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Within Electrical Repairs, Compression Testers covers the engine-diagnostic tools used to measure cylinder compression pressure and to identify worn rings, valve seal failures, head-gasket leaks, and other engine-condition issues. Compression testing is a fundamental engine-diagnosis step — a routine that confirms whether the engine's combustion chambers are sealing correctly across all cylinders.
Parts for Machines supplies compression testers for petrol and diesel engines across the automotive, agricultural, plant, and commercial-vehicle ranges. Petrol compression testers screw into the spark-plug hole and read peak compression pressure; diesel compression testers screw into the injector or glow-plug hole and read the (much higher) diesel compression pressure on a separate gauge scale.
Within Compression Testers you will find Petrol Engine Compression Testers (typical scale 0-300 PSI / 0-21 bar, with screw-in adapters for the common spark-plug thread sizes), Diesel Engine Compression Testers (typical scale 0-1,000 PSI / 0-70 bar, with adapter sets for the common diesel injector and glow-plug threads), and Combination Kits with both petrol and diesel adapters and gauges.
Product pages list the gauge scale (in PSI, bar, or both), the gauge accuracy (typically ±2-3% of full scale on trade-grade testers), the adapter set included (the spark-plug, injector, or glow-plug thread sizes covered — common sizes M10, M12, M14, M18 with extension hoses for engines with deep plug wells), the hose length (300mm-600mm typical), and the gauge-and-hose connection. Compression testing is a comparison test as much as an absolute test — readings should be similar across all cylinders within a few PSI or bar of each other. Significant variation (more than 10% between cylinders) indicates a problem in the low-reading cylinder. Trade pricing on multi-tool and workshop-kit orders is available; contact the team via WhatsApp 07754288583.
| Model No | CT951 |
|---|---|
| Brand | Sealey |
| Nett Weight | 0.38kg |
| Model No | CT955 |
|---|---|
| Brand | Sealey |
| Contents | Adaptors; 10, 12, 14 & 18mm, Straight & Angled Push-On Connectors, 300mm Flexible Extension, Ø63mm Gauge (300psi(20kg/cm²)) |
| Nett Weight | 1.17kg |
| Model No | VSE6156 |
|---|---|
| Application(s) | |
| BMW 1 Series | 116i E81/82/87/88 (04-09), 118i E81/82/87/88 (04-14), 120i E81/82/87/88 (04-14), 125i E82 (07-12), 130i E81/87 (05-12), 135iS E82 (07-12) |
| BMW 3 Series | 316i/ti Compact E46 (01-07), 316i E90/91/92/93 (05-14), 318i/ti Compact E46 (01-07), 318i E90/91/92/93 (05-12), 320i E90/91/92/93 (05-12), 323i E90/91/92/93 (04-11), 325i E90/91/92/93 (04-12), 330i E90/91/92/93 (04-14), 335i E90/91/92/93 (04-14) |
| BMW 5 Series | 520i E60/61 (07-10), 523i E60/61 (04-10), 525i E60/61 (04-10), 530i E60/61 (05-10) |
| Model No | VSE300D |
|---|---|
| Brand | Sealey |
| Nett Weight | 1.89kg |
| Model No | VSE206 |
|---|---|
| Brand | Sealey |
| Nett Weight | 1.74kg |
| Model No | VSE204 |
|---|---|
| Application(s) | Audi, Citroen, Dacia, Daihatsu, Fiat, Ford, Isuzu, Lancia, Land Rover, Leyland/DAF, Mazda, Mercedes, Mitsubishi, Nissan, Peugeot, Renault, Rover, Seat, Toyota, Vauxhall/Opel, Volvo, VW |
| Brand | Sealey |
| Contents | Gauge Hose & Quick Connector, Glow Plugs; M10 x 1.25, M12 x 1.25, M14 x 1.25, M10 - Long, M10 - Short, Adaptor M18 x 1.5(M) - M12 x 1.25(F) , Dummy Injectors; M24 x 2, Stanadyne, M20 x 1.5 Glow Plug Adaptor; M10 x 1.25, M10 x 1, 90° Quick Coupling Elbow, Bridge Clamp & Service Kit |
| Nett Weight | 2.45kg |
| Model No | VSE3155 |
|---|---|
| Brand | Sealey |
| Contents | Spark Plug; 10, 12, 14, 18mm, Glow Plug Adaptors; Alfa Romeo, BMW, Chrysler, Citroen, Daewoo, Fiat, Ford, Honda, Hyundai, Isuzu, Jeep, Kia, Lada, Lancia, Land Rover, LDV, Mazda, Mercedes, MG, Mitsubishi, Nissan, Peugeot, Renault, Rover, Saab, SsangYong, Suzuki, Toyota, VAG, Vauxhall/Opel, Volvo, Injector Adaptors; M20, M22, M24 , Ford Stanadyne Injectors plus Clamp-On Injectors |
| Nett Weight | 4.38kg |
| Model No | VSE3158 |
|---|---|
| Application(s) | Glow Plugs; Alfa Romeo, Audi, BMW, Cadillac, Chrysler, Citroen, Dacia, Dodge, Fiat, Ford, Honda, Jaguar, Jeep, Lancia, Land Rover, Mazda, Mercedes, MG, Mini, Mitsubishi, Nissan, Peugeot, Porsche, Renault, Rover, Saab, Seat, Skoda, Suzuki, Toyota, Vauxhall/Opel, Volvo, VW |
| Brand | Sealey |
| Contents | M17, M20, M24 |
| Gauge Scale | 0-70bar(0-1000psi) |
| Model No | VS2044 |
|---|---|
| Brand | Sealey |
| Contents | Glow Plug Adaptors; Alfa Romeo, BMW, Chrysler, Daewoo, Fiat, Ford, Hyundai, Isuzu, Land Rover, LDV, Mazda, Mercedes, Mitsubishi, Nissan, PSA, Renault, Saab, Suzuki, Toyota, VAG, Vauxhall/Opel, Volvo Diesel Engines, Injector Adaptors; M20, M22, M24 & Ford Stanadyne Injectors plus Clamp-On Injectors |
| Nett Weight | 4.13kg |
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