How to check engine vacuum hoses<br>Check each hose for bulges and swelling. If a hose feels soft or spongy when you touch it, this can indicate damage caused by your car's oil. [substeps] A swollen hose that is cracked and hard is often caused by heat damage.
These checks are taught to auto repairmen
( z1 teach :ARG1 ( z2 check :mod ( z3 this ) ) :ARG2 ( z4 person :ARG0-of ( z5 repair :ARG1 ( z6 auto ) ) ) )