Hey folks I've been used diesel hunting and I've found a 2005 Ram 3500 5.9 4x4 238,000 miles that I'm going to go look at. I'm not diesel saavy so any pointers on what to look at engine wise would be appreciated. It's a auto(really wanted a 6 speed manual) but it's been built by suncoast, who is very reputable in the area, maybe one of the best in the country. Ive heard you can check for blow by, by taking the oil cap off while the engine is running. Is that something I should do? What would I be looking for exactly? I felt really good about this one being decent until I had the guy send some extra pictures and there was two 10" subwoofers built in under the back seat. I'm all for having the subs but it makes me think this may have been owned by a younger person which may mean it's been ragged on or not kept up with service wise. Any advice would be appreciated.