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Misfire and tapping?

Tiny
BHAMDOC1973
  • MEMBER
  • 2013 DODGE DURANGO
  • V8
  • 2WD
  • AUTOMATIC
  • 175,000 MILES
Is it possible that if the rocker arm or lifter tapping is on the same side where the misfire is that it can be due to the lifter? As in the lifter being bad causing a misfire? I replaced lifters on Hemi's before but didn't have a misfire.
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Thursday, March 2nd, 2023 AT 5:40 AM

11 Replies

Tiny
BHAMDOC1973
  • MEMBER
  • 1,542 POSTS
I switched coils and plugs same issue. Checked signal on coil and injector and there is power.
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Thursday, March 2nd, 2023 AT 9:56 AM
Tiny
BHAMDOC1973
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Check out what I found.
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Thursday, March 2nd, 2023 AT 10:42 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,640 POSTS
Hi,

There should be a push rod that runs between the camshaft and the rocker arm. Is the rocker arm broken? Can you see the pushrod?

And yep, that is certainly the misfire. Did you purchase the vehicle this way?

Let me know.

Joe
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Thursday, March 2nd, 2023 AT 7:39 PM
Tiny
BHAMDOC1973
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Yes, I did get it this wayZ no push rod anywhere. I ordered another. Someone been in there maybe to check or replace something but they have maybe forgotten to put it back, cause rocker arm set has been removed before.
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Friday, March 3rd, 2023 AT 5:40 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,640 POSTS
Hi,

That is odd to forget a pushrod. I'm questioning if they left it out to eliminate the noise so they could sell it.

Let me know what happens when you install the new one. I'm interested in knowing. Also, let me know if I can help.

Take care,

Joe
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Friday, March 3rd, 2023 AT 7:31 PM
Tiny
BHAMDOC1973
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Yes, possible that the noise was worse, so they left the rod out. Anyways, just removed the head to find out that the same cylinder has one bad lifter, cam looks good. Also found that the cap that goes on the end of the other lifter, which has the missing rod is just lying there. So weird, never see that before. And guessing having no rod she popped off, but I see the others actually have a snap ring, so heck I don't know where that is, I'll look further maybe I will find it. I will order 2 lifters.
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Monday, March 13th, 2023 AT 5:16 PM
Tiny
BHAMDOC1973
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Here
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Monday, March 13th, 2023 AT 5:17 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Wow. I guess if the lifter was totally collapsed, the pushrod could have come out, but that is an odd one. I don't remember seeing that happen in the past. I've seen bent ones, but not this.

Let me know how things turn out when the parts arrive. Also, let me know if I can help in any way.

Take care and thank you for the update. It's appreciated.

Joe
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Monday, March 13th, 2023 AT 8:52 PM
Tiny
BHAMDOC1973
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Just to confirm, for the front set on passenger side, the mds lifters are on the front of the set correct?
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Thursday, March 16th, 2023 AT 10:27 AM
Tiny
BHAMDOC1973
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What is the torque spec for the head bolt as well as the 10 mm bolts on the head by intake please. Also, the torque for the rocker arm assembly bolts.
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Thursday, March 16th, 2023 AT 4:06 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

If you look at pic 1, it provides the torque specs and sequence. Note there are several steps that need to be performed when doing this. Follow them as closely as possible.

The remaining pics are the directions and cautions for replacing the rocker assembly. The torque specs and procedures are included.

The very last pic is for the valve cover. I figured you may need that as well.

Let me know if this helps or if you have other questions.

Take care,

Joe

See pics below.
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Thursday, March 16th, 2023 AT 8:17 PM

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