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New genuine BorgWarner S300A106 turbocharger, BorgWarner 174822, for Mack E7 12.0L engines, replacing Mack 631GC5174M and BorgWarner 173737. Mack used many different turbochargers on the E7, so match the Mack number on your existing turbo’s tag.
Specifications:
Compatibility / Fitment:
Fits Mack E7 12.0L engines originally equipped with a turbocharger in the Mack 631GC5174 family.
Hard fitment gate — match the Mack number on your turbo:
Mack used many different turbochargers on the E7 (S300, S400 and other families) depending on rating and year, and they aren’t interchangeable. Read the Mack number on your existing turbo’s tag and order this unit only if it’s in the 631GC5174 family. We stock the other E7 turbos as well.
Installation: Fit a new mounting gasket set, replace the oil supply and drain lines if they’re coked or damaged, and pre-fill the bearing housing with clean engine oil before first start. Don’t use liquid sealant on oil or exhaust connections.
Pair with: BorgWarner turbo mounting gasket set 318417.
Rebuilding instead of replacing: the CHRA for this turbocharger is BorgWarner 174847, and the repair kit is 318394.
Also available remanufactured: BorgWarner remanufactured and other remanufactured versions of this turbocharger.
Common interchanges: Mack 631GC5174M, 631GC5174MX, 631GC5174BM; BorgWarner 173737
Conclusion:
A new genuine BorgWarner S300A106 turbocharger for Mack E7 12.0L engines, replacing Mack 631GC5174M and BorgWarner 173737. Match the Mack number on your existing turbo, since the E7 used many different turbos.