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Re: 5.7L with a bad cam
[Re: V194]
#2302382
05/10/17 02:08 PM
05/10/17 02:08 PM
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Joined: Feb 2003
Posts: 18,582 Rust Belt, SW PA
Silver70
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 18,582
Rust Belt, SW PA
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Did they actually inspect the cam? I have lifters go bad on ones I've used, but never saw a bad cam.
68 Road Runner, 69 Belvedere, 71 Challenger Vert 340 barracuda, 01 Ram CTD, 95 Ram, 04 Ram, 85 Daytona turbo Z 66 GTO, 06 Magnum RT AWD. 07 Ram CTD, 07 Ram
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Re: 5.7L with a bad cam
[Re: V194]
#2302420
05/10/17 03:02 PM
05/10/17 03:02 PM
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Joined: Jan 2005
Posts: 12,415 Kalispell Mt.
HotRodDave
I Live Here
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I Live Here
Joined: Jan 2005
Posts: 12,415
Kalispell Mt.
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I have torn a few apart with bad cams lately and the bottom ends and stuff look new, even the two that had 300K miles.
The 392 cam is cheaper (I paid $68 from the dealer on the last one VS $177 for the 5.7 cam) and since the vave springs break anyhow on the 5.7 it would be a good idea to upgrade to the 392 springs. You get a way better cam for next to nothing when upgrading this way. Make sure to order the 392 automatic cam if you need MDS and 392 manual trans if you do not want MDS.
Honestly I think the cam goes bad because a roller quits rolling and starts sliding so replace the bad lifter and check all the others to make sure they roll real nice and smooth or if the cost is no concern get all 16 lifters new.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: 5.7L with a bad cam
[Re: HotRodDave]
#2302488
05/10/17 05:15 PM
05/10/17 05:15 PM
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Joined: Jan 2008
Posts: 4,254 Canada
WO23Coronet
master
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master
Joined: Jan 2008
Posts: 4,254
Canada
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How does the stock 5.7 tune do with a 6.4 cam? I've heard that a tune isn't necessary but really wakes them up if you get one. Noticeable power increase with a 6.4 cam?
Last edited by WO23Coronet; 05/10/17 05:16 PM.
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Re: 5.7L with a bad cam
[Re: V194]
#2302866
05/11/17 02:56 PM
05/11/17 02:56 PM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
pro stock
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pro stock
Joined: Jan 2006
Posts: 1,400
Trumbauersville PA
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"Honestly I think the cam goes bad because a roller quits rolling and starts sliding" The 2015 6.4 I picked up last week suffered from this, the roller on Intake No4 was stuck , wiped the cam lobe.
"How does the stock 5.7 tune do with a 6.4 cam? I've heard that a tune isn't necessary but really wakes them up if you get one. Noticeable power increase with a 6.4 cam?"
Wondering that myself.
Truth has no agenda, but those with an agenda make their own truth. Some of us are so open minded they only see their View
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Re: 5.7L with a bad cam
[Re: ric3xrt]
#2302876
05/11/17 03:07 PM
05/11/17 03:07 PM
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Joined: Jan 2008
Posts: 4,254 Canada
WO23Coronet
master
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master
Joined: Jan 2008
Posts: 4,254
Canada
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I've read it's a 50hp increase with a good custom tune in a 5.7. It sounds like HotRodDave has some first hand experience with 392 came in 5.7's so I was just wondering what his experience is and whether he got a tune
Which 6.4 did you get? An SRT or Big Gas Truck?
Last edited by WO23Coronet; 05/11/17 03:08 PM.
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