Where are you finding the engine for that price without a core? I found one here for $7800 plus $1000 core.Yup, it's under the intake. You have two options. You can either replace the entire line with another OE part or you can just replace the rubber hose with a high temperature hose. Since you have 278,000 miles on your engine, you may consider buying a new engine, or saving money for a new engine. New engines have a 3 year/100,000-mile warranty and cost about $7,500 shipped for free and no core charge. New engines come complete with a new CP4 pump, new injectors, and new turbo. It's just something to think about.