Dd15 maintenance questions

[Rawze]

I can't find the TSB's on it but DD's have an inherent problem as they age where is says something about never changing the fuel filter and oil + oil filters all at the same time. Big lawsuits have been made over this in the past against oil change places who do the typical drop the oil, all the filters including fuel, dacvo if there is one, etc.. all at the same time .. put new oil in, put new filters back on and then crank it up. That extra delay in firing off due to fuel pressure lag + the oil pressure not up to snuff yet = known issue being high chance of spinning a main bearing and destroying the crank/engine. It can do this even if they pre-fill the filters.


So....

Always ensure whenever the oil is replaced... change the oil and oil filter only ... crank it up and let the oil pressure build back up good before going any further. Then change the fuel filter separately. Otherwise, the older the engine gets, the higher chance of it loosing a bearing.

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here is another FYI:

dd15's ... The starter is on the exhaust side of the engine... below the hot exhaust piping. - i can;t tell you how many people that I have met, were totally stranded at a truck stop fuel island with their DD's not wanting to crank. They call a tow-truck because no matter what they do it will not crank ... just some faint clicking maybe. Half an hour or so later, by the time the tow-truck arrives .... engine fires right off again without any issue. There is never any faults or codes in the dash... nothing. it simply leaves you stranded.. and it is a common issue.

- The reason it happens is that someone is pulling a hill and exhaust is really hot... or it went into regen or some other thing that got the exhaust real hot. The driver pulls off the freeway and into a fuel island.. and shuts truck off and exhaust is still quite hot. - All that heat bleeds into the exhaust side of engine and block and it trips the starter over-temp sensor.. and the thing will refuse to crank until the whole thing cools off, sometimes 20 - 30 minutes later or more.

Just an FYI: Seen several people with my own eyes this happened to ... Pour several gallons of water on the exhaust side of the engine block and around/onto the starter to cool it off ... and it fires up again... no need for a tow-truck. - I also then remind them to always let the engine and its exhaust cool off for several minutes before shutting engine down and it will prevent it.