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.
engine vacuum hoses are usually painted black
( z1 paint :ARG1 ( z2 hose :mod ( z3 vacuum ) :part-of ( z4 engine ) ) :ARG2 ( z5 black ) :mod ( z6 usual ) )