Not necessarily. Some newer…
Not necessarily. Some newer engines have individual cylinder sleeves that are merely clamped between head & crankcase. The Northstar V8 that GM used in some older Caddys was a prime example of this method. Those engines weren't very reliable & had a habit of blowing head gaskets. It's possible the Turbomax engine was made using the same method, & this would explain replacing only 2 cylinders. They should have replaced the entire engine.