Description
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Detroit & Cummins Coverage: 4.1mm & 4.6mm for Detroit DD13/DD15/DD16; 7.0mm for Cummins ISX—precise Jake Brake lash setup. Replaces W470589022300, W470589042300, 3163530.
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Angled Access Blade: Slim, offset gauge tips slide between actuator piston and exhaust valve for quick, repeatable measurements in tight rocker spaces.
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Shop-Grade Build: Hardened alloy steel gauge blades with a corrosion-resistant finish and textured, non-slip handles for confident control in oily bays.
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Serial-Break Notes: Use 4.1mm or 4.6mm per Detroit serial break (HDE0077481/DD15/16; HDE0079072/DD13) to match OEM procedure.
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Pro & DIY Ready: Cuts setup time, improves accuracy, and reduces rework versus bent flat feelers—ideal for fleets, owner-operators, and diesel techs.
Fitment Chart
Make Model Engine Years Freightliner Cascadia Detroit DD13/DD15 2012–2025 Western Star 5700XE Detroit DD15 2014–2022 Peterbilt 389 Cummins ISX15 2007–2025 International ProStar Cummins ISX/ISX15 2008–2017
Dial in Jake Brake lash fast with the Oni Tools 3-Piece Engine Brake Feeler Gauge Set. Purpose-built for heavy-duty diesel service, this kit includes 4.1mm and 4.6mm gauges for Detroit DD13/DD15/DD16 engines and a 7.0mm gauge for Cummins ISX. The angled, low-profile tips slide cleanly between the actuator piston and exhaust valve, allowing you to measure lash precisely without fighting tight clearances. Blades are precision-ground from hardened alloy steel and paired with textured handles for secure grip under shop conditions. The set replaces OEM references W470589022300 (4.1mm), W470589042300 (4.6mm), and 3163530 (7.0mm), aligning with Detroit serial-break lash specs where applicable. Whether you’re a fleet tech or DIY owner-operator, this kit helps prevent brake drag, protects valvetrain components, and keeps engine braking performance on point.
