Unfortunate report on new Ram
From an earlier thread we ordered and got our brand new Ram 3500 6.4 on August 23. We were in the process of putting 500 miles on her so we could change the rear differential fluid to take her on our ...
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Turtle n Peeps wrote:
Bovine excrement. Bent valves don't seal. Bent valves get bent because there was interference with something...….like a piston. If the guide is a little tight the valve will stick open. When this happens the piston will come up and whack it. When this happens the valve bends. When this happens the valve does not seal and you get a misfire code.
Next time you're back at the dealer get real close to the service writers face; talk real slow and real quiet and ask: "how does a bent valve seal and not show up in a compression test or leak down test?"
^I'm in agreement with this as well. A single valve being damaged pre-assembly, sure. If the vendor's and FCA's QA's processes were completely inoperative at the time of your build. 2 vales? Not a chance.
BTW - The dealer absolutely should have done a compression test before even taking the first plug out. A "relative compression" would have shown them the weak cylinder just by cranking it over with the computer hooked up. At that point, this would be cause to dig deeper (and it would also rule out bad cause as a primary cause, unless it was running so lean it burned up a valve, but there would be other codes for that as well). Once the relative compression test shown a fail result, the diagnostics guide would call for those more invasive tests.
