5.7L Hemi manifold bolts and lifter tickmajor
The Hemi's cross-generation risks don't skip the newest year: exhaust-manifold bolts can snap (a cold-start tick that grows) and the cam-and-lifter valvetrain can wear (a deeper tick, then misfire). Independent mechanics quote a cam-and-lifter repair at a minimum around $4,500, with engine replacement often recommended once metal appears — though on a 2023 much of this may still be covered by the 5-year/60,000-mile powertrain warranty. Cold-start and listen; a Pentastar V6 avoids the Hemi-specific risk, and note that from 2023 the Hemi came only in eTorque form.
Sources: NHTSA complaint database, 2023 Ram 1500 (body-style-aggregated) · Independent mechanic channel transcripts (5.7 Hemi manifold/cam/lifter; eTorque MGU teardown)
~$4,500
Cam + lifter repair if out of coverage (mechanic-quoted min)
higher
Engine replacement (often recommended)