Diesel Truck CompareRebuild Picks

Rebuild Picks

Engines ranked by rebuild potential: parts, machine shop support, aftermarket, and community knowledge. Tiers are editorial opinion. Rebuild and upgrade content stays emissions-compliant; check local law.

TierEngineYearsPartsShopAftermktCommunity
Tier ACummins 6BT 5.9L 12-valve1989–1998
Tier ACummins ISB 5.9L 24-valve1998–2007
Tier ADuramax 6.6L LB7 V82001–2004
Tier ADuramax 6.6L LBZ V82006–2007
Tier AFord 7.3L Power Stroke V81994–2003
Tier BCummins ISB 6.7L2007–2026
Tier BDuramax 6.6L LMM V82007–2010
Tier BFord 6.7L Power Stroke V82011–2026
Tier BDuramax 6.6L LLY V82004–2006
Tier BFord 6.0L Power Stroke V82003–2007
Tier BDuramax 6.6L L5P V82017–2026
Tier BInternational 7.3L IDI V81989–1994
Tier CDuramax 6.6L LML V82011–2016
Tier CFord 6.4L Power Stroke V82008–2010
Tier CGM 6.2L Detroit Diesel V81989–1993
Tier CGM 6.5L Detroit Diesel V8 (naturally aspirated)1994–1995
Tier CGM 6.5L Turbo Detroit Diesel V81992–2000