Orion Motor Tech Coolant Pressure Tester Kit, 33pc Master Coolant Vacuum Refill Kit with 23 Radiator Adapters, Radiator Cooling System Pressure Tester Kit with Vacuum Pump Vacuum Purge & Refill Tool

This dual-purpose OMT kit for both Pressure Test AND Vacuum Test+Fill offers incredible value, with custom-fit adapters for nearly every radiator and cap type—nearly matching AutoZone's $370 single-purpose rental kit which only performs Pressure Tests. After using it for 6 months on multiple cars of different brands (and connection types) from USA to Japan and Korea, I’m extremely satisfied. The kit helped me quickly identify a large radiator leak by producing a visible spray of coolant as a result of pump pressure on the closed cooling system, something I couldn't achieve just by idling the engine. (Important note: Don’t over-pressurize beyond your radiator cap’s rating to avoid creating new leaks.) The included hand pump is great for pressure testing radiators and caps, reaching up to 40 psi (2.5 bar) on its high-quality gauge. That's higher than the pressure rating of any radiator cap I've ever yet seen, so it covers the maximum possible pressure I'll ever test to. In addition to immediately detecting obvious large leaks, the pressure gauge can be used for sustained "hold tests" to find small leaks that may only drip over time. If necessary, you can use UV dye in the coolant, then apply pressure to reveal even the smallest leaks with help from a UV Light at night. I’ve found that combation of Pressure Pump PLUS UV helpful for diagnosing slow leaks that may cause coolant loss over months, tool, but still eventually risking overheating and blown head gasket if not found and repaired. A standout feature of this OMT kit is its included vacuum test and fill tool, which is usually an extra cost for a separate kit from other brands. This tool uses induced vacuum from an air compressor to remove all air gaps during coolant refills, preventing problems like cylinder head cracks or heater failure which may occur after any less perfect fill with air gaps. OMT includes this vacuum tool with the pressure tester at the cost of just this one combo kit. That's unlike competitors such as Harbor Freight, which charges $95 for a single-purpose pressure test kit, then an additional $88 for their completely separate tool for vacuum test and fill. The vacuum tool in this OMT kit is also well-designed, working effectively with all 22 of the kit's shared custom-fit snap-on radiator adapters which also snap onto the pressure test tool to assure a secure seal. It created a solid vacuum of 25 inches (0.85 bar) for me today when blowing my 90 psi compressed air through its vacuum ejector. Then I only had to close a quarter-turn ball valve to lock in that strong induced vacuum and confirm no leaks anywhere in my car’s entire coolant loop after that vacuum held throughout a 10-minute test. Finally, by opening one ball valve to its coolant intake [after previously draining old coolant and then vacuum hold testing as I'd just finished in the close-up photo], I was extremely pleased to [finally; after 40 adult years of growing expertise as home mechanic to family & friends] refill exactly like the best-equipped pro repair shops [see wider photo, just as I finished my setup to fill from its induced deep vacuum [in my pre-drained empty Cooling System] to Zero Remaining Vacuum [which then means 100% filled with no air bubbles; equalized with the atmospheric pressure which is pushing down outside - on the remaining new coolant in my siphon bucket]. This Vacuum Test+Fill tool has just added a professional level tool to my home garage - saving time and more importantly, perhaps saving engines from overheating failures due to coolant leaks I wouldn't have found without it. Overall, this OMT kit offers the most quality and value I could find for under $100 (as I write this, in Spring 2025). It has brought me professional-level capabilities for testing and repairing cooling systems on a variety of cars—eliminating many times its cost in shop labor for cars of family and friends while ensuring reliable, leak-free repairs.

This comes with a nice case, good quality hand pump pressure tester, and shop air purge and refill device. Fits all my BMWs and Toyota cars. Lots of expansion tank adapters that fit perfectly. Tool works with no air leaks and does the job right the first time. So much better priced that the BMW recommended tools, and overall nice quality parts.

I used this Orion Motor Tech coolant pressure tester on a cooling system diagnosis and it worked exactly how I needed. It seals to the radiator neck and lets you pressurize the system so you can check for leaks without guessing at what’s going on. The gauge is clear and easy to read, and the build feels solid enough for occasional garage use. I was able to confirm a leaking hose vs the radiator with confidence, which saved time and guesswork during the repair. It’s not a fancy lab‑grade tool, but for home mechanic work it’s reliable and effective.

This unit served it's purpose, and executed a number of refills on the high-temp and low-temp circuits of my B58 powered BMW. There was an adapter that worked perfectly for both expansion tanks. The unit draws a vacuum well, however function is not perfect: - Issue 1 - There is a small o-ring in the vacuum tool that pops out easily around and above 90 PSI. While 90 PSI sounds like a lot, it is the incoming pressure required to obtain a system vacuum pressure of -20 PSI. it easily pops back in, but is disruptive and feels like a simple fitment refinement. I may try to stuff a slightly thicker o-ring in there to solve the problem. - Issue 2 - the pickup line is too stiff, which together with the coiled shape retained from packaging makes accessing fluid at the bottom of your container ineffective if you aren't holding the line where it is needed. For context, I drew distilled water from 5 gallon bucket, and coolant from 1 gallon containers. Either a more flexible suction line held in place by the heavy end fitting provided, or fixed / stiff straight suction line would make this easier to use. This I will address prior to the next use.

Had to replace a rotted out radiator. Used it to refil and pressure test. Helped to find small leaks from hoses until I got everything tight. Might not use it often, but now I can test myself or help others.

Exceeded my expectations! This kit is well thought out and seems to be of very good quality. It was a bunch of adaptors one of which fits my Audi Q5. There's even additional adaptors for your Air Compressor to fit on the vacum setup (the included pump is only for pressure testing). I've been wanting a kit like this for years and this one is awesome! If you are replacing the fluid on a newer (even older) vehicle pulling a vacum beforehand is a must - this will help eliminate an air bubble being trapped which can blow a head gasket or due other engine damage. My S2000 had one years ago and it didn't show up until I put about 50 miles on it after the fluid change - the Water Temp gauge pegged at max in just a few seconds. I was lucky and had extra water to help fill the air bubble void and everything ran fine afterward. If you get this OMT kit you won't be disappointed! Awesome value for everything you get.

Absolutely terrible quality tool, like others have stated the air fitting popped right out of the plastic threads in the vacuum filler when hooked to air. Also the quick connect couplers leak so you will never be able to properly pressurize or pull vacuum on a system, the gauge will always drop making you think you have a leak. I hooked a different cooling system pressure tester up to the same cooling system and it held steady…Don’t waste your money. I have purchased other tools from OMT in the past and they weren’t bad but this one is.

Great product for pressure testing cooling systems.

Preis Leistung Top. Schon mehrfach verwendet, funktioniert wie erwartet und wirkt qualitativ besser verarbeitet als manch andere Namhafte Hersteller.

Brilliant bit of kit does what it says on the tin

Really great tool, well made, fittings great quality and tough, use this tool at work as well at home, important correct fittings used on the expansion tanks, can be tightened with the small spanner supplied, overall great value for money.

Comprehensive kit. Has a few sizes that I struggled to fine in others.