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.
It is important to frequently check the engine vacuum hose
( z1 important :ARG1 ( z2 check :ARG1 ( z3 hose :mod ( z4 vacuum ) :part-of ( z5 engine ) ) :ARG1-of ( z6 frequent ) ) )