Hemi tick cause and cure, possibly solved
#2973129
10/11/21 07:55 PM
10/11/21 07:55 PM
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Joined: Nov 2003
Posts: 2,937 GA
roadrunninMark
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Was watching this video on youtube. Guy believes tick is caused by low oil pressure at low rpm. Tick is the lifter smacking against lobe as it slowly destroys itself and the lobe. Cure is said to upgrade to a high volume oil pump, as a hellcat oil pump or aftermarket. This increases your low rpm oil pressure. You probably have to still change out lifters and maybe cam, depending on how bad/ long its been ticking. Here is the video…. https://www.youtube.com/watch?v=jkNOXWGXADMPart number for hellcat pump is down in comments section. Hope this helps fixing some ticking hemis.
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Re: Hemi tick cause and cure, possibly solved
[Re: HotRodDave]
#2973921
10/13/21 12:58 PM
10/13/21 12:58 PM
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Joined: Nov 2003
Posts: 2,937 GA
roadrunninMark
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they have the same oil pressure as earlier engines that did not have this problem. The factory fix was larger needle bearings in the roller tip and in my experience it seems to have been the cure. Yes he talks about that in the video. He believes it is the coating process or something like that of the newer engines cams compared to the earlier versions. The earlier engines don’t have mds either. I don’t have a new hemi but wanted to share this. It is cheaper and easier to upgrade the oil pump then replacing cam and lifters.
Last edited by roadrunninMark; 10/13/21 01:02 PM.
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Re: Hemi tick cause and cure, possibly solved
[Re: HotRodDave]
#2973936
10/13/21 01:47 PM
10/13/21 01:47 PM
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Joined: Jan 2011
Posts: 15,827 Central Florida
larrymopar360
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I do believe Dave is correct in that it's NOT an MDS issue and that this has been proven because it reared it's ugly head after the Eagle Heads came into play and MDS was present before this. I still don't see any definitive explanation because I've seen some issues on post 17 engines.
Facts are stubborn things.
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Re: Hemi tick cause and cure, possibly solved
[Re: 5thAve]
#2974419
10/14/21 07:49 PM
10/14/21 07:49 PM
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Joined: Jan 2005
Posts: 12,419 Kalispell Mt.
HotRodDave
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It's probably a mix of things like an oiling problem or something that causes the lifters to not move up and down in their bores as easily as they should and weak bearings in them that can't take the added force when that happens. There's very little friction between roller lifters and cam and it seems that this has only become more of a problem with newer engines. Don't forget GM v8s also have the same sort of problems and also started around the same time.
Even with older roller cam engines you can open one up that had engine failure from oil starvation and the cam and lifters look perfectly fine.
There are also posts kicking around other forums, usually by the same small number of people it seems, that blame the failures on lack of friction because of certain oils which cause the roller to not roll on the cam. Seems to me if the lifters not rolling due to no friction between roller and cam I would not expect to see bad bearings in a lifter but still have the cam be perfectly fine. I have seen plenty of lifters that have a bad bearing, usually several in a set when one has totally gone bad (you can clearly hear it when rolling it on clean glass) but the cam is still perfectly fine on those lobes. Maybe the needle bearing is not rolling because of the lack of friction and going bad inside the wheel, then it eventually stops rolling and THEN the lifter eats the cam. Even if this is the case it looks to me that the larger needles solved this.
I am not causing global warming, I am just trying to hold off a impending Ice Age!
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Re: Hemi tick cause and cure, possibly solved
[Re: roadrunninMark]
#2974921
10/16/21 11:27 AM
10/16/21 11:27 AM
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Joined: Jan 2011
Posts: 15,827 Central Florida
larrymopar360
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OK, here is a guess. Maybe the additional lift of the cams put too much stress on the needle bearings and caused them to wear instead of spin? That would go with your idea that larger needle bearing are stronger and have more surface area to spread the additional load. There are some videos suggesting the stiffer valve springs in the 09 and above Eagle Heads contributed.
Facts are stubborn things.
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Re: Hemi tick cause and cure, possibly solved
[Re: GarageDodge]
#2975226
10/17/21 07:37 AM
10/17/21 07:37 AM
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Joined: Jan 2003
Posts: 8,021 Tulsa OK
Bad340fish
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How much of these failures would you pin on the longer oil change intervals of today? My wife has an 18 Durango R/T so I am assuming it has the later lifters. Most of her driving is in town and she doesn't cover tons of miles. The dealer changes the oil for $20 since we bought it there so I change it when the oil life indicator shows 50%.
Its got 53K miles on it and will clatter sometimes on startup, usually after being moved a short distance then shut off again. I have heard it tick before but never after driving. We have 7K of powertrain warranty left and another couple of years of Maxcare warranty as well. I need to take it in and get the trans service done soon so I might mention the occasional clatter to them just to have it on record.
68 Barracuda Formula S 340
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Re: Hemi tick cause and cure, possibly solved
[Re: Bad340fish]
#2975292
10/17/21 11:43 AM
10/17/21 11:43 AM
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Joined: Jan 2011
Posts: 15,827 Central Florida
larrymopar360
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How much of these failures would you pin on the longer oil change intervals of today? My wife has an 18 Durango R/T so I am assuming it has the later lifters. Most of her driving is in town and she doesn't cover tons of miles. The dealer changes the oil for $20 since we bought it there so I change it when the oil life indicator shows 50%.
Its got 53K miles on it and will clatter sometimes on startup, usually after being moved a short distance then shut off again. I have heard it tick before but never after driving. We have 7K of powertrain warranty left and another couple of years of Maxcare warranty as well. I need to take it in and get the trans service done soon so I might mention the occasional clatter to them just to have it on record. You are the very FIRST person I've seen mention the "usually after being moved a short distance then shut off again". !!! I've notice this in several 5.7 cars. Strange because I cannot come up with a logical reason as to why. Not at first start to move around parking lot, but at the second start short time later. The lifters would be more fully drained down on the first start. I don't get it.
Facts are stubborn things.
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Re: Hemi tick cause and cure, possibly solved
[Re: Bad340fish]
#2976395
10/20/21 08:26 AM
10/20/21 08:26 AM
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Joined: Jan 2003
Posts: 554 Mesa , Az
Jambbii
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mopar
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How much of these failures would you pin on the longer oil change intervals of today? My wife has an 18 Durango R/T so I am assuming it has the later lifters. Most of her driving is in town and she doesn't cover tons of miles. The dealer changes the oil for $20 since we bought it there so I change it when the oil life indicator shows 50%.
Its got 53K miles on it and will clatter sometimes on startup, usually after being moved a short distance then shut off again. I have heard it tick before but never after driving. We have 7K of powertrain warranty left and another couple of years of Maxcare warranty as well. I need to take it in and get the trans service done soon so I might mention the occasional clatter to them just to have it on record. My 6.4 does this in my ram as well if started up cold and moved a very short distance ( like in and out of the driveway). Sounds like lifters are just getting pumped up. Our 12 Durango doesn't do this but it uses thicker oil. That being said when I did the cam swap it had a lob that looks like it was loosing some of the "coating" at 80k when I pulled it. Rollers were fine but I upgrade to the thicker needle bearing ones.
70 Challenger 1960 Town Wagon P Pump 24v cummins project 06 Mega 3500 Drw 2wd 12 Durango R/T 18 Power Wagon 67 A100
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