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.
If the hose is not swollen, it has not been impacted by heat
( z1 impact :polarity - :ARG0 ( z2 heat ) :ARG1 ( z3 hose ) :condition ( z4 swell :polarity - :ARG1 z3 ) )