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So along with new valve springs and lifters, I also replaced the valve stem seals in my 4.7L, last month. Last summer I'd get a puff of white smoke when pulling off from a stop sometimes, so it was in the plans before the lifter seized and forced me into action.
Smoke is gone now, but I wanted to see how clean its burning. I cleaned out the soot from the tailpipe with some rags, a toothbrush and brake cleaner. Roughly 600 miles later and it's still clean... like burning natural gas, or a new engine.
Not too shabby shabby for 314K! Maybe I should extend my full syn oil changes beyond 7.5K? Just kidding.
The ladies Durango has that problem.
how long did it take to do all that work?
Like a month? Dude, i was quarantined so i stretched it out as long as possible so I could stay out in the garage drinking beer. I was too greasy for the wife to ask me to do anything else. Couple of lost keepers and valve spring retainer caps had me waiting on parts too.
The ladies Durango has that problem.
how long did it take to do all that work?
Like a month? Dude, i was quarantined so i stretched it out as long as possible so I could stay out in the garage drinking beer. I was too greasy for the wife to ask me to do anything else. Couple of lost keepers and valve spring retainer caps had me waiting on parts too.
Throwing up a pic of the tailpipe taken today. Still no soot even if I drag my finger in it and zero oil loss. Look deeper in and you'll see where the old soot starts. New stem seals are the ****!
4 yrs later @ almost 343K mi. I never cleaned the tailpipe since I did after putting in new stem seals in 2020 and still no soot! Sorry if I couldn't catch much of it due to bad lighting. I don't drive the truck much anymore, just weekends and short trips (I have an EV now and can't justify the gas expenditure) but I believe half a million miles wouldn't be a problem for it. Engine and transmission are working flawlessly.
Glad you're having good luck, did stem seals in my 4.7 a couple weeks ago for smoke on start up. Still doing it, so I'm thing ring/cross hatch failure.
Glad you're having good luck, did stem seals in my 4.7 a couple weeks ago for smoke on start up. Still doing it, so I'm thing ring/cross hatch failure.
Are you losing any coolant or hard starting? Sometimes you'll get coolant leaking into the cylinders if you have a failing head gasket.
05-10-2020, 08:55 AM
4.7L - Tested the new valve stem seals
