Re: 5.7 hemi rods
[Re: HotRodDave]
#1636036
06/20/14 04:40 PM
06/20/14 04:40 PM
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Joined: Jun 2003
Posts: 9,225
Charleston
sixpackgut
Drag Week Mod Champion
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Drag Week Mod Champion
Joined: Jun 2003
Posts: 9,225
Charleston
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Interestingly, dodge is using the same rods in the hellcat motor. Basically the same rods that go well over 1000 hp in the many stock block ls turbo combos
Gen 3 power 6.22@110, 9.85@135
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performance only racing, CRT, ultimate converter, superior design concepts, ThumperCarbs
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Re: 5.7 hemi rods
[Re: HotRodDave]
#1636037
06/20/14 04:41 PM
06/20/14 04:41 PM
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
AlexP
I Live Here
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I Live Here
Joined: Sep 2003
Posts: 10,645
Houston, Tx
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Quote:
Any drop in replacements that don't break like the stock ones? I am looking for one that don't require balancing but don't break like the powdered metal.
Only drop in parts are pistons and rods for the 6.1 and 6.4.
It takes about 500rwhp to brake a 5.7 PM rod. You can't make that kind of power with a head and cam 5.7, so connecting rod failure isn't a problem.
I wouldn't worry about it, they aren't in danger.
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Re: 5.7 hemi rods
[Re: HotRodDave]
#1636039
06/20/14 10:37 PM
06/20/14 10:37 PM
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Joined: Sep 2003
Posts: 10,645
Houston, Tx
AlexP
I Live Here
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I Live Here
Joined: Sep 2003
Posts: 10,645
Houston, Tx
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Quote:
Quote:
Quote:
Any drop in replacements that don't break like the stock ones? I am looking for one that don't require balancing but don't break like the powdered metal.
Only drop in parts are pistons and rods for the 6.1 and 6.4.
It takes about 500rwhp to brake a 5.7 PM rod. You can't make that kind of power with a head and cam 5.7, so connecting rod failure isn't a problem.
I wouldn't worry about it, they aren't in danger.
I have 3 short blocks in my shop right now with broke rods, all 3 are stock motors, 2 from durangos and one from a ram. The big end of the rod is still on the cranks and turn silky smooth. 2 blocks are hurt and one is not. I own a repair shop and we see this failure being fairly common.
I built and raced those motors from 2006 onward. I've never seen a 5.7 break, even deep into the 11's. I've need broken pistons around the ringlands, but never an actual rod failure.
Did all of these motors have dark oil stains on them?
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Re: 5.7 hemi rods
[Re: AlexP]
#1636040
06/21/14 12:46 PM
06/21/14 12:46 PM
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Joined: Nov 2004
Posts: 3,544
Syracuse,NY
CompWedgeEngines
master
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master
Joined: Nov 2004
Posts: 3,544
Syracuse,NY
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Quote:
Quote:
Quote:
Quote:
Any drop in replacements that don't break like the stock ones? I am looking for one that don't require balancing but don't break like the powdered metal.
Only drop in parts are pistons and rods for the 6.1 and 6.4.
It takes about 500rwhp to brake a 5.7 PM rod. You can't make that kind of power with a head and cam 5.7, so connecting rod failure isn't a problem.
I wouldn't worry about it, they aren't in danger.
I have 3 short blocks in my shop right now with broke rods, all 3 are stock motors, 2 from durangos and one from a ram. The big end of the rod is still on the cranks and turn silky smooth. 2 blocks are hurt and one is not. I own a repair shop and we see this failure being fairly common.
I built and raced those motors from 2006 onward. I've never seen a 5.7 break, even deep into the 11's. I've need broken pistons around the ringlands, but never an actual rod failure.
Did all of these motors have dark oil stains on them?
I have a 5.7 here out of a truck, rod broke, hole in block. I would feel say in saying it was lack of servce maintenance and oil changes on this one. The rod started knocking, customer changed the oil like everyone does once its too late, and boom. The oil staining os obvious.
RIP Monte Smith
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WD for Diamond Pistons,Sidewinder cylinder heads, Wiseco, K1 rods and cranks,BAM lifters, Morel lifters, Molnar Technologies, Harland Sharp, Pro Gear, Cometic, King Engine Bearings and many others.
