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.
Certain types of oil work better in hoses
( z1 work :ARG1 ( z2 oil :mod ( z3 type :mod ( z4 certain ) ) ) :location ( z5 hose ) :ARG1-of ( z6 have-degree :ARG2 ( z7 good :ARG1 z1 ) :ARG3 ( z8 more ) ) )