Head to head

Tool Aid 34000 vs OTC Deluxe Compression Tester Kit

Our pick

OTC Deluxe Compression Tester Kit

Compression Test Kits

Why this one

The included adapters and deep-well connector give you options for connecting to different spark-plug openings on gasoline engines.¹²

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Product photographs. Not to scale.

What Tool Aid 34000 offers

Choose the Tool Aid 34000 for gasoline-engine applications using its 14 or 18 mm connections. Its side release valve allows another check without removing the adapter; confirm the specified plug opening and application first.³

What differs

Specification	Tool Aid 34000	OTC Deluxe Compression Tester Kit
Adapter sizes	14mm and 18mm³	with a 14-mm fitting on the end. OTC also includes 10-, 12- and 18-mm adapters¹
Gauge units	0-300 PSI and 0-21 BAR³	0 to 300 PSI and 0 to 2,100 kPa¹

More details

Specification	Tool Aid 34000	OTC Deluxe Compression Tester Kit
Hose length	Not published	25 in¹
Deep-well adapter	Not published	Yes²
Dial size	Not published	Not published
Case	Not published	Hard case²
Spare seals included	Not published	Yes²
Gauge protection	Not published	Yes²
Engine type	Gasoline³	Gasoline²
Maximum gauge reading	300 psi³	300 psi¹