It's been over thirty years since I was inside a diesel, but here are a few thoughts:
1. It should be nearly impossible for oil to leak pass the valve guides on a turbocharged engine, since both intake and exhaust ports have positive pressure most of the time, and oil under the valve cover shouldn't have any pressure. The only way oil is going to make it into the exhaust is if it's under pressure.
2. Is your customer ABSOLUTELY CERTAIN the oil problem didn't exist before the first "rebuilder" went into it? That's important! If it was OK before it was worked on, then the first guy put it back together wrong and you just repeated his mistake. But if it was already blowing oil when he took it in, then something broke inside the engine and neither of you have found it.
3. Do you know exactly what, if anything, the first guy touched in the engine? Were injectors pulled? Sleeves pulled?
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Today's Featured Article - Upgrading an Oliver Super 55 Electrical System - by Dennis Hawkins. My old Oliver Super 55 has been just sitting and rusting for several years now. I really hate to see a good tractor being treated that way, but not being able to start it without a 30 minute point filing ritual every time contributed to its demise. If it would just start when I turn the key, then I would use it more often. In addition to a bad case of old age, most of the tractor's original electrical system was simply too unreliable to keep. The main focus of this page is to show how I upgr
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