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gen1dak
Dodge Dakota
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7/13/2007
18:47:40
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 Subject: RE: Which motors...?
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Wrong again. 2008 has some improvements, but they're not DOHC. Again, from AllPar. Notice that these are specs common to both generations of 4.7 engine. Pay special attention to the Valve System.
Common to both generations:
* Type and Description: V-type, liquid-cooled
* Displacement: 287 cu. in. (4701 cu. cm)
* Bore x Stroke: 3.66 x 3.40 (93.0 x 86.5)
* Valve System: Chain driven, SOHC, 16 valves, hydraulic end-pivot roller rockers
* Fuel Injection: Sequential, multi-port, electronic, returnless
* Construction: Compacted Graphite Iron bedplate, cast-iron block, aluminum alloy heads
* Fuel Requirement: E85 (Ethanol) or Unleaded regular, 87 octane (R+M)/2
* Oil Capacity: 6 qt. (5.7L)
* Emission Controls: Dual three-way catalytic converters, heated oxygen sensors, and internal engine features
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yeah.
Dodge Dakota
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7/14/2007
01:46:57
| RE: Which motors...?
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Yeah, they have not even made a motor yet. It wont be until '09 or '10 before we see VVT and DOHC.
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jjj
Dodge Dakota
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7/14/2007
10:37:02
| RE: Which motors...?
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The 4.7 seems to be fairly durable with a superior trans..
That being said it just doesn't tow as well as the 5.2 or 5.9 - it will tow and has the power but it has to rev to do it.
How do I know?
I have a 5.9 01 QC dak, dad has a 4.7 QC 02 dak, brother HAD a 99 5.2 durango and now has a 05 4.7 durango - we all agree.
My brother and me just made a trip to FL towing our boats - my 01 pulling a heavier load got about 20% better gas mileage than his 05 Durango. He also complained it just didn't have the power of his 99 UNLESS you rev it.
I will admit my dads 02 has been completely trouble free - other than brakes of course :)
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Kowalski
GenIII
7/14/2007
11:01:08
| RE: Which motors...?
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So, what's wrong with letting the 4.7 rev ? It loves to rev and has a higher redline than the other motors - so don't be afraid of that. I notice you have left out the gear ratios in this comparison; that may have more to do with the differences you note than the motors. Mine tows quite well with a 5500 lb camper. None of my friends, even with v10 or diesel power, have been able to outpull me with their campers.
Lead, follow, or get out of the way
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jjj
Dodge Dakota
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7/14/2007
19:21:41
| RE: Which motors...?
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All 3.55 geared and 4X4, nothing wrong with letting it rev..
I even said it has the power just loves to rev to do it - just giving real world comparisons.
Just takes some getting used too as far as revving, since most of the older motors weren't known for that :)
And my 01 5.9 isn't totally stock, very close but finely tweaked - it has a cat back (absolutely no gain) and 1.7 RR's, other than that some fine tuning.
The 4.7 is a fine motor and has proven itself very well IMO - from day one!
The 2.7 can't claim that LOL.
My Dads 4.7 is a freak on mpg though, almost identical to mine except the eng. package and one year - he get 15+ in town and 21 or so on the highway - I can't touch those number :(
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Kowalski
GenIII
7/15/2007
09:06:26
| RE: Which motors...?
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That seems to be all there is to it when people claim the 4.7 doesn't tow as well - just need to let it rev. It was designed for higher rpms - lighter pistons and connecting rods, and a more stable (as well as lighter) valve train. No pushrod deflection in a 4.7; people commonly upgrade to a stronger pushrod in performance build ups of the other engines. The 4.7 should become more accepted as people learn to understand it better.
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jayb
Dodge Dakota
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7/15/2007
10:44:50
| RE: Which motors...?
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the problem with letting it rev is after a little while it runs hotter and wears down the engine faster. i like towing with the engine at low rpms.
Also, outside of the annoying ways the 46RH shifts, it handles a beating quite well i say. its not till they went 46RE that it had real problems.
i dont have any beef against the 4.7, but i do notice alot, when someone says they had a bad experience, and if you read up it does happen often, the 4.7 lovers around here jump on you like flies on sh!t. To me, it seems like they just dont want to hear it.
i havent had a bad experience, but from what i hear, toyota tundra is the way to go. everyone i know that has one hasnt had 1 thing go wrong. no 02 sensors at 20,000 miles, no crappy breaks, no poor suspension design, no horrible gas mileage, no electrical gremlins, no transmission problems(all dak/ram traits). plus the motor is bullet proof, as its the lexus design. i know mechanics at nissan, toyota, and dodge. the tundra just doesnt come in nearly as much. i look foward to all the flaming im expecting.
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gen1dak
Dodge Dakota
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7/15/2007
14:31:28
| RE: Which motors...?
