Mastercool 43060-BOC — Block Off Caps for Diagnostic Smoke MachinesProfessional block off caps for Mastercool diagnostic smoke machines. Essential accessory set for sealing various openings during smoke leak testing on EVAP systems, turbo/intake systems, and other sealed automotive systems.Key Features: Multiple Cap Sizes – Various sizes to fit different openings Universal Compatibility – Works with all Mastercool 43060 series smoke machines Durable Construction – Built for repeated use Essential Accessory – Required for effective smoke testing Professional Quality – Built to Mastercool standards Complete Set – Multiple caps for various applications Specifications: Model: 43060-BOC Type: Block off caps set Compatible with: All Mastercool 43060 series smoke machines Weight: 10 kg (shipping weight) SKU: 43060-BOC HS Code: 84189910 Compatible Smoke Machines: 43060-EV — EVAP Diagnostic Smoke Machine 43060-HD — HD Truck Diagnostic Smoke Machine 43060-TB — Turbo/Intake Diagnostic Smoke Machine Other Smoke Machine Accessories: 43060-OL — Smoke Producing Fluid 8oz (240ml) 43060-DW-LG — Diffuser Assembly - Long 43060-DW-ST — Diffuser Assembly - Short 43060-EVSRT — EVAP Schrader Valve Remover/Installer 43060-EVTP — EVAP Test Port Adapter Applications: EVAP system leak testing Turbocharger and intake manifold leak detection Vacuum line leak testing Exhaust system leak detection Sealing various openings during smoke testing Automotive diagnostics What are Block Off Caps?Block off caps are used to seal various openings in automotive systems during smoke leak testing. When performing a smoke test, you need to seal all openings except the one where smoke is introduced and the suspected leak area. These caps come in various sizes to fit different hose connections, ports, and openings commonly found in EVAP systems, intake manifolds, and other sealed systems.Why Block Off Caps are Essential: Effective Testing – Properly seal system to build pressure for leak detection Accurate Results – Prevent smoke escaping from known openings Versatile – Multiple sizes fit various applications Time-Saving – Quick and easy to install and remove Professional Service – Essential tool for smoke testing Common Uses: Sealing EVAP purge and vent lines Blocking intake manifold vacuum ports Capping fuel tank vent lines Sealing PCV system openings Blocking brake booster vacuum lines during testing Sealing any opening that needs to be temporarily blocked How to Use: Identify all openings in the system being tested Select appropriate size cap for each opening Install caps on all openings except smoke inlet and test area Introduce smoke into system Monitor for smoke escaping from leaks Remove caps after testing is complete Maintenance: Inspect caps regularly for cracks or damage Clean caps after each use Store in protective case or container Replace damaged caps to maintain seal integrity Keep set complete for maximum versatility Professional Quality: Mastercool smoke machine accessories are manufactured to professional standards for reliable, effective automotive diagnostic testing.