Chrysler 3.6L Camshaft Replacement Job

Timothy Owner/Technician Georgia Posted   Latest  
Unsolved
Drivetrain
2015 Chrysler Town & Country Touring 3.6L (G ERB Flex) 6-spd (62TE) — 2C4RC1BG6FR645247
P0301 — Cylinder 1 Misfire Detected
Stumbles/Misfires At Idle
Misfire Counts Up On Cylinder 1 At Idle
Tapping Noise

Hello folks,

Have this 3.6L engine with 184,418 miles on the clock. Had tapping noise under valve covers. 

Removed both valve covers and found rocker arm rollers and camshaft lobes worn on intake of cylinders 1, 3, 4, and 5. Rear bank = cylinders 1, 3, 5 Front bank = cylinders 2, 4, 6. Other cam lobes have pitting marks on them. No codes currently for camshaft timing/phasers so they appear to be working correctly at this time.

We are planning to replace all camshafts, lifters, and rocker arm/rollers.

Is there anything else we should be sure to replace or consider while doing this job? My biggest question is about the cam phasers and oil control valves. No codes for them at this time but who knows when they will fail.

Is there any common cause for the rocker/rollers and camshaft lobes to wear other than lack of maintenance? Inside of engine looks clean.

See pictures of camshafts/rollers here. xoxocar​.​com/inspection/766…

I am aware of the magnetic tone ring on each camshaft so I will take care to keep them away from all other magnets.

Regards, Timothy

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Bill Owner
Maryland
Bill
 

Timothy, I am not sure if I would even be doing that repair on an engine with 184K miles on it. Chances are pretty good that something will go wrong with the rest of the engine in the near future. At the very least I would cut the oil filter open and see if there is any bearing material showing up. I would have to seriously think about an entire engine replacement myself.

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Ninel Mobile Technician
Washington
Ninel
 

Agree 👍

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Timothy Owner/Technician
Georgia
Timothy
 

Engine replacement is an important thing to consider in this situation. Thanks for the reminder.

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Jesse Engineer
Missouri
Jesse
   

That's going to be a costly repair as cams are $275 each. And they are position specific. Rockers are about the same, $275, for 12 or 24 I forget. The roller bearings in the rockers seem to be a weak point. Seems 150-160k is about their limit even if cared for. Tiny bearings, high load with impacting forces. Had to replace a few in one with 165k on it. Found a burnt engine, pulled the cam I…

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Darren Owner/Technician
Arkansas
Darren
 

As several have mentioned that replacing the engine is a better/safer solution. If repairing I would strongly urge dropping the pan before repairing the original engine. I see a lot of fine particles stuck to the tone rings and you can bet there will be a lump of metallic sludge at the drain plug boss. You should also think about the 2 stage oil pump and possible wear/scoring not to mention the…

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David Owner/Technician
Alberta
David
 

Lots of failures on these and not all due to oil maintenance IMO. Engineering is likely the root of it. This one is nice and clean. Have they used the correct spec oil for the engine? Does it get a lot of idling time? I dunno. This one does look pretty clean. You cannot be sure none of the ground up roller chunks will not have ended up in the oil pump or elsewhere and we all know that. Looking…

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Brian Technician
Virginia
Brian
 

Ive done many cams on this engine. Caravans and jeeps. I have yet to have a bad phaser. Get new oil valves(bolts) for the phasers. Easy job…. No timing cover removal…

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Jeff Owner/Technician
California
Jeff
 

We did the same job at 143K 3years ago. Now has 190K. No issues so far. I agree with consider the overall condition. I would do chain, tensioners and phasers if you're going to do the job.

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Robert Owner/Technician
Washington
Robert
 

I've done these before, the rockers fail similar to the Ford 5.4 3 valve. Just some thoughts… The metal that comes off the cam and rocker happens over time and is usually very fine not course shavings. it gets washed into the oil pan right away from the oil valve on the rocker. the next oil change the majority of the metal is drained out. any metal circulating only goes through the oil pump…

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Gerald Owner/Technician
Massachusetts
Gerald
 

We’ve done these at my shop. The oil control valves and cam phasers are only issues on the older 3.6. you should be ok to reuse them. I think the highest mileage 3.6 engine we’ve replaced cams on was about 140k. We have a customer with a 3.6 on a caravan that’s pushing 280k with the original cams/rockers. Basically I would just explain to them what you are replacing and give them the price. We…

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Glenn Owner/Technician
Texas
Glenn
 

Hello Timothy, If it were my own personal vehicle, I would likely take the risk. This being a customer's vehicle I would consider a quality reman long block with a good warranty. The ultimate determination would be to inspect the oil pump and a couple of Main and rod bearings for any signs of damage or excess wear that is wearing into the brass of the Babbit bearings. Even at 184K miles they…

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Timothy Owner/Technician
Georgia
Timothy
 

The pictures show has lots of writing overlayed on them and they are hard to determine what is shown. Glen, if you click on each picture it should open full screen so the words don't interfere. And if you open the link again there are pictures of the filter pleats spread out. xoxocar​.​com/inspection/766…

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David Owner/Technician
Alberta
David
 

How much of the little bits are ferrous metal? I check with a magnet. Of course we use a filter cutter so as to not introduce any extra “stuff” and I am not sure what those bits are in the photos.

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Timothy Owner/Technician
Georgia
Timothy
   

I would say about 30% of them are shiny metallics. Interesting that we got a 2016 Jeep 3.6L USPS delivery vehicle with 113,299 miles in this afternoon that had that ominous tick at idle. Pulled oil filter, cut ends off filter and laid it out. Had almost more metallics on filter than the Town and Country but had less noise. Might get to do two of them in a row.

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David Owner/Technician
Alberta
David
 

It is really interesting to see things like this. We know the only way those little metallic particles got to the filter was from being sent there through the pump. I see some pump damages when pulling pumps apart but they still worked enough to keep the engine running reasonably well. There would be even more large and smaller particulate that never got filtered at all and went through the…

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Roy Owner/Technician
Colorado
Roy
 

WE have done a lot of these with over and under 100K with no problems, but I would always give them the option of engine replacement and make sure they decline it on the repair order, also noting they know the risks.

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Steve Owner
California
Steve
 

At this mileage and due to all the wear you mentioned it would be best to replace the engine and cost effective. I did one on a 2015 200 that was in constant repair at 88,000 miles including valve seat issues. I ordered a new 3.6 from mopar @ $3797.00 and it was NEW, been great ever since and came with a 3 year/100k warranty. Also included spark plugs and new oil cooler assy!

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Jake Technician
Wisconsin
Jake
 

Roller failures are super common on the 3.6. If this is the first set in 180k, I'm impressed. Change all the lifters and followers, and any worn cam, and ship it. It's a gravy job.

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Juan Diagnostician
District of Columbia
Juan
 

I recently replace both camshaft and all rocker arms on the right bank. The engine only had 78k miles on it. Remember to quote all the gaskets that will be remove. Buy the oem special tool if you don't have it, that way you don't have to remove the timing cover. There is some replicas on Amazon, but all of them are made out of weak plastic(they still work). Watch a youtube video on how to use…

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Justin Technician
California
Justin
 

!!!!!! DONT FORGET TO TIGHTEN THE OIL GALLEY BOLTS BELOW EACH PHASER . Had one the other day that actually had a crack on bolt head and oil leaked out when you cranked engine .

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