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Hromee Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool with M12 or M14 Thread for GM Chevy LS1 LS3 LS6

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$12.99

$ 5 .99 $5.99

In Stock
  • Pressurizes the cylinder to help hold valves closed with compressed air. So The oil seal of the valve can be replaced without dismantling.
  • When the cylinder is in the compression stroke. If the air tightness of the engine is not good enough, you can hear the continuous leakage of air. Diagnosis of damaged parts by listening to the leak position.
  • Used for the gasonline engine cylinder with M14 or M12 spark plug, have to move out spark plug before install this tool. It can be used for gasoline engines, such as cars, trucks, boats, motorcycles, ATVs, etc. Not to be used in diesel engine vehicles.
  • Adopt with durable rubber tube and brass fitting connectors, anti wear, high pressure resistance, anti corrosion and abrasion. Air pressure avoid the valve to falling into the combustion chamber.
  • 300Psi/20Bar pressure tube with M12 and M14 thread to NPT, install the joint on the position of the spark plug. There have a 1/4" NPT air compressor air pump quick coupler male plug for easy work. Note the working pressure range 30psi≤P≤110psi(2bar≤P≤8bar).



Product Description

VALVE
INLET VALVE
LENGTH

Jamiee
2025-08-28 16:42:26
Worked as expected. Served its purpose well. Used to pressurize cylinders of an GM LS 5.3lt engine to assist the valve stem seals replacement.For anyone using it to pressurize cylinders, I'd suggest finding a shorter hose.
Roger
2025-08-04 17:12:32
Worked great. Adjusted pressure to 80psi and went to work. Installed TSP springs and guide seals.
ForestvilLee
2025-06-28 11:53:56
I used this on a 2004 Chevy Suburban with the 5.8L engine. Two things, don't waste a hours trying to screw it in until you figure out that the O-ring between the large and small spark plug threads needs to be removed or you can't screw it into the spark plug. Second, make sure the piston is at TDC or the valve may still drop while using this device. I got real lucky it didn't fall all the way into the cylinder.
dd9704
2025-06-26 12:22:15
I bought this to replace the valve stem seals in my Kawasaki tractor engine. I ended up temporarily removing the o-ring of the smaller threads to get the larger threads started for my application. Worked just fine. Same price as the Lisle tool, but comes with an air chuck adapter already installed AND an air valve for added convenience. A very handy tool to have in your collection!
Jamiee
2025-06-25 14:05:21
Worked as expected. Served its purpose well. Used to pressurize cylinders of an GM LS 5.3lt engine to assist the valve stem seals replacement.For anyone using it to pressurize cylinders, I'd suggest finding a shorter hose.
Roger
2025-05-18 19:28:00
Worked great. Adjusted pressure to 80psi and went to work. Installed TSP springs and guide seals.
ForestvilLee
2025-04-16 14:12:23
I used this on a 2004 Chevy Suburban with the 5.8L engine. Two things, don't waste a hours trying to screw it in until you figure out that the O-ring between the large and small spark plug threads needs to be removed or you can't screw it into the spark plug. Second, make sure the piston is at TDC or the valve may still drop while using this device. I got real lucky it didn't fall all the way into the cylinder.
dd9704
2025-04-02 15:32:00
I bought this to replace the valve stem seals in my Kawasaki tractor engine. I ended up temporarily removing the o-ring of the smaller threads to get the larger threads started for my application. Worked just fine. Same price as the Lisle tool, but comes with an air chuck adapter already installed AND an air valve for added convenience. A very handy tool to have in your collection!
dewayne whitney
2025-03-19 16:44:14
It worked great after I took off the first oring. Had to replace my valve seals and I was happy to get it done In no time with this tool. Nice long hose to reach even to cylinder 8 which is behind the evap can.
Daniel J
2025-03-17 18:30:47
The part that screws into the spark plug hole does not swivel freely. You have to try to catch the threadss while rotating the entire hose. Its nearly impossible.
The Seller
2025-02-21 12:05:00
Do the job
Michael
2025-01-15 15:04:25
No air leaks
dewayne whitney
2025-01-06 11:25:09
It worked great after I took off the first oring. Had to replace my valve seals and I was happy to get it done In no time with this tool. Nice long hose to reach even to cylinder 8 which is behind the evap can.
Daniel J
2024-12-20 13:20:25
The part that screws into the spark plug hole does not swivel freely. You have to try to catch the threadss while rotating the entire hose. Its nearly impossible.
The Seller
2024-12-04 10:22:28
Do the job
Michael
2024-11-27 12:46:36
No air leaks
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