Ford 6.7 with spun connecting rod bearing
Hello to all, I am new to this forum. I own a 2015 F-250 with the 6.7. I was in the process of hooking the truck to my 5th wheel (April 15th) for a spring break trip when the truck started to shutter...
Forum Discussion
FishOnOne wrote:
Put some 15W40 in a 19+ cummins and see how it sounds!
Honest question, what does it sound like and why is it an issue?
(Not "it can cause deposits to form in the lifters" but what is the difference between Cummins hyd lifters and every other engine?)
And why would 5W40 be "recommended" but 15W40 cause engine damage.
I'm no expert, but understand engines fairly well and this doesn't compute.
Edit, I can understand if tighter tolerances, maybe very small bores in the pushrods or lifters themselves (not unlike the Ford Triton engines, one of the first to recommend lightweight oil back in the day). And with that I can see it causing pressurizing issues upon cold starts in cold weather (hence the 5W cold weather recommendation). And the "noise" you speak of is likely? lifters that are slow to pressurize initially? Maybe?
But I can't wrap my head aorund the propensity for "deposits" to form or any issues when NOT in cold weather.
But jsu tme talking....
