OEM Quality, High RPM Insurance

Merchant automotive’s tig-welded water pump

- Mike Mcglothlin

With a 19-year track record under its belt, it’s safe to say the Duramax is one of the more reliable diesels to ever grace the ¾-ton and larger truck segment. Sure the LB7 had injector problems and the LLY’s ran hot, but by and large the 6.6L V8 holds up remarkably well—regardless which generation engine it is. We’ve even seen well-maintained Duramax mills accumulate more than 700,000 miles without n