quote:That is not sludge. It's a mixture of water vapor and oil vapor condensing in the cold oil filler tube. The 4.7 is not a sludge engine provided that at least rudimentary maintenance is performed on it. It's the design of the oil filler tube/PCV valve location that causes it to happen. The GM 2.2L OHV and 2.3L "Quad 4" engines also developed this, (a similar designed oil filler tube...Imagine that!) and I can't think of a single situation where it was determined that one of these engines failed because of it. Quit using unfounded scare tactics to draw people away from an excellent engine. BTW, the majority of the people who have complaints listed on that website do not even have the 4.7L engine in their Durangos. It wasn't an option till 2000, and a lot of these complaints are about 1998 or 1999 models, which would have had the 5.2 or 5.9 engines. This engine was virtually indestructible, and never ever had sludge problems with normal (or even shotty) maintenance schedules. Just look at the car-dumb people that don't even know what's under the hood of their vehicles. I realize there are people out there that don't have clue one about cars, but some of these complaints seem too far-fetched to even be believeable. OK, I'll get off my soap box now. -Mike Proud owner of a 2001 Dodge Durango 4.7L with 105,000 completely trouble-free miles on it.
Originally posted by troy_heagy: Gee, it all sounds so innocent, but as this mechanic says: "It indirectly admits that they have a problem and attempts to cover up the fact that the engine is (in trade terms) a smog sludge motor," Automan told us. "They have you put a different valve cover and baffle on the engine in an attempt to hide the fact that the engine develops sludge." "Anyone who pulls the cap off the oil fill and finds crud and sludge on the oil cap should be worried," Automan advises. Troy (Automan is an ASE-certified master mechanic. He runs an independent auto repair shop in North Carolina. )
quote:You probably know me on the DOC as "TheDodgeGuy". Never bothered to change my username here from back in the days when I had my Grand Prix. (The one and only GM car that I've ever owned)
Originally posted by thunderchild: GTMike: Thank you for that. i am tired of telling people this. The 4.7 is a great engine. No maintanance, no engine!
quote:In case of what? The oily "snot" will appear whether you use the best of the best synthetics or the cheapest dino oil on the market, and the engine will last 200,000+ miles on either one.
Originally posted by MonkeyWrench73: So I guess its a good Idea to run a good quality synthetic in the 4.7/3.7 just in case.
quote:Another thing...Wouldn't a vehicle specific owner's club be the first to notice or mention a known problem? Over at the DOC and/or Dakota-Durango.com, it's never been mentioned, whith the exception of this consumeraffairs.com site which is what is used there to exemplify people's ignorance when it comes to vehicles, or just something to laugh at. Nobody that I know of on either site has ever lost an engine due to sludge. That should tell you something right there...The people that (supposedly) had engines fail probably have just barely enough automotive knowledge to properly insert the gasoline filler nozzle into the filler neck. The DOC has been beneficial in being the first to know about other problems these vehicles have, such as upper ball joints (long before they were recalled), governor pressure solenoids, and even stupid things like the fix for the front end squeak (lube the swaybar bushings). If sludge problems actually existed in normally maintained engines, there would be much talk about it on the DOC, but as it turns out, there's none whatsoever. So who ya gonna believe? Durango enthusiasts, or the car-dumb general public? I know where I'll be getting my advice, that's for sure.
Originally posted by thunderchild: GTMike: I am on that site almost everyday. This is a good site. I have learned alot here.