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.
A broken hose is usually from heat problems.
( z1 cause :ARG0 ( z2 problem :topic ( z3 heat ) ) :ARG1 ( z4 break :ARG1 ( z5 hose ) ) :mod ( z6 usual ) )