engines and even shop floors
  • Just two simple connections - one to shop air, the other to a standard water spigot - creates a unique air/water vortex blast for powerful cleaning capabilities
  • The tool can also be used to vacuum by turning the venturi inside the gun in the opposite direction
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Top Brand: OTC

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From the manufacturer

OTC Otawonna Tools Equipment HD Specialty Service Professional Technician Diagnostic
OTC A Proud Heritage Since 1925 Quality Tools and Equipment Professional Service Specialty Tool

Proud Heritage of Manufacturing Quality Tools and Equipment
Steve Cross

Drop Forge Operator of 40 years

“I’M PROUD OF THE OTC BRAND. I’M MAKING A BRAND THAT’S BEEN AROUND A LONG TIME. ANY GUY THAT’S WORKED ON A CAR HAS HEARD OF THE OTC BRAND, AND THEY PROBABLY HAVE USED IT.”

At OTC, we're proud of our heritage and those that have built it with us.

OTC - Proudly Serving Professional Technicians for Almost a Century

What We Like Most About Technicians is Their Work Ethic

Technicians are problem solvers who aren’t afraid of sweat on their brow and grease on their hands. They provide high quality services that demand high quality tools. When they need a reliable tool, they know they can depend on OTC tools to deliver.

Owatonna Tool Company for the long haul — proudly designing and manufacturing American specialty service tools, diagnostics and shop equipment since 1925.

  • Automotive Specialty Tools
  • Heavy Duty Truck Service Tools
  • Heavy Duty Shop Tools
  • Motorcycle Tools
  • Electronic Diagnostic Tools
  • and so much more
OTC Shop Equipment Power Train Lifts Stands Cranes Presses DPF Equipment
OTC Tools Special Service Tools automobiles car truck motorcycle
OTC Professional Diagnostics Encore Scan Tool

Product Description

OTC's No. 6043 Blast-Vac Multipurpose Cleaning Gun is perfectly suited for quick and efficient cooling system flushing. Simply attach it to radiator or heater hoses and you’re in business. Also useful for washing engines and even shop floors. Just two simple connections - one to shop air, the other to a standard water faucet - creates a unique air/water vortex blast for powerful cleaning capabilities. The tool can also be used to vacuum by turning the venturi inside the gun in the opposite direction. Air flow is reversed to create a strong vacuum. Note: While normal water pressure will handle the majority of a cooling system flush situations, short blasts are sometimes needed to loosen some contaminants from within the system. Value is at the core of the OTC tool and equipment portfolio. For a simple repair or the most complex drivability concern, these award-winning tools universally solve problems faster, and at better value, than any other product line available. Whether it’s a specialty tool or unique piece of service equipment, OTC provides top solutions to modern automotive service challenges while increasing technicians’ productivity and shop profits.

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OTC 6043 Blast-Vac Multipurpose Cleaning Gun

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Customer reviews

4.5 out of 5 stars
4.5 out of 5
564 global ratings

Customers say

Customers like the value and quality of the valve. For example, they say it's an excellent tool for flushing and blowing out the coolant. That said, some complain about the durability. They say the inlet connection leaks and the trigger broke.

AI-generated from the text of customer reviews

23 customers mention20 positive3 negative

Customers like the value of the valve. They say it's a great tool for the money, it saves them money by not having to replace plugged heater cores, and it'll be the least expensive solution for flushing a coolant system.

"...Overall was very pleased with the product at the price point...." Read more

"...Overall, it’s worth the price paid to get good results for my project/vehicle." Read more

"This tool saved me a lot of money and time...." Read more

"...Saving you hundreds of dollars." Read more

22 customers mention22 positive0 negative

Customers are satisfied with the quality of the valve. They mention that it is an excellent tool for flushing and blowing out coolant, and a perfect tool for cleaning automotive cooling systems. It is also a great cleaning gun and does a good job of cleaning out heater cores. Customers also find it to be effective and versatile. They say it is great for simplifying coolant flushes or any other liquid.

"Gun in conjunction with air pressure does a great job of cleaning. Just wish the body wasn't made of plastic...." Read more

"...This tool flushed lots of debris from the heater core, engine and the radiator...." Read more

"...Still, it did a great job flushing my cooling system. It's a shame they don't give you the air compressor fitting to connect it to an air hose...." Read more

"Great tool for a professional technician that repairs cars for a living. This is a great tool...." Read more

15 customers mention0 positive15 negative

Customers are dissatisfied with the durability of the valve. They mention that it broke in the first use, the inlet connection leaked, and the trigger broke. The plastic broke on the valve and the tool immediately ripped. Some customers also report that the yellow coupler blew off and the drain plug on Panamera broke off radiator.

