When diagnosing engine sealing issues, guessing costs time and money.
VAC Engine Leak Down Test Plate was developed for engine builders and machinists who want accurate piston ring sealing data after cylinder head removal. Instead of trying to determine whether leakage is coming from valves, rings, or head sealing issues, this tool isolates the pistons and rings directly at the block for precise leak down testing.
Designed and used in-house by VAC Motorsports, this billet aluminum fixture mounts directly to the engine block using the head gasket surface. Once installed, simply connect your standard leak down tester and pressurize the cylinder to evaluate ring seal and cylinder integrity.
This design allows testing of two cylinders at once for faster workflow and more consistent readings during engine teardown, inspection, and blueprinting.
Whether you are evaluating a tired street engine, diagnosing blow-by issues, or verifying a fresh performance build before final assembly, this tool gives engine builders reliable, repeatable data.
If we use a tool in our shop, we sell the tool.
Features
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Precision-machined billet aluminum construction
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Direct block-mounted leak down testing
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Isolates piston and piston ring sealing only
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Eliminates valve leakage variables during testing
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Tests two cylinders simultaneously
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Works with standard leak down testers
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Designed for professional engine builders and machinists
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Ideal for engine teardown inspection and race engine diagnostics
Fitment
Fits BMW Engines:
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BMW M10
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BMW S14
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BMW M30
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BMW S38
Specifications
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Maximum Bore Size: Up to 96mm
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