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Your cart is empty.OTC's Cooling System Pressure Tester allows you to pressure test the cooling system on most cars, light trucks and SUVs. Also works on motorcycle, ATV, snowmobile, and many marine applications. The tester's universal fit design eliminates the need for multiple adapters. Note: will not work on Saturns, Kias or Jeeps with a plastic coolant reservoir. Durable blow-molded storage case keeps tools contained and organized so they are ready when you need them. 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.
CHRISTIAN GARIEPY
Reviewed in Canada on January 25, 2024
Tester des fuites dw prestone
Mario
Reviewed in Canada on September 5, 2018
Très bonne outils.
Rob D.
Reviewed in Canada on June 7, 2018
Works well, however the one drawback is their is no way to test rad cap.
C. Dalton
Reviewed in the United States on February 24, 2017
Do not waste your money on this piece of junk! The inflatable bladder does not work properly and is poorly designed. It is NOT a universal fit item. Came with no instructions and customer service from OTC is a joke. The $90 set from Harbor Freight is 10 times better!
Mr. S. Hewitt
Reviewed in the United Kingdom on May 24, 2016
does what it says very good value
loyal buyer
Reviewed in the United States on October 21, 2015
First it is complicated to use, took me about 10 test to get the idea how it supposed to work, and the bladder is no longer inflatable rendered it useless, the the return no longer valid. Just ordered another kind of 27 pcs tester which is like plug and go. not recommended for others.
Scott Smay
Reviewed in the United States on September 20, 2014
good quality and worked as expected. Took some trying to get the universal sealing to work but worked great after I figured it out, the universal fit is nice as you don't need a bunch of adapters.
Abdullah Y. Farhan
Reviewed in the United States on April 30, 2014
i am a DIY kind of person, i got this as i usually have problems with my cars cooling system, this was able to help me pinpoint problems in my cooling system and find leaks quicklya good investment which is accurate and better than being ripped at a garage
David Painter
Reviewed in the United States on September 15, 2013
Love the fact that this tester fits a majority of cars without having a bunch of adaptors. I was not too sure how it would work when I first got it because the universal adaptor looked pretty flimsy to me but regardless of how it looks it works well.
TSG
Reviewed in the United States on July 29, 2013
While there's no argument OTC doesn't make the best tools in the world, they make very good tools at very reasonable prices. The 7991 is no different - it brings professional-level capabilities at a DIY price. I'm happy to have added this cooling system pressure tester to my shelf full of save-my-bacon OTC equipment. ;) The singular best feature about this tool is the air bladder that seals the pump against the cooling system's filler neck. Even though getting the bladder to exactly the right height is a small pain, it's far less annoying than keeping track of and sorting through a stack of filler neck adapters. There is also significant peace of mind knowing that this tool will very likely work on virtually every car to come out down the road, rather than fretting that you'll need to buy more adapters when someone changes a thread or diameter. (In my particular case, I've already got an oddball car that has a unique filler neck - so the OTC tool was the obvious choice!) Operation is pretty straightforward - adjust the depth of the bladder, adjust the height of the clamp, slide the pump valve to "Bladder" and inflate until the indicated location on the gauge - just a few pumps. Slide the valve back over, and pump up your cooling system to the appropriate pressure (15-20lbs, usually). Look for leaks or listen for hissing - and of course be aware that if you've got a couple problems, fixing one may cause another to show up, so keep retesting until pressure is held. My sole complaint about this tool is the slider valve. Quite honestly, it sucks. If you don't have a quick hand you can lose bladder pressure when moving between "bladder" and "system" and that can lead to a spray of coolant. Also, the slider is so easy to move a fly landing on it might be enough - just the slightest nudge results in the same coolant spray. In order to use the pump effectively I had to steady one hand against the body of the car - a slight tug on the hose moves the slider and then you start over (and make a mess). In the same vein, depressurizing the system is an art form - you need to gently move the slider right into the middle to release pressure. Too little or too much can result in nothing happening or - you guessed it - a mess. The slider is a minor nit - I'm more than willing to live with this idiosyncrasy given the functionality, flexibility, and price of the tool. It's a thoughtful design that just needs some tweaking. Regardless, I found my leaks in a few minutes and I saved myself hundreds of dollars at a shop. For my application it wasn't necessary, but if you've got tough to find leaks I'd probably recommend picking up some cooling system dye and a UV light to compliment this tool. It's cheap, and might save real time.
Igggy
Reviewed in the United States on March 10, 2013
I have one of this tools before just like this one but a diferent brand and it did work good for long time, sso i dicide to buy this one than looks the same, with the diferent than doesn't work that well the valve to close an hold the presure leaks.
Dominic Perez
Reviewed in the United States on April 20, 2013
I wish I would have gotten one years ago it took me 5 minutes to find a tiny leak I wouldn't have found without it. I've only used it on a ford van with a fairly traditional radiator cap, I didn't need to use either of the included adapter so I can't really comment on the universal fit aspect.It seems well made but I worry that the rubber bladder that makes the seal will degrade over time.
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