Re: 4.7 cylinder head question
[Re: Wyle E Coyote]
#2223038
12/29/16 11:29 PM
12/29/16 11:29 PM
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Joined: Dec 2010
Posts: 1,035 Missouri U.S.A.
71yelladustr
super stock
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super stock
Joined: Dec 2010
Posts: 1,035
Missouri U.S.A.
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I'd be looking for a worn cam lobe/ follower roller for the source of your noise rather than a bad lash adjuster. I've put a few cams in because of this issue. It is also sometimes the source of a random misfire as well.
Last edited by 71yelladustr; 12/29/16 11:34 PM.
392 gen III hemi on E-85 727 trans Dana 60 10.02@134
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Re: 4.7 cylinder head question
[Re: Wyle E Coyote]
#2223269
12/30/16 12:07 PM
12/30/16 12:07 PM
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Joined: Oct 2008
Posts: 96 Nampa, Idaho
Wyle E Coyote
OP
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OP
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Joined: Oct 2008
Posts: 96
Nampa, Idaho
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Yeah, I knew that I was taking a chance with a 4.7 when I got it. I had heard from many people that they're prone to oiling issues if you're not diligent about changing the oil and using quality oil and filters on them. It had 141k on it when I got it nearly a year ago, 151k now. It took a couple of months before I started getting the clattering sound. Then I noticed how quickly the oil got black. I was changing the filter every 500 miles or so for a while. The last couple of months it's taken over 1500 miles before the oil starts to change color, so I think I'm gaining on it. It otherwise runs great! And I get a combined 17mpg rather easily with it.
But I have been concerned about excessive wear. When I was talking with a friend about it, he reminded me of advice I've given out to others before; If I open it up and find excessive wear on the cam or rockers, new heads would be the best option. So instead of buying some of the parts and hoping for the best, I think I want to just replace the heads. And a new water pump and timing chains since I'm in there. But I don't want to fall victim to some shadetree shop with a flashy website selling dressed up used parts.
25 Dodge Roadster 66 D100 440/727 (on 72 D100 chassis) 67 W200 360/727 72 IH TravelAll 1110 4x4 345/727/NP205 76 Scout 2 360/727/D20 '08 Dakota SLT Quad Cab 4wd 4.7L
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Re: 4.7 cylinder head question
[Re: Wyle E Coyote]
#2223584
12/30/16 08:19 PM
12/30/16 08:19 PM
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Joined: Oct 2008
Posts: 96 Nampa, Idaho
Wyle E Coyote
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OP
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Joined: Oct 2008
Posts: 96
Nampa, Idaho
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A/MP: Thanks for the input. I'm thinking that this would be a good time to do the flushing, since the oil is staying clean much longer now. A final assault if you will. What would you recommend for the oils? I think the old Type F trans fluid was the highest detergent content, but I've not kept up on the newer blends. And I've been running 10w 30 or 40 depending upon ambient temps. But we're in a cold streak so I might go down to the 5W 20. Thoughts?
Dave: Are those timing chains a pain to do? This will be my first time digging into an OHC motor in many years. And in fact, I'm highly considering having my buddy do it. He has a good local repair shop. That way if something gets overlooked, it's not on me.
25 Dodge Roadster 66 D100 440/727 (on 72 D100 chassis) 67 W200 360/727 72 IH TravelAll 1110 4x4 345/727/NP205 76 Scout 2 360/727/D20 '08 Dakota SLT Quad Cab 4wd 4.7L
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Re: 4.7 cylinder head question
[Re: Wyle E Coyote]
#2223891
12/31/16 06:11 AM
12/31/16 06:11 AM
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Joined: Jan 2003
Posts: 27,421 Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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I did a fair amount of them when I worked at the Dodge dealer for 24 years. We had replaced a few heads under the powertrain warranty when valve seats came loose. Also would see some engines all sludged up real bad and of course they all said they changed their oil every 3000 miles as we recommended on that eng. But when replacing the chains it was nice to have the tool that holds all three chains in place on the idler gear in the block which is where the cam gear would normally be in a pushrod eng. We had the special tool in the tool kit the dealer gets for the 4.7 eng. I left the dealer in 2011 so its been a good 6 or more years since I replaced them but that one tool sticks in my mind as making the job easier. Maybe one of the guys who has done them lately will chime in on where they get the tool to hold the chains in place on the idler gear on what some call the dummy shaft. Ron
Last edited by 383man; 12/31/16 06:12 AM.
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