Originally Posted by crispyboy
It can happen to any brand but typically it is a casting issue but sometimes it is a design issue.
From 1999 to 2001 Cummins had a B series engine which was known as the "53" casting block could develop cracks.
Cummins # 53 Block Casting | Identification, History, & Repair
Another engine that was known for cracked blocks were the Cadillac Northstar engines. A member in our family had one of these infamous cars that developed a crack.
It wouldn't surprise me that there isn't more trouble with cracked blocks as auto manufacturers are always trying new methods/materials to get costs down. Most engine troubles seem to show up with warped cylinder heads where an aluminum alloy is used or the manufacturer doesn't use enough or the correct type of fasteners to keep the cylinder head from warping.
I would keep driving the vehicle with the new engine but one thing you may want to do is let the engine idle for a couple of minutes after making a particularly hard tow or driving the interstate - this helps to cool down the internal components or other hot spots in the water jacket.
Regarding the Cadillac Northstar engine, my mother has a 2003 Sedan DeVille which experienced this problem as evidenced by the #4 cylinder "hydraulically locking" with coolant after engine shut-down, which is actually due the steel head stud threads electrolyzing with the aluminum block threads and thus releasing the torque holding the heads against the gasket. The dealer fix was to R&R the engine and install "time serts" in the block for ~$4,000.
My solution was to pour a new product, "Bar's Leaks Head Gasket Fix" (rear label actually states that it fixes Northstar engines), into the coolant system which after ~two years has maintained the problem.
The product has also maintained my 1990 Lincoln Continental engine with head gasket problems. The stuff seems to really work.