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Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: OVERKILL] #4720779 04/08/18 05:36 PM
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SOHCman Offline
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OVERKILL, is that a stock roller lifter from a 302? What milage did that happen at, or was this a performance engine?


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Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: das_peikko] #4721202 04/09/18 06:29 AM
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SubieRubyRoo Offline
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392 Cam

Gotta be SADI at $80. Looking at some of the cam pics it is weird though.. the way it's really only eating the ramps makes me wonder if part of the issue is insufficient valvespring pressure, and the lifter is bouncing on the lobe. That would definitely lead to busting some needles and therefore locking up the roller, then digesting the cam lobe first?


De omnibus dubitandum.
Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: SOHCman] #4721255 04/09/18 08:03 AM
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Originally Posted By: SOHCman
OVERKILL, is that a stock roller lifter from a 302? What milage did that happen at, or was this a performance engine?


That's an aftermarket stock-style roller lifter from a 302. This was a built engine, which came in a car my buddy purchased, had less than 1,000Km on it. We reused quite a few parts from it including the heads. We did, temporarily, reuse that camshaft too, since it survived surprisingly well. It was eventually replaced by a re-grind of the same profile, however it never sounded the same so the re-grind was not an exact copy.


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Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: SubieRubyRoo] #4721256 04/09/18 08:03 AM
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OVERKILL Offline
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Originally Posted By: SubieRubyRoo
392 Cam

Gotta be SADI at $80. Looking at some of the cam pics it is weird though.. the way it's really only eating the ramps makes me wonder if part of the issue is insufficient valvespring pressure, and the lifter is bouncing on the lobe. That would definitely lead to busting some needles and therefore locking up the roller, then digesting the cam lobe first?


That's a strong case for them both being SADI (that price) and subsequently the only difference being the oil spec.


2019 RAM 1500 Sport - Mobil 1 EP 0w-20, FRAM Ultra
2020 Grand Cherokee SRT - Ravenol SSL 0w-40, FRAM Ultra
Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: das_peikko] #4861555 09/06/18 03:32 PM
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I read an article on this in Machinery Lubrication and they stated the cause was because they were cast in the 5.7l engine and were forged steel in the 6.4l engines

Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: blakegeo] #5160402 07/14/19 11:50 AM
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Originally Posted by blakegeo
I read an article on this in Machinery Lubrication and they stated the cause was because they were cast in the 5.7l engine and were forged steel in the 6.4l engines




I know this was from last year. Don't think for a second the 6.4 doesn't have lifter failures. I see it weekly on the Jeep and Durango SRT groups. No difference between the 5.7 and 6.4. I've had a 14 Jeep SRT and now an 18 Durango SRT myself. That dealer is full of it.

Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: das_peikko] #5174007 07/29/19 03:40 PM
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earthbound Offline
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so knowing this issue is out there...do you guys recommend sticking with the 5w20 mfg spec or will a thicker oil ie: 5w30 redline that supposedly works wonders in quieting down the tick work better. I would love to know if using a certain oil spec would prevent me down the line from having lifter failure issues.


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Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: das_peikko] #5267465 11/14/19 07:56 PM
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One thing have learned from following posts on bitog over the years is that exemplary engineering can overcome poor quality oil, but the “best” synthetic oils can never fully overcome engineering deficits.


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Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: das_peikko] #5267633 11/14/19 10:50 PM
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mattd Online Content
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This happened to a maxxforce DT with about 4000 hours on a “repaired” camshaft that they chose to cut costs on and paid for the repair twice. This shows the importance of camshaft hardness.

15169E5E-E807-44D4-B503-A561DC42DFD6.jpeg13B9F36E-66BA-40CA-A9A4-9EF48B9B1751.jpeg22032D9C-4BB4-48B9-8F6C-973612E789F6.jpeg09352903-0518-4590-98BE-84F82BBEAEA4.jpeg5FC5FD63-6AAA-4187-A6C9-9AB31F7DD2D5.jpeg5A1CF2E5-AFED-4BD7-93AE-1B06AE4609D6.jpeg

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Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: spiderbypass] #5267702 11/15/19 12:36 AM
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Originally Posted by spiderbypass
One thing have learned from following posts on bitog over the years is that exemplary engineering can overcome poor quality oil, but the “best” synthetic oils can never fully overcome engineering deficits.



I think the problems were those of metallurgy and lack of proper heat treatment (hardening).

Last edited by MolaKule; 11/15/19 12:38 AM.

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Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: mattd] #5267813 11/15/19 07:47 AM
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Originally Posted by mattd
This happened to a maxxforce DT with about 4000 hours on a “repaired” camshaft that they chose to cut costs on and paid for the repair twice. This shows the importance of camshaft hardness.


That rough turn between the lobes, looks like 250 finish! crzy I assume they’re induction hardened as well? How do you “fix” that??

Last edited by Skippy722; 11/15/19 07:55 AM.

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Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: Skippy722] #5268071 11/15/19 12:29 PM
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They had the original one fixed (the one pictured). The lifter retainer spun on the cam and destroyed it. I overhauled the engine out of chassis and put the original cam that was repaired back in. 10 months later are the photos in my previous post. Bought a new cam from the dealer and it has been fine since.

This is the picture of the lifter after the dog bone broke

04F223D8-084D-404A-B1E0-8077562608A6.jpegC9DBF94F-58CA-4713-8DC9-9485285EF3FB.jpeg
Last edited by mattd; 11/15/19 12:38 PM.

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Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: das_peikko] #5272067 11/19/19 07:41 PM
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You would think by now FCA would have a more robust cam. How long has it has it been, ten years?

Re: Camshaft and Lifter Wear on Chrysler Hemi Engines [Re: earthbound] #5272337 11/20/19 08:12 AM
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Originally Posted by earthbound
so knowing this issue is out there...do you guys recommend sticking with the 5w20 mfg spec or will a thicker oil ie: 5w30 redline that supposedly works wonders in quieting down the tick work better. I would love to know if using a certain oil spec would prevent me down the line from having lifter failure issues.


https://www.schaeffler.com/remoteme...fler_2/tpi/downloads_8/tpi_176_de_en.pdf

As always, the property of oil that lubricates is viscosity. Lack of sufficient viscosity is a HUGE factor in roller bearing life. It's not unusual for insufficient viscosity to reduce roller bearing life by an order of magnitude.

Whether viscosity solves this problem or not is another matter entirely. As poor component quality or an insufficiently robust design probably won't be "fixed" by oil viscosity.

https://www.chargerforums.com/threads/answers-5-7l-hemi-camshaft-professional-failure-assay.382357/

https://www.bobistheoilguy.com/forums/ubbthreads.php/topics/4499405/all/Molybdenum,_Cam_wear_and_Hemi_


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