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5.7 Cam and lifter replacement #3046759 05/31/22 02:16 PM 05/31/22 02:16 PM
Joined: Jan 2003 Posts: 1,692 Seattle WA R RichV OP top fuel
RichV OP top fuel R Joined: Jan 2003 Posts: 1,692 Seattle WA	My #8 intake cam lobe is shot on my 2010 Dodge Ram 1500. This truck has about 180,000 miles on it. It has been fairly well taken care of with oil changes etc and Amsoil synthetic lube everywhere. It ends up going skiing a lot so the extended idle in the parking lots to stay warm or warm up probably helped to it's demise. The cheapest fix will be to replace the cam and lifters only. It looks like new crate motors are out of stock. Is this a fools errand, due to all the grit in the engine, plus the fairly high mileage on the engine already?

Re: 5.7 Cam and lifter replacement [Re: RichV] #3046787 05/31/22 04:04 PM 05/31/22 04:04 PM
Joined: Jan 2003 Posts: 3,031 Erda, UT 67Charger master
67Charger master Joined: Jan 2003 Posts: 3,031 Erda, UT	I just went through a '13 5.7 from a Durango that wiped a lobe. LOTS of grit in the oil galleys, MDS solenoids, pump bypass, etc. Its either full tear down or sell it for $700 as a good core with a wiped lobe for someone else to go through and clean out. It would only take a few errant chunks of old cam to destroy the new lifter rollers and do it again. 11.33 @ 118.46 on motor 10.75 @ 125.35 w/ a little spray Now, high Speed Open Road Racing - Silver State Classic Challenge, Nevada Open Road Challenge, Big Bend Open Road Race Rocky Mountain Race Week 2020, 2022 2.0, Sick Week 2023

Re: 5.7 Cam and lifter replacement [Re: RichV] #3046793 05/31/22 04:16 PM 05/31/22 04:16 PM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	I have torn apart a ton of them and bearings and stuff usually look like new, the first one I did had 300,000 miles on the original motor and the motor looked great upon complete dissasembly. The stuff usually gets caught in the filter and settles into the bottom of the pan as it is steel and heavy. Another time I bought a 2009 3/4 ton in Tuscon with a bad cam/lifter and drove it over 1000 miles home and again bearings looked new. I would throw in a new cam and only use the new mopar lifters, make sure when you buy the lifters from the dodge dealer or online or whatever that the last 2 digits of the part number are "AD" they have larger needle bearings that do not get stuck on as small of a particle as a smaller needle does. The lifter is the problem not the cam, the flat cam is a result not a cause. Try rolling the "good" lifters from the other 15 lobes on a flat piece of glass and you will hear some of them clicking already before they ate those lobes. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: 5.7 Cam and lifter replacement [Re: HotRodDave] #3046958 06/01/22 02:34 AM 06/01/22 02:34 AM
Joined: May 2003 Posts: 6,562 Downtown Roebuck Ont Twostick Still wishing...
Twostick Still wishing... Joined: May 2003 Posts: 6,562 Downtown Roebuck Ont	Originally Posted by HotRodDave I have torn apart a ton of them and bearings and stuff usually look like new, the first one I did had 300,000 miles on the original motor and the motor looked great upon complete dissasembly. The stuff usually gets caught in the filter and settles into the bottom of the pan as it is steel and heavy. Another time I bought a 2009 3/4 ton in Tuscon with a bad cam/lifter and drove it over 1000 miles home and again bearings looked new. I would throw in a new cam and only use the new mopar lifters, make sure when you buy the lifters from the dodge dealer or online or whatever that the last 2 digits of the part number are "AD" they have larger needle bearings that do not get stuck on as small of a particle as a smaller needle does. The lifter is the problem not the cam, the flat cam is a result not a cause. Try rolling the "good" lifters from the other 15 lobes on a flat piece of glass and you will hear some of them clicking already before they ate those lobes. How did the oil pumps on those engines look? Any trash that didn't go directly into the bottom of the pan would get sent to the oil filter but it has to go through the pump first if in fact anything stays suspended long enough for that to happen. Kevin

Re: 5.7 Cam and lifter replacement [Re: Twostick] #3047049 06/01/22 12:42 PM 06/01/22 12:42 PM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	Oil pump rotors have just a little evidence of some particles going through them but they would all still build at least 20PSI oil pressure at hot idle before dissassmbly. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: 5.7 Cam and lifter replacement [Re: HotRodDave] #3047101 06/01/22 02:07 PM 06/01/22 02:07 PM
Joined: Jan 2011 Posts: 15,867 Central Florida larrymopar360 Stud Muffin
larrymopar360 Stud Muffin Joined: Jan 2011 Posts: 15,867 Central Florida	HotRodDave thank you very much for that part number information! I've been wondering how does one know they are getting the revised lifters and not ones that have been riding the shelf for years! Facts are stubborn things.

