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 hoses can swell or be soft
( z1 possible :ARG1 ( z2 or :op ( z3 swell :ARG1 ( z4 hose :mod ( z5 engine ) ) ) :op ( z6 soft :ARG1 z4 ) ) )