.lose tie rod  .ltr  .ltb

1. Cylinder beam would flex and lift at location of slacken tie bolt.
2. Rigidity of whole structure will be destroyed
3. Noise & vibration will increase
4. Other tie bolt will be overloaded leading to fatigue failure
5. Machined mating surfaces will rub together and wear away … fretting
6. Due to Fretting, Machined faces would eventually be destroyed.
7. If fretting and tie bolts are tightened, cylinder to piston stroke alignment destroyed.
8. If tie bolts are tightened on damaged face, bending moment is induced in tie bolts
9. Misalignment between bedplate, frame and entablature
10. Misalignment between xhead guide liner and stuffing box leading to excessive wear.
11. Misalignment of main bearing and other sliding surface
12. Transverse girders bend which could lead to cracking

The tie bolts are located close to the centre line of the engine

1. The combustion forces acting on the cylinder head passes through the tie bolts
2. As load increases tie bolt tend to pull transverse girders upward and load on bearing pockets tend to push downward. So the transverse girders are always subjected to a bending moment which is restricted by tie bolts
3. As bending moment is the product of force & distance, the greater the distance, the greater would be the bending moment 
4. So, to avoid excessive bending moment tie bolts are located as close to the centerline of the engine as possible.