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HEMI tick

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Freeze

Posted: Sunday, March 23, 2008 11:43:30 PM

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Joined: 1/20/2008
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Location: Virginia Beach, VA

Yes, I'm referring to the infamous HEMI tick. One of the theories floated on Dodge Talk involves inadequate oiling of the left rear lifters. Since the tick on mine has gotten really loud lately, despite a fill of AMSOIL 0W-30 last week, I've been under my truck quite a bit and have narrowed the source down to the lower rear end, emphasis on the left/driver's side (at least that's where it's loudest). All I know is that it is a single event per crankshaft revolution, so if it is a lifter issue, it's a single lifter that's jacked up. This is no exhaust leak, it's metal-to-metal contact, and it sounds like the dull, hollow "tack" of aluminum. My engine is running great, thanks to a set of new Champion Iridiums (no more idle surging, CEL's, or misfire codes), but it sounds like sh*t. The "tack-tack-tack" sounds like a sprinkler on the rapid return arc. It's so loud it overpowers the exhaust rumble. It's f*cking embarrassing, and I'm not happy.

So, I gotta ask: any 5.7 or 6.1 stroker motors having this problem? Cam/springs/head swaps don't seem to diminish the sound, only increase it. Since its frequency is directly related to RPM (1:1 ratio), I'm trying to eliminate all the other parts/variables/possibilities. Crankshaft position sensor? Toner ring? I'm going f*cking batsh*t here! Brick wall

'03 Black SLT QC SWB 4x4 Off-Road -- Rough Country X-Lift - Custom Deaver leafs w/ 4" lift - Bilstein 5100's all around - 35 x 12.50 DC FCII's on 17 x 9 Centerline Dorsals -- AirAid Intake System w/ AMSOIL synthetic filter -- Comp 260 cam -- Manley springs, retainers -- Stu's custom pushrods -- JBA Cat-4ward mids -- Borla cat-back -- Superchips -- Mark VIII e-fan w/ FK-60 -- Red 8.2mm Taylor Thundervolts -- Roll-n-Lock tonneau -- bunch of other stuff

TheBossHEMI

Posted: Monday, March 24, 2008 5:43:18 PM

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Yup, mine's been getting worse as well.

Freeze

Posted: Friday, September 05, 2008 11:55:50 PM

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Location: Virginia Beach, VA

Well, it would appear that Gadier (AKA PlatinumHemi/383Hemi) and 392Stu (Inertia Motorsports) have figured out the source of the infernal HEMI tick: the pushrods. Apparently, Dodge made the exhaust-side 5.7 rods just a hair too short. This is why folks with the 6.1 rods in 5.7 engines don't have any ticking. Stu now has .025 longer custom pushrods available. I just ordered a set of them and hope to have this damn tick taken care of for good.:d/

dacaman12

Posted: Friday, September 12, 2008 5:02:56 PM

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Joined: 6/11/2008
Posts: 2
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Location: Martinsville, VA

Freeze wrote:

Freeze, I am particularly interested in the results.

FWIW, I like to use what ever length pushrod/base circle combination that gives me lifter preload of about .030-.040 thou (a little less than the factory spec). Lobe lift plays a big role in determining the final lengths(non-adjustable valvetrain).Backing off of the preload seems to give me a little more power and extends the rev limit slightly. Our engines are still making decent power all the way out to 7000rpm with our larger in-house lobe designs and the beehive spring, which is pretty impressive, IMO.

hemijoejr

Posted: Saturday, January 31, 2009 1:22:56 AM

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Location: NJ

I don't know if this still applies being that this thread is so old but I bought a set of adjustable pushrods from Hughes engines. You can adjust the preload to whatever you want it. It is almost impossible to get the wrenches in there though. I was able to set up the #2 cyl on the in take and exh pushrods, measure them and make them all the same before I installed them. They worked perfectly for me!! Later Joe

5.7L Hemi, CNC ported heads with oversize valves, 11-1 compression ratio, Custom Comp Cam, Custom Ross pistons, Eagle rods, 6.1L crank, Dual quads, Cryo treated rockertrain with custom rocker locks and hold downs, Remote mounted coils with MSD Hemi6, SOON TO COME 150hp N2O, ETC, ETC in a 68 cuda

Freeze

Posted: Wednesday, February 25, 2009 12:15:19 AM

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Location: Virginia Beach, VA

Well, I've had the new p-rods in there for what, five or six months now? Valvetrain was pretty quiet after the install, but it has been getting progressively louder. It just sounds loose. Still, it's nothing like it was with the old rods. I was over at Gadier's the other day and the valvetrain on his 383 is silent, so I'm beginning to wonder if my heads are dicked up. I double-checked the rocker arm bolts (torque specs and bolt sequence) during the install, too. Something else has got to be allowing the abnormal noise & movement.

At this point, the truck runs fine, so my next project will be installing the Super 60 I just picked up from Gadier and re-gearing the front to 4.56, then swapping the 260 out for a Spartan cam. That combo should help compensate for the added weight and air resistance from the suspension lift.

hemijoejr

Posted: Friday, February 27, 2009 12:02:09 AM

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This is really weird!!! In order to make the tick the lifters are colapsing or something is loosening up. It started making noise, then stopped when you put the new pushrods and now it's back. Did you check the o-rings on the MDS plugs? You would figure if the lower o-ring was cut or is pushing out it would drop oil pressure to the lifter. I also think the lifters oil backwards, I don't remember. I think the oil comes from the rocker, through the pushrod, and then to the lifter. I think it's ported through the shaft as well so if the hole is off then the lifter won't get any oil. When you changed the pushrods, the lifter was compressed again, now that it has some running time it colapsed again. Just some ideas to check out. Joe

BronxMopars1

Posted: Thursday, September 23, 2010 5:11:22 PM

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Joined: 9/23/2010
Posts: 3
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Location: Bronx

Is the Tic just on strokers or stock 5.7's also? my truck sounds like it has a valve tap but no check engine lights?

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