"...and buy a different one and avoid the situation I ran into with a broken tool, I completely flushed core, open cooling system, and two weeks to get..." Read more

"...very well for about 15 seconds and then the entire valve system exploded shooting antifreeze, water and garbage all over our tech and the..." Read more

"...It can easily break and I would advise that you purchase a more durable quick disconnect at your local hardware store." Read more

"...time i hooked this up to a suburu heater core...the entire plastic end blew off the gun...maybe I just got a bad one out of the box because other..." Read more

Tool performed as desired
5 Stars
Tool performed as desired
OTC has been a top tier tool brand in my book for years. I hesitated purchasing this particular tool at first because it is made of plastic. However, upon receiving and then putting it to the test, it met all my requirements and performed perfectly.Using this tool is an important step when doing a system flush that is often overlooked. You can be confident any stubborn sediment and scale that wouldn't drain by gravity will be removed.
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Top reviews from the United States

mark gilmour
5.0 out of 5 stars Blast out nasty garbage
Reviewed in the United States on June 28, 2022
Verified Purchase
Well first of all I was on the fence about buying this but turned out to be a good investment. I read many reviews and some said it was not genuine otc. Mine definitely was,came in a sealed box so no complaints there. Also by reading reviews I knew it wasn't coming with a air hose end so I ordered one with it. I'd take half a star off for that if I could. But that being said I got it all hooked up and ready to roll. Was happy with the overall quality of it. Make sure you have the drain open to relieve pressure and let the garbage out. I had tried 3 separate times to drain and used radiator flush (prestone) and it was still coming out filthy. A good blasting and there was all kinds of rust and chunks coming out that the liquid cleaner wasn't going to touch. Still need to do the heater core though. I've read the gun doesn't fit in there but we'll see I guess. Probably depends on the make and model. One other note looking at the pictures I would have guessed the nozzle end to be a flexible rubber that would expand with pressure but its not. Its a hard plastic so you have to really get the nozzle seated in good to seal the water pressure. Overall was very pleased with the product at the price point. Still going to take it to the dealership to have them flush and refill it but that's cause I'm super anal about proper maintenance and correct fluids. But they said it was extra for a deep flush which I really think I would have needed. At 100+ an hour this should get me on the regular price one I'd think. And I keep it for future use.
One person found this helpful
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Case Ingersoll Tractors Northeast
5.0 out of 5 stars Worked great, got heat back now.
Reviewed in the United States on February 17, 2019
Verified Purchase
I have a 4 year old Ram 3500 Cummins Diesel with 160,000 miles. The cab heat stopped being hot, this truck would melt you out in a matter of minutes. But this winter the heat just was luke warm at best. I checked the blend doors, changed a thermostat even though I did not think it was the issue it was cheap enough and 160K was time. We had a recall for the water pump and took it in for a New pump figured cant hurt. The last resort before a complete dash tear down including discharging the AC to get to the heater core so a full day at least and hundreds of dollars or pay $1,500 for the dealer to do it. I bought this after watching a You Tube Video of it. It worked great now we have full heat back and it comes out at 150 plus degrees at 25 outside. Before we were getting around 75 degrees! The plastic Male to Male quick connect that comes with it sucks and leaks so I had a brass Male to Male and a brass quick connect. It is plastic, made well but I can see if you do not use your head it could break. Also you have to watch the PSI and amount of water you use so you do not blow apart the heater core. I ran 50-75 psi air and shot it in surges so you get slugs blasting through multiple times with varying amounts of water and did it from both directions multiple times. I also soaked the core for 30 mins with Thermocure and flushed and soaked in vinegar for 10 mins and flushed. Very happy
7 people found this helpful
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Azza266
5.0 out of 5 stars Great cleaning gun
Reviewed in the United States on March 6, 2024
Verified Purchase
Gun in conjunction with air pressure does a great job of cleaning. Just wish the body wasn't made of plastic. The garden hose connection will not stop leaking. Tried putting new seal in it but still cannot get it tight enough to stop leaking. Afraid to hulk out on it being plastic. Just gets you wet when the gun is not in use.
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Robert W
4.0 out of 5 stars Does the job!
Reviewed in the United States on February 13, 2024
Verified Purchase
I used this to flush heater core of my 2014 Ram 2500 pickup. The combination of air and water removed a lot more crud than I had been able to remove using just garden hose water at 40 psi.
The build quality is not great, but sufficient. The trigger works fine, but valve to control the water volume going into the gun leaks a bit and is hard to turn while water pressure is on.
Overall, it’s worth the price paid to get good results for my project/vehicle.
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Stephen the Ex-Monk
5.0 out of 5 stars Blast it clear
Reviewed in the United States on July 29, 2020
Verified Purchase
I drive a 2000 Jeep XJ Cherokee. Anybody familiar with them will tell you they have cooling issues that if left unchecked will destroy the cylinder head and ultimately the engine. Mine began running hot (gauge lied to me) so corrective measures were in order. The coolant was... well it didn't look like coolant anymore. In fact, I saw a lot of rust colored mush. If this wasn't THE problem, it certainly was A problem. Getting the mush out might happen with chemicals. It might not. I'd planned to back flush my heater core since I lost heat during the winter so I thought this might be my best first course. Along with potentially replacing water pump since that's the only thing that hadn't been replaced a few years earlier.

While searching out the stuff I'd need, I came across this tool. I'd never seen anything like it and for $55 or so, I thought it worth it. Yes, I could likely make something for less money. But I don't have the time to spend seeking the components. So, this is what I bought.

