Two hollow dowels (one at 3 o’clock, one at 9 o’clock on the block face) ensure concentricity.
If you need a replacement, various housing types fit the ISX engine line, often depending on your vehicle make (e.g., Peterbilt, Kenworth, Freightliner): Cummins ISX 15 flywheel installation Cummins Isx Flywheel Housing Torque Specs
In specific service bulletins for loose bolt issues, updated specs as high as 243–297 lb-ft have been cited for replacement bolts with washers. Flywheel-to-Crankshaft Specs Two hollow dowels (one at 3 o’clock, one
Use guide studs to align the housing and install a new gasket or O-ring [4, 5.7]. Tighten the bolts in a crisscross or zigzag pattern , starting from the center and moving outward [5, 10]. Verification: After installation, it is standard practice to measure bore alignment runout Tighten the bolts in a crisscross or zigzag
: Lubricate the bolt threads and the underside of the bolt heads with clean 15W-40 engine oil before installation. Critical Installation Steps