Does anyone know how to reduce or get rid of the dreaded hemi tick?
Depends on which tick you're talking about. Mine use to do it close to oil change which is when a lifter is not pumping up for 0 lash at start up. When you hear the tick only at start up and it goes away quickly it's definately an mds lifter malfunctioning. It's not going to be the same lifter every time, they take turns, lol! When oil pressure builds up the ticking goes away in this case. Chrysler won't aknowledge this but these mds lifter designs have flaws according to various engine builders. In my case with mds lifters a change to 6.1 lifters is supposed to be a fix so they say, another is a high volume oil pump. I don't see how the high volume oil pump will help if the lifter is bleeding down because of mds malfuntions. It's going to bleed down over night no matter how good of an oil pump you have. I don't know, maybe the high volume pump will pump the malfuntioning lifters up fast enough to not cause ticking. For my next oil change coming up I'm going to try 5W-30 to see if it helps. They say it will interfere with mds but mine is disabled anyway and I don't ever plan on enabling it anymore. If it's a tick you hear all the time there is no easy fix other than changing your lifters to after market or buying 1500 dollar adjustable rocker arms to acheive true 0 lash. Everyday ticking is caused by having too much valve lash, either from cheap or worn out lifters or even from worn rocker tips. That's what makes adjustables so sweet. And don't let anyone ever tell you that you can't use adjustable rockers if you have hydraulic lifters because you can. They are not just for solid lifters and cams, you can use them for both. Hydraulics have 0 lash and solids have different settings for cold and hot. If you don't have mds and your warranty is expired you should try a higher weight oil. The new 392 SRT8's use 5W-40 so I don't see why you couldn't try that especially with high a mileage motor. Like I said, I'm trying 5W-30 in about 500 miles to see if it helps with mine. I haven't heard the cold start ticking yet but I'm sure it's coming, lol! edit: Btw, this will be my first oil change since disabling mds. There's a good chance that I won't hear the ticking because I haven't used mds in a while. Maybe...just maybe I've got the pcm fooled into leaving all four mds cylinders/eight lifters to where they stay pumped up enough even when the oil looses it vicosity. Thinner oil will drain down from the lifters faster (my reason for trying heavier weight oil). Just as thinner oil flows though the enigine more freely, maybe we have a not so stong of oil an pump from the factory to accomodate the thin 5W-20 oil. Which explains why builders say a high volume pump will help solve the ticking, who knows?Does anyone know how to reduce or get rid of the dreaded hemi tick?
I'm not sure if it's in your budget but maybe you should try a high volume pump then. And thanks for the warning in advance. I guess the 5W-30 is not going to work for me either then. It sure does sound like a case of oil loosing it's viscosity in my case since it does it close to oil change only. I'm sure that after a while the mds lifters will wear enough to do it in more frequent start ups. I'm not looking forward to that one, I hope to have this motor changed out long before that happens.i use 5w - 30 and still have the tick at startup.. Love to get rid of it but learned to live with it..
I have/had the Hemi tick on all my Rams. The 04 and 08 were 2500 HD Rams, so no MDS. The ticked louder than my current Ram with MDS lifters. I've only come across 2 Hemis that did not tick, and both ended up in the shop for major engine work. Both ticked after that....and proved to be very reliable.
I like the tick.....to me it means 'Healthy Motor'.
Could it be that you swapped out the lifters as the reason or did you swap them out as well? Higher cam specs do not warrant longer push rods. I would think that if your new push rods are longer its because of a shorter plunger valve in the new lifters. If you used the same lifters it would be next to impossible to keep the engine running with longer than spec push rods...valve lash would be too tight. I know that Gen 111 Hemis do not have adjustable rockers from the factory. That said, if you were using adjustables the engine would try to die at idle when you over tighten just one rocker. (you're bringing the engine to it's knees) To adjust hydraulic rockers you loosen them till they start tapping then you tighten them back down till they stop, then you back them off a 1/4 turn. If you tighten them a 1/4 instead of loosening them a 1/4 the engine would most likely die before you got past your second rocker. So my guess for the longer pushrods is because of the shorter plunger or lifter height otherwise longer pushrods would not work. I'm not trying to be a tech a$$ here, I'm just trying to figure out (in my mind, not yours because you may have a different opp) if the change of lifters were the main reason for your ticking to go away. According to every peputable engine builder I've spoken with, the poorly designed 5.7 mds lifters are the reason for the ticking. Thanks for listening, Jerry.I got rid of mine when I swapped out the cam. I believe the longer 6.1 pushrods did the trick.