5.9 Cummins 24v 53 Engine Block The Cummins "53" Block was used in Cummins 24 valve ISB diesel engines from 1998.5-2002. Manufactured by Brazilian company, TUPY. The "53" block casting has thin water jacket walls that are susceptible to cracking. With coolant cavitation, corrosion, coolant pressure in the block, frequent or heavy towing they may crack, causing a loss of … [Read more...] about 5.9 Cummins 24V Diesel Engine: 53 Block Problems