Help-I think i ate a cam - Hemi Truck Club
 
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Old 03-14-2016, 07:31 PM   #1
allan
 
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Help-I think i ate a cam

After all the info i've gotten from just reading here the past few months, I'm sure i'm in the right place. Ive got a 2010 RAM 2500 4x4 crew cab 5.7 with a 111k miles. I got it at 106k so haven't driven it that much. I changed the oil at 110k with Pennzoil platinum 5w20 and a K&N filter. About 800 miles later i started getting a minor tick that seemed to be on the right side. It was minor but noticeable to me since it had been totally quiet up til then. Over a couple of weeks it kept getting louder. The engine light came on and had a P0308 code and developed a miss.I reset it and it was just a few miles it popped back on. Since it had been 45k since it had plugs I picked up a set of OE NGK's to install over the weekend and try a different oil and filter combo. On friday before doing plugs it started missing worse and when under a strain had a muffled popping sound in the exhaust and lost power. I was just down the street so i eased on home.
When changing plugs i pulled the right side valve cover since it was easy with air filter and coil packs off. The #8 exhaust rocker is loose enough to slide front to rear enough to almost come off the top of the valve stem. When i turn the engine by hand it barely moves up and down. Its about 1/4 the lift of the other 3 valves. Valve springs look good. I removed the exhaust rocker assembly and just put thumb pressure on the pushrods and there is still very little movement when turning the engine. Doesn't this sound like a lobe worn off the cam? I'm sorry this is so long but i wanted to list all the info i could think of. Any other ideas?

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Old 03-14-2016, 08:11 PM   #2
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I am not a Hemi expert so take my advise with a grain of salt, i would look for a collapsed lifter first
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Old 03-14-2016, 08:18 PM   #3
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Do you still have the filter that you replaced? If so you might cut it open and see if there is any metal showing.
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Old 03-14-2016, 08:44 PM   #4
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Quote:
Originally Posted by Redtruck-VA View Post
Do you still have the filter that you replaced? If so you might cut it open and see if there is any metal showing.
Along those lines it wouldn't hurt to cut the filter open that's currently on there. Filters are cheap.

Hopefully it's not major!
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Old 03-14-2016, 08:55 PM   #5
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Going to check filters and oil tomorrow. Hoping for lifters or something less drastic. Thanks.
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Old 03-14-2016, 10:27 PM   #6
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Since your truck is a 2500, does it have VVT or MDS? If it doesn't then a cam change is not difficult.
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Old 03-14-2016, 11:05 PM   #7
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Quote:
Originally Posted by Redtruck-VA View Post
Since your truck is a 2500, does it have VVT or MDS? If it doesn't then a cam change is not difficult.
VVT yes, MDS no.
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Old 03-14-2016, 11:37 PM   #8
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I know little about the newer models, but the VVT replacement cams seemed very pricey. If it is a cam, you might check the various hemi speed shops who do a lot of cam swaps and see if you can get a take off.
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Old 03-15-2016, 12:28 AM   #9
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But the non MDS lifters are cheaper. Not enough to offset the cam price but hey, Im trying to make myself feel better. I found a you tube video of a guy spinning a motor over that had a bad cam. It was identical to mine so I'm not optimistic. I'll do some more looking at it in the morning to try to make sure.
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Old 03-15-2016, 05:53 AM   #10
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Sounds like a lobe or lifter to me from the steps you went thru already. Drainage coolant and remove that head and have a look at the lifter in there! Either the wheel is going to be gone and maybe the cam is good still or the cam is shot and you need a new one. If the can has any score marks on it change it out it will get a ton worse fast.
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