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Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool(Heavy Duty Hose 1000PSI) Fit with M12 or M14 Thread

Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool(Heavy Duty Hose 1000PSI) Fit with M12 or M14 Thread

Q: Does this work on a early Chevy 5.3?

I used it on a 1966 283 Chevy engine. I found it easy to use and very effective. You will need a small wrench to tighten the tool into the spark plug opening. I ran about 40 PSI on the unit and left my air compressor running as needed.

Q: Will this work on a small block Chevy 350 ?

YES! It will work on Chevy 350, 305, any small block. The two thread sizes it comes with fits most cars.

Q: I used it, the high pressure tube blew out at 60psi on the very first use, the return window is closed, will you take it back?

If you're changing valve seals you only need 35 to 40 PSI.

Q: Do you make a solid tube for when the spark plug is recessed several inches? Where a flexible valve holder cannot be tightened.

My spark plug is recessed about an inch if that and I used an old 3/8 wrench and bent the end so that I could get in to the recessed area and tighten the fitting. You do not have to make it very tight to get a seal. If your plug is recessed several inches, then I think the only option you would have would to be make up a tube that would slide over the air hose on the kweiny and use that to tighten the fitting. Good luck, Jim

Product ID: 97870816

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Details

Material
Brass Rubber
Brand
kweiny
Fit Type
Vehicle Fit
Vehicle Service Type
ATV Motorbike
Number of Pieces
1

🔧1000 PSI heavy-duty pressure

🧵Steel wire braided hose durability

🛠️Fits M12 & M14 spark plug threads

Description

🚗 Seal it tight, diagnose right — the pro’s choice for engine care!

BUILT FOR HIGH PRESSURE - Upgraded 2024 steel wire braided hose withstands up to 1000 PSI for heavy-duty performance.
PRECISION VALVE SEALING - Pressurizes cylinders to hold valves closed, enabling valve oil seal replacement without dismantling.
QUICK CONNECT CONVENIENCE - 1/4" quick coupler male plug ensures fast, secure compressed air connection.
LEAKAGE DETECTION MADE EASY - Diagnose engine air leaks by listening for continuous air escape during compression stroke.
UNIVERSAL SPARK PLUG COMPATIBILITY - Designed to fit gasoline engines with M12 or M14 spark plug threads for versatile use.

The Engine Air Valve Holder and Cylinder Leakage Testing Assistant Tool is a heavy-duty diagnostic device designed for gasoline engines with M12 or M14 spark plug threads. It pressurizes cylinders up to 1000 PSI using a durable steel wire braided hose, allowing valve oil seal replacement without dismantling and enabling precise detection of air leaks during compression. Equipped with a 1/4" quick coupler for easy air connection, this tool is essential for professional-grade engine maintenance and repair.

Specifications

Material	Brass, Rubber
Brand	kweiny
Fit Type	Vehicle Specific Fit
Vehicle Service Type	ATV, Motorbike, Passenger Car, Truck
Number of Pieces	1
Automotive Fit Type	Vehicle Specific Fit
Manufacturer	Xingzhu
UPC	781573032666
Item Weight	5.5 ounces
Product Dimensions	12 x 0.7 x 0.7 inches
Item model number	5824091470
Is Discontinued By Manufacturer	No
Manufacturer Part Number	XZAMR000
OEM Part Number	M12 and M14

Have a Question? See What Others Asked

Does this work on a early Chevy 5.3?

Will this work on a small block Chevy 350 ?

I used it, the high pressure tube blew out at 60psi on the very first use, the return window is closed, will you take it back?

Do you make a solid tube for when the spark plug is recessed several inches? Where a flexible valve holder cannot be tightened.

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