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.

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.

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.

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

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Engine Air Valve Holder(Heavy Duty Hose 1000PSI) Fit M12 or M14 Thread

Engine Air Valve Holder(Heavy Duty Hose 1000PSI) Fit M12 or M14 Thread

Product ID: 97870816

Details

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

🌀Steel wire braided hose for durability

🔧1000 PSI heavy-duty pressure

🛠️Fits M12 & M14 spark plug threads

€ 39.31

Duties & taxes included

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Sold byAmazon ItalyDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔩 Lock in precision, unlock engine potential!

LEAK DETECTION MADE EASY - Diagnose engine air tightness by pinpointing valve leaks during compression stroke—hear the difference, fix with confidence.
QUICK CONNECT CONVENIENCE - 1/4" quick coupler male plug enables fast, hassle-free setup so you can get to work without delay.
PRECISION VALVE PRESSURIZATION - Hold valves securely closed with up to 1000 PSI compressed air for seamless oil seal replacement without engine teardown.
RUGGED BUILD FOR HEAVY DUTY USE - Upgraded 2024 materials with steel wire braided hose deliver unmatched durability and resistance to high pressure and wear.
UNIVERSAL SPARK PLUG COMPATIBILITY - Designed to fit M12 and M14 spark plug threads, ensuring broad compatibility across gasoline engines from motorbikes to trucks.

The kweiny Engine Air Valve Holder is a heavy-duty diagnostic and maintenance tool engineered for gasoline engines with M12 or M14 spark plug threads. Featuring a robust steel wire braided hose rated for up to 1000 PSI, it pressurizes cylinders to hold valves closed, enabling oil seal replacement without dismantling. It also aids in detecting air leaks during compression strokes, streamlining engine diagnostics. Built with upgraded 2024 materials and a quick coupler for easy use, this tool is essential for professional-grade engine valve maintenance.

Specifications

ASIN	B07FYCSKJV
Automotive Fit Type	Vehicle Specific Fit
Best Sellers Rank	#273,085 in Automotive ( See Top 100 in Automotive ) #160 in Engine Valve Train Tools
Brand Name	kweiny
Compatible with Vehicle Type	ATV, Motorbike, Passenger Car, Truck
Customer Reviews	4.2 4.2 out of 5 stars (474)
Fit Type	Vehicle Specific Fit
Item Diameter	14 Millimeters
Item Weight	5.5 Ounces
Manufacturer	Xingzhu
Manufacturer Part Number	XZAMR000
Material Type	Brass, Rubber
Model Number	5824091470
Number of Pieces	1
UPC	781573032666

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