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  #1  
Old 08-20-2010, 11:26 PM
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Question 4.7 oil sludge-rockers falling off

I'm not having these problems, and I hope I never do! I have read several complaints on the internet (google 4.7 complaints or reliability), about the 4.7 running to hot and creating oil sludge that plugs up the oil suction tube, causes oil pressure gauge to go to 0, and basically lunches the engine. They also talk about misfires on different cylinders, rocker arms falling off when starting, and radiators splitting in two, etc..
What I want to know is are these common problems with that engine? Is it something I should worry about?, I run 5w30 Pennzoil Platinum (synthetic oil) changed at 3k-3mo. or before.
Please let me know what you know about this, and do I need to start saving $6000 for a new motor one day soon! They say these things happen rather abruptly.
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Old 08-20-2010, 11:40 PM
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I don't know the answer, but I'm interested to find out.
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Old 08-21-2010, 11:05 AM
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These things DO happen - usually to engines that haven't been properly maintained. The rockers coming off are attributed to the valves sticking. As for sludge, I have 88k on my engine and when I had the front cover off last fall it was clean as a whistle inside. I use M1 synthetic and change it every 5k.
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Old 08-31-2010, 06:58 PM
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I need to comment on this as I have a problem you listed above...


I have multiple missfires and ive spent alot of money trying to fix the problem. My truck only has 35K on it and ive never towed anything heavy(more then 3k). My only "beating" on the truck is I get pissed that the thing doesnt downshift and I just give it more gas to force it to downshift when I want it too. Other then that I baby this truck.

I love dodge trucks but unfortunately I cant afford to keep fixing this motor so I need to find something else. Worst part is I still owe alot of money on this truck so Idk where to go now.

Just to note: so far ive replaced all plugs...and had the injectors, and fuel pump/pickup replace. The later not being by choice but the truck was leaking gas somehow and my mechanic said thats what it needed. Personally I think im getting pushed around on how to fix the problems.

As much as Id hate to say it...im looking at getting trading my truck in for a newer style tahoe...as much as I love dodge trucks this truck has left a VERY sour taste.
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Old 08-31-2010, 08:54 PM
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my rad split in 2 at 60 k
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Old 08-31-2010, 09:04 PM
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hmm, you might want to hear from some of our techs, I will say i had a 2004 ram regular cab with the 4.7 i traded it for a 05 of laramie with a Hemi, I run into the guy who bought that ram i traded , the 04 with 4.7 at convienance store 6-10 times a year, his engine blew at 60k, hes an older guy in his 60s and drives like an old lady, im not shore if he maintained it ? he said the radiator also went 10k before the engine blew, SOUNDS LIKE MAYBE THE 1ST GENERATION OF 4.7s have some problems
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Old 08-31-2010, 09:14 PM
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i drive mine like a truck. tows a lot, hard accel etc, minus the rad and hubs, shes going strong at 64k.
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Old 08-31-2010, 09:46 PM
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I switched my truck to pennzoil platinum to try and avoid the sludge issue. I bought the truck with 55,000 miles on it and have no idea about prior up keep. and had to replace a leaking radiator at 60,000 miles. and I now have a weird noise when turning from a stop in the front end.
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Old 08-31-2010, 10:17 PM
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hahaha wow they all go at 60k eh?
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Old 08-31-2010, 10:18 PM
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i got a wierd noise turning left and braking, now its getting louder under normal driving. its the wheel bearing hubs on my rig
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