Got a 2013 Jeep JK with 170k miles. No ticking sound from the lifters or rockers. I’m replacing the valve covers because of leaks. What do you think about these camshafts? Should I replace them?
It’s tough to judge from a picture. Try running your fingernail over the surface of the cam lobes. If it catches on a ridge, it’s time to replace them.
The bottom right lobe looks pretty bad. I’d go ahead and replace the cams, rockers, and lifters since you’ve already opened it up.
Rohan said:
The bottom right lobe looks pretty bad. I’d go ahead and replace the cams, rockers, and lifters since you’ve already opened it up.
That lobe looks wrecked.
Rohan said:
The bottom right lobe looks pretty bad. I’d go ahead and replace the cams, rockers, and lifters since you’ve already opened it up.
I wasn’t sure at first, but then BAM! That’s rough. Is that lobe even functional, or is it just there for balance?
@Hal
It’s probably just there to sprinkle glitter into the oil.
Rohan said:
The bottom right lobe looks pretty bad. I’d go ahead and replace the cams, rockers, and lifters since you’ve already opened it up.
It took me a second to notice it too, even with the extension pointing at it 
. Good news is, OEM cams seem to have dropped in price.
If needed, swapping the rocker arms, lifters, and camshafts is pretty straightforward.
They look okay in the photo, but it’s hard to say for sure. While you’re in there, torque and Loctite the oil galley bolts. Those can loosen up and cause trouble. I skipped that on mine and now it throws codes and goes into limp mode sometimes. Worth looking into!
Both cams show wear, but that bottom right lobe is toast. Looks like the rocker arm cut into it. I’d replace that cam, plus all the lifters and rockers on both sides. No point leaving the old ones unless they’ve been replaced recently.
They’re looking pretty worn. If I were you, I’d replace them now.
That lobe you’re pointing at is definitely done, and the rear exhaust cam lobe looks questionable too. Check your camshaft reluctor wheels for metal buildup from wear.
Replace both of those camshafts, inspect the other side, and at minimum, replace all the lifters and rocker arms since their bearings often fail. While you’re at it, replace the timing guides, tensioners, and chains. Doing it all now will save you from tearing it apart again later.