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Re: 5.7 hemi rods
[Re: CompWedgeEngines]
#1636041
06/21/14 02:38 PM
06/21/14 02:38 PM
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Joined: Jul 2009
Posts: 33
Calgary, Alberta
Turbo392
member
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member
Joined: Jul 2009
Posts: 33
Calgary, Alberta
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I've seen several rods let go after slugging water. That's it. The stock intake manifolds cannot pass water slowly, it's all or none.
2003 Dodge Ram 1500
Turbo / Meth Injected 6.4L Hemi (392)
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Re: 5.7 hemi rods
[Re: HotRodDave]
#1636042
06/22/14 11:17 PM
06/22/14 11:17 PM
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Joined: Dec 2013
Posts: 198
Stinnett, Tx
rumblebee4232
member
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member
Joined: Dec 2013
Posts: 198
Stinnett, Tx
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Quote:
Quote:
Quote:
Any drop in replacements that don't break like the stock ones? I am looking for one that don't require balancing but don't break like the powdered metal.
Only drop in parts are pistons and rods for the 6.1 and 6.4.
It takes about 500rwhp to brake a 5.7 PM rod. You can't make that kind of power with a head and cam 5.7, so connecting rod failure isn't a problem.
I wouldn't worry about it, they aren't in danger.
I have 3 short blocks in my shop right now with broke rods, all 3 are stock motors, 2 from durangos and one from a ram. The big end of the rod is still on the cranks and turn silky smooth. 2 blocks are hurt and one is not. I own a repair shop and we see this failure being fairly common.
I am with HOTRODDAVE on this.. I have seen several of the 5.7's with the rod broke in the middle..The first one I saw like that was from a 2004 Durango with 95000 miles.. I swapped in a 36000 mile 2005 in its place then decided I wanted to build the 5.7 for a a race car so I started pulling it apart.. when I pulled the oil pan off a piece of the block fell out looked further and saw that the rod was broke in the middle.. the journal was/ is in perfect condition and the rod bearing is in good runnable condition.. The lady was in the last 15 minutes of a three hour trip from Dalhart Tx to Childress Tx..I started looking for another block to use for my build and found three more that had the same exact failure before I found a good block..I personally would not use stock rods in any build/rebuild but that is my choice..
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Re: 5.7 hemi rods
[Re: HotRodDave]
#1636046
06/23/14 07:29 PM
06/23/14 07:29 PM
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Joined: Feb 2011
Posts: 4,302
Nebraska
72Swinger
master
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master
Joined: Feb 2011
Posts: 4,302
Nebraska
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I would say it got hydroed, or it was a defective rod. BTW I have some 6.1 rods ill sell ya if it makes ya feel better lol!
Mopar to the bone!!!
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Re: 5.7 hemi rods
[Re: 72Swinger]
#1636047
06/23/14 10:41 PM
06/23/14 10:41 PM
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Joined: Dec 2013
Posts: 198
Stinnett, Tx
rumblebee4232
member
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member
Joined: Dec 2013
Posts: 198
Stinnett, Tx
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Quote:
I would say it got hydroed, or it was a defective rod. BTW I have some 6.1 rods ill sell ya if it makes ya feel better lol!
I think they are all defective.. the ones I seen broke moved freely at both ends no reason for them to be broke other being defective.. anytime I rebuild one of these engines it will get a new set of forged rods definitely will not reassemble one with the stock rods if my money is paying for it.
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Re: 5.7 hemi rods
[Re: rumblebee4232]
#1636048
06/24/14 11:47 AM
06/24/14 11:47 AM
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Joined: Oct 2003
Posts: 387
Almont, MI.
gdemon
enthusiast
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enthusiast
Joined: Oct 2003
Posts: 387
Almont, MI.
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Most 2004-2005 Durangos fail from hydro lock. They have a bad design cowl top. This was fixed in 2006. If the drain gets plugged of if its a real heavy rain it floods the motor. And at about 100000 miles the intake gaskets dry out and they start sucking water. First clue is a misfire in a car wash most think its bad wires but its most likely the intake. I just bought my 6th one . But them for 1000-1500 put in a piston and rod and sell for 4000.
69 Barracuda
70 Cuda
70 Cuda
70 Cuda Conv.
70 T/A Challenger
70 Sport Fury GT
71 Demon 5.7 Hemi
72 Demon
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