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Looks like some of the towing/rev issue is being addressed with the second generation 4.7 as it has improved torque figures (as well as HP). 'Course, the best way to fatten up the low end is, ahem, a bump in displacement. Probably won't happen, though. At 290hp, any more improvements would put it a bit too close to the 5.7 Hemi, unless they are planning further power bumps for it as well.
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jayb
Dodge Dakota
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7/15/2007
18:48:14
| RE: Which motors...?
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i wanna see the mileage figures for this. probably wont be too bad but i bet you have to run premium in it now.
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gen1dak
Dodge Dakota
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7/15/2007
20:07:26
| RE: Which motors...?
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At the top of the page in reference to commonalities between 1st and 2nd generation 4.7's......
* Fuel Requirement: E85 (Ethanol) or Unleaded regular, 87 octane (R+M)/2
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Kowalski
GenIII
7/16/2007
18:53:16
| RE: Which motors...?
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Jayb - I don't know where you got the idea the 4.7 runs hotter if you rev it towing ? My 7 year old truck runs the same temp on the gauge whether I'm flogging it pulling 5500 lbs, or just running easy and empty. Not one bit hotter. The 4.7 really doesn't have that many problems, you won't find more here than for a 5.2 - and that's why many post here - just when they have problems. Are you really that threatened by the new technology ? With tighter tolerances, I believe the 4.7 will wear better than the looser 5.2's.
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gen1dak
Dodge Dakota
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7/16/2007
19:45:17
| RE: Which motors...?
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On the issue of problems, seems like most of the problems for either engine aren't the engine themselves, rather the electronics, or some bolt-on part. The engine longblocks themselves don't usually have an issue.
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jayb
Dodge Dakota
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7/16/2007
23:49:38
| RE: Which motors...?
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kowalski
Well, I have read of alot of peoblems with newer dakotas, yes mostly other parts than the engine but I have read and heard of plenty on instances in which there was engine issues.
Why would i be threatened by newer technology? Thats something that someone with no life would say. It sounds to me like your "threatened" by someone saying their truck is better than yours, not to say mine is, but jesus, you make it sound like we are comparing dicks here.
The 4.7 may last longer than the 5.2, but i personally doubt it.
Either way i dont care nearly enough about either engine to waste my time fighting about whose engine is better. All I care about is knowing that most likely my truck will start tomorrow with 139,000 on it, and could last another 100k or more if i decided to keep it that long.
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1hotkadota
Dodge Dakota
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7/17/2007
16:13:26
| RE: Which motors...?
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Hey Gen1,
* Valve System: Chain driven, SOHC, 16 valves, hydraulic end-pivot roller rockers
Its seems your info is wrong too. While the '08 4.7 might not be DOHC, it does have 3 valves with a new lash adjustment system.
I've got 123,000 miles on my 4.7 with no problems and a few mods including HO cams and a daily flogging by my right foot.
I guess the only argument favoring the 4.7 now is that it gets better gas mileage and makes more power per cubic inch. That means its more efficient.
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Kowalski
GenIII
7/17/2007
17:02:06
|  RE: Which motors...?
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Jayb - not threatened at all, just a little annoyed that you are bashing a motor you don't seem to have much experience with. If I start bashing the 5.2 unfairly, fell free to call me on it too. See the difference ? I'm not here to discuss anatomy with you...
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jayb
Dodge Dakota
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7/17/2007
18:05:37
| RE: Which motors...?
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I'm not bashing the 4.7. I just stated things I hear.
Maybe your truck does have no problems, so in your eyes its the best thing ever, and thats good too.
If you started bashing the 5.2, I could care less.
I'm here to discuss facts and answer questions, not bash anything.
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Kowalski
GenIII
7/17/2007
18:49:24
|  RE: Which motors...?
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Then you might want to consider if you heard of a 4.7 running hotter when towing, my experience would indicate it was a problem with the cooling system rather than the motor. Sounds like we're both here for the same thing. I don't believe its the best thing ever though; I think Toyota may have all Mopar v8's pretty handily beat right now...
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jayb
Dodge Dakota
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7/17/2007
20:47:33
| RE: Which motors...?
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what i like about toyota's tundra is that i know its a good, capable truck and at the same time, it doesnt really have any common problems.
not to mention when i sat in one, it just seemed perfect. everything was designed right.
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gen1dak
Dodge Dakota
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7/17/2007
23:47:40
| RE: Which motors...?
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Looks like they have problems too. Brakes. Ball joints........
http://townhall-talk.edmunds.com/direct/view/.ef04ac5/
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jjj
Dodge Dakota
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7/19/2007
16:39:42
| RE: Which motors...?
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Toyota has good hype. A decent vehicle but certainly not all that it is hyped up to.
They led the nation in recalls last year!
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