Re: 5.7 Cam and lifter replacement [Re: RichV] #3048051 06/05/22 02:11 PM 06/05/22 02:11 PM
Joined: Jan 2003 Posts: 1,692 Seattle WA R RichV OP top fuel
RichV OP top fuel R Joined: Jan 2003 Posts: 1,692 Seattle WA	Can you get the cam out of a Ram without removing the AC condenser?

Re: 5.7 Cam and lifter replacement [Re: RichV] #3048085 06/05/22 04:16 PM 06/05/22 04:16 PM
Joined: Sep 2014 Posts: 1,407 Central Pa M moparjim79 pro stock
moparjim79 pro stock M Joined: Sep 2014 Posts: 1,407 Central Pa	Originally Posted by RichV Can you get the cam out of a Ram without removing the AC condenser? I dont know how similar they are, but for a grand cherokee, it says you MUST remove it. Ive seen 2 videos on YouTube of individuals doing cam swaps with it pulled to the side, not evacuated and refilled. Maybe same for you?

Re: 5.7 Cam and lifter replacement [Re: moparjim79] #3048283 06/06/22 01:03 PM 06/06/22 01:03 PM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	you do not need to pull the condenser out, plenty of room. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: 5.7 Cam and lifter replacement [Re: RichV] #3060057 07/17/22 11:36 PM 07/17/22 11:36 PM
Joined: Jan 2003 Posts: 1,692 Seattle WA R RichV OP top fuel
RichV OP top fuel R Joined: Jan 2003 Posts: 1,692 Seattle WA	I just got it together, now it won't start. Is it possible the oil pump has not primed properly so only 4 clylinders are active. Where is the oil pressure sensor. I would like to externally prime the oil system. Any other ideas? Cranking speed is uneven.

Re: 5.7 Cam and lifter replacement [Re: RichV] #3060225 07/18/22 01:13 PM 07/18/22 01:13 PM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	The cylinders do not shut off until the lifter gets oil pressure so they are not the problem. Does it "try" to start or anything? Any check engine lights or anything? I would check the crank sensor on the back passenger side of the block, you may have pulled too hard on the harness up front and pulled some pins out of it. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: 5.7 Cam and lifter replacement [Re: RichV] #3060227 07/18/22 01:15 PM 07/18/22 01:15 PM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	It is easy to not get a pushrod seated in the lifter and rocker, both ends can be a pain and could cause uneven cranking. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: 5.7 Cam and lifter replacement [Re: HotRodDave] #3060386 07/18/22 09:28 PM 07/18/22 09:28 PM
Joined: Jan 2003 Posts: 1,692 Seattle WA R RichV OP top fuel
RichV OP top fuel R Joined: Jan 2003 Posts: 1,692 Seattle WA	I loosened the oil filter and a bunch of oil came out. So the idea of no oil pressure is wrong. It will start initially but I shut it down immediately due to a knocking sound. I wonder if I have and exhaust pushrod that is not seated. It won't restart after the initial start. I will pull the valve covers off next to check how the valves are moving. Last edited by RichV; 07/19/22 01:51 AM.

Re: 5.7 Cam and lifter replacement [Re: RichV] #3060451 07/19/22 01:53 AM 07/19/22 01:53 AM
Joined: Jan 2003 Posts: 1,692 Seattle WA R RichV OP top fuel
RichV OP top fuel R Joined: Jan 2003 Posts: 1,692 Seattle WA	The pushrods were not seated on the lifters on cylinder #8. I will check the drivers side tomorrow.

Re: 5.7 Cam and lifter replacement [Re: RichV] #3060554 07/19/22 12:44 PM 07/19/22 12:44 PM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	Originally Posted by RichV The pushrods were not seated on the lifters on cylinder #8. I will check the drivers side tomorrow. I'm not gonna bother telling you how I knew to check that. I am not causing global warming, I am just trying to hold off a impending Ice Age!

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