That's the Pentastar tick — a rocker arm's needle bearings have collapsed and the roller is dragging on the camshaft. We replace the full bank of rockers and the cam at your home, before the debris spreads.
The 3.6 Pentastar's rocker arms ride the camshaft on tiny needle-bearing rollers. On these engines — and it shows up disproportionately on the left bank — the needle bearings inside a roller collapse. The roller stops rolling and starts dragging across the cam lobe instead, grinding it down a little more with every revolution. That's the tick: steady, mechanical, and unlike an exhaust leak it doesn't fade when the engine warms up.
As the lobe wears, the valve it operates stops opening fully. The engine computer notices the camshaft behaving sluggishly and sets P000A — camshaft position slow response — and you feel it as a rough idle and a motor that's lost its smoothness. Meanwhile the collapsed needle bearings themselves are loose steel rolling around the top of your engine, riding the oil to places they should never be.
The correct repair is not one rocker. All twelve rockers on the affected bank have identical mileage and the identical failure mode, and the cam lobe the dead one was dragging on is already damaged. Bank of rockers, new camshaft, fresh oil to carry out the debris — done once, done right. Replace just the noisy one and you'll be doing this again within the year.
If your Jeep / Dodge is doing any of these, this is the likely cause:
Two things get worse while you wait: the cam lobe keeps grinding down, and the collapsed needle bearings keep circulating through the engine's oil system. The first costs you a camshaft you were already buying. The second can cost you the engine, because hardened steel needles don't pass through bearings politely. A Pentastar tick caught early is a one-day valvetrain job; ignored for months, it can become a bottom-end problem no valve cover removal will fix.
Yes. The Pentastar's camshaft comes out with the head still on the engine — valve cover off, cam out, rockers replaced, cam in. No hoist, no engine removal. It's a full day of precise work, and it happens entirely at your home.
Because the real repair is a camshaft and a full bank of rockers, which is hours of skilled valvetrain labour plus OEM parts at dealer markup. Some dealers also pad the quote in case they find lobe damage they expect to find anyway. We inspect first, then give you one flat quote for the complete job — cam, twelve rockers, gaskets, oil — before touching anything.
They went in together and they wear together. The other eleven have the same needle bearings at the same mileage, and the labour to get back in there is the expensive part. Replacing the full bank while the cam is out is the difference between fixing this once and fixing it annually.
Same family of failure, different part. The HEMI's tick is a seized MDS lifter roller; the Pentastar's is a collapsed rocker arm roller. Both end with a roller dragging on a cam lobe, both spread metal through the oil, and both reward early action. We work on plenty of each.
Send it over for a free second opinion. I'll tell you straight what the job actually involves — and if their quote is fair, I'll tell you that too.
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