Have an 01' F250 7.3L. The local Ford shop said it is the orange intake hose, and the closest thing I can fnid online looks like it is also called intake manifold hose. However, i cannot seem to find those online anywhere, wondering if anyone knows where I could. Also it is is as easy to put new ones on as releasing the clamps, swap out the hose and reclamp.

They also said the rear main seal is leaking, and quoted about $700 to fix. foudn online the seal for $66, does it seem normal to be around that price? Tey mentioned they would need to remove the transmission... Just want to make sure that what they say sound legit. They replaced the fittings on the high pressure pump which were supposedly leaking, and tightened the clamps on the orange intake hose, but still leaking, about 2 quarts in a week with 200 miles, 100+ of which was hauling about 7000lbs in horses/trailer.

Also, so there tend to be typical issues seen in 01' 7.3's that are around 170,000 miles we should be aware of?

Thanks for any help!