I have needed to replace two of my six injector lines, no.3 and no.6. Both cracked at the base at the IP.

Fortunetly, I had 2 of the 6 lines from off the old engine to use as spares, the other 4 are missing.

The first time it happened I had to drive 40 miles to home running on 5 cylinders. One of the two spares was the wright no.3 line and installed it. When I started the engine, it began to make a very loud wrap, I drove the car around the block to see if it would go away but it continued. Then I stompped the pedal to the floor for a second or two and the loud wrap went away.

Since that time, approx. 7000 mi, no. 6 inj. line cracked too and had to drive about 60 mi. under 5 cylinders back home to fix. After replacing the line, this time I had to rebend the remaining spare to fit, I started the engine and it began to wrap loudly, just as it did before the first time. This time it took several "pedal to the floor method of repair" to stop the wrap.

Questions: Could the above two scenarios cause the lifters to
collaps, and if so, why?

Is there an alternative to $33 a piece,
injector lines. Can I make my own?