You'll want to get a fitting for your air compressor, and if you don't have a pressure regulator on it, you should get one of them too. I will say I forgot to get a regulator and don't appear to have suffered ill effects, but time will tell.

After connecting it up, the first thing I noticed was I couldn't use the attached water shut off. I didn't mess with trying a pliers on it since my hose had a shut off. I'll fiddle with that aspect later.

That valve is what controls water flow, turn it on and water comes running out at line pressure. Add air and it is obviously a lot more forceful. While the water isn't concentrated to a point like a pressure washer would be, it can serve to do some cleaning.

The trigger controls air flow. You can modulate air pressure if you're careful, it's not just on/off.

The business end has graduated steps increasing in diameter to match most cooling system hose sizes. There are ribs to help keep yoru hose in place under pressure.

After draining the coolant, I removed the thermostat to prevent it from stopping water flow. I'll install a new one later.

I did the job in sections. Starting with the heater, I connected the tool to the heater output. First thing I discovered is you need to insure the hose is fully seated. I also suggest tightening your hose clamps. Otherwise, you may blow the hose off and get a bath.

I ran my hose without any pressure for a bit and then started adding pressure. In bursts and some sustained periods. Once the water ran clear for a while I moved on to the next step.

I disconnected both upper and lower radiator hoses. The location of the lower one really didn't allow for running water from that end so i flushed from the top down by connecting the tool to the upper hose. Lots more brown stuff came out. I kept the cap on the radiator while flushing so the water would all go down.

After it ran clear, I reconnected the lower hose plus the heater hoses and repeated flushing from the upper radiator hose. Again, lots of nasty brown gunk came flowing out. Even without the pressure, this method would help. When flushing in this direction, water is going to come out of the upper coolant neck. On my Jeep, it meant water was going to come shooting out the side. A more prepared me would have had something to control the water coming out. Instead my neighbors got the sight of a geyser shooting out from under my hood.

Once the water ran clear, I placed the tool into the coolant neck and flushed water in the opposite direction to what I had just done. I couldn't really see what came out as easily but it didn't seem discolored.

I used the tool to fill the cooling system with water and put it all back together. I also gave the engine bay a sort of cleaning.

Keeping in mind there's no thermostat in it right now, I fired it up and allowed the engine to come up in temp. Even given our current heat, it took a while to heat up due to the missing thermostat. Took the Jeep for a ride through the countryside to see what it did. In addition to the dash gauge, I am monitoring temps through the OBD port. Extended idling with the AC on produced temps around 210 where before it was pushing 250, air temp is around 90. Cruising, the temps dropped down to 195 or lower. Previously, I was lucky to drop below 230 while cruising.

All in all, so far it's a success. I'll replace the thermostat and put actual coolant in it after I've run it for a while. One thing I'd do differently is use a short length of hose to bypass the heater while flushing the engine. No need to push stuff back into the heater core.
6 people found this helpful
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Brian L Trauger
5.0 out of 5 stars Does the job
Reviewed in the United States on April 7, 2024
Verified Purchase
Cleaned the cooling system like it should.
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Chuck Stephens
5.0 out of 5 stars Excellent product
Reviewed in the United States on January 17, 2024
Verified Purchase
The end of the gun was too big for the hose. Had to get connectors and extra hose to make it work. Once I got that done it was a breeze. Unclogged the heater core on 2014 ram 2500 diesel. Does not come with an air hose adapter so you will need to get one.
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Top reviews from other countries

dramenard
5.0 out of 5 stars Good choice!
Reviewed in Canada on November 1, 2023
Verified Purchase
Very sturdy and handy device. Provides a few good applications for coolant flushing and cleaning lines and radiator. Handy reversible action.
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Dan Diyer
5.0 out of 5 stars Worth it
Reviewed in the United Kingdom on December 17, 2023
Verified Purchase
We bought my wife a 2019 Mitsubishi Mirage first cold weather we discovered it had a 50% blocked heater core with barely any heat on drivers side. Using this for about 2 hours I got the vent temp with in 1c of each other.
I had no issues with build quality make sure everything’s tight and sealed! I’m a mechanic so used this with a workshop compressor at work but a home mechanic will need a good air compressor to use efficiently.
The picture is not the item you receive I got the genuine OTC gun.
In all good tool saves a lot of time and money not replacing heater core.
Would recommend.
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Michael
5.0 out of 5 stars It works
Reviewed in Canada on April 12, 2020
Verified Purchase
I wasn't sure if this would work to reestablish good flow through a heater core in my 2005 civic but it did. The connections to the tool are tight and don't leak and the end result was a working heater core that saved a HUGE job to get to the heater core for replacement (probably would never be attempted). So, I recommend this tool. You will need an air fitting as it doesn't come with one. I would have liked a better box to store it as once you add the air fitting it doesn't fit with the box closing but this is a minor inconvenience. The tool helped to restore heat with full flow. Bottom line is that it worked.
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kevin
5.0 out of 5 stars Works great
Reviewed in Canada on September 29, 2022
Verified Purchase
Well worth it.
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Electricalguy 2020
4.0 out of 5 stars Works well to flush system
Reviewed in Canada on November 8, 2021
Verified Purchase
Easy to use to flush cooling system
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