My '98 v70 NA has had a no start condition (probably lifter pump down--see previous post a few minutes ago) that has required extended cranking. During the course of this, the plastic hose between the throttle body and AMM blew out, huge piece missing--almost half of the hose. Probably 10 square inches of material.

There are a few small pieces of hose littered around the engine bay. No pieces up toward the AMM and air filter. A few small pieces down toward the TB. Funny thing is that there is a *lot* of hose missing, and no sign of where most of it went. Have looked pretty thoroughly. Could be in some hidden part of engine bay, but seems unlikely.

2 things: 1) I'm trying to figure out what happened. Did the car backfire through the intake manifold and blow the hose out (if the lifters are malfunctioning), or did it somehow implode from vacuum inside the hose? Rest of hose fine, not obviously weak, cracked or broken. Edges of hole are clean.

2) Obviously I want to keep hose material out of the engine. I'd like to avoid pulling the intake manifold, so was thinking I could pull throttle body, inspect inside the plenum and runners of the intake manifold. If manifold clean inside, maybe OK. Or do I really need to pull the manifold, shake it out, and look inside the ports in the head? How damaging would thin plastic be? Not like a nut or bolt getting in there, but not something you want either.

Car must have cranked for an extended time after this happened, didn't hear any sounds suggesting foreign material getting into valves or cylinders.