DenverCORamOwner
Junior Member
Let me give you some background. My truck is a 2009 1500 5.7. I blew the engine like 9 months ago [ceased completely] replaced with an engine from a truck that had been set on fire and also had bad cams and lifters. I suspect the owners of the truck where that engine came from might have burned it up intentionally for an insurance claim, but that's none of my business. I got a good deal on the engine and the crankshaft was turning good. My old cam and lifters were good so I decided to swap them over to the "new" engine along with coils. Yes, if I had the money I would have replaced them with brand new lifters as is suggested.
I took my time on getting the timing correctly. Setting the markers top center, piston 1 at its top position, and reassembly and did everything good, as far as I could tell. Truck kept throwing P0305 codes and P0300 codes when getting above 2500 rev's. As I understand this is when the MDS system activates. I previously posted on this forum and folks identified my mistake of not replacing lifters with brand new ones.
Torn engines down again to the lifter and trying to identify if any more mds lifters are bad.
Ideally, I know it is best to replace all lifters if you have the opportunity. However it is a budget thing and I know that many mechanics run into this issue of their clients not having the money to change out the lifters. The cam is good, no lobes or wearing. My question is how do you test each individual mds lifter to know it is good. All the videos I see of replacing lifters show that they are worn to death, are stuck, don't turn, and are obviously busted.
I been trying to educate myself on how MDS lifters actually work, and there is limited resources on this issue. So far I understand that the MDS Solenoids, when activated, send a signal or pulse to the lifters at which point the lifters have pins on their distinctive holes that lock and get charged up with oil.... and then the proper lift is reached where that piston can fire. [Please correct me if Im wrong].
When there is no distinctive wearing on the roller of the MDS Lifters, what else might indicate that it has gone bad? Besides the codes. I know for sure swapping the 305 fifth cylinder.
I will attached some videos of the lifters:
www.youtube.com
I did see some lifters on rockauto for 400 bucks and am saving up for those. Has anyone used these or know of something around that budget that is better?
ENGINETECH L5701K
I took my time on getting the timing correctly. Setting the markers top center, piston 1 at its top position, and reassembly and did everything good, as far as I could tell. Truck kept throwing P0305 codes and P0300 codes when getting above 2500 rev's. As I understand this is when the MDS system activates. I previously posted on this forum and folks identified my mistake of not replacing lifters with brand new ones.
Torn engines down again to the lifter and trying to identify if any more mds lifters are bad.
Ideally, I know it is best to replace all lifters if you have the opportunity. However it is a budget thing and I know that many mechanics run into this issue of their clients not having the money to change out the lifters. The cam is good, no lobes or wearing. My question is how do you test each individual mds lifter to know it is good. All the videos I see of replacing lifters show that they are worn to death, are stuck, don't turn, and are obviously busted.
I been trying to educate myself on how MDS lifters actually work, and there is limited resources on this issue. So far I understand that the MDS Solenoids, when activated, send a signal or pulse to the lifters at which point the lifters have pins on their distinctive holes that lock and get charged up with oil.... and then the proper lift is reached where that piston can fire. [Please correct me if Im wrong].
When there is no distinctive wearing on the roller of the MDS Lifters, what else might indicate that it has gone bad? Besides the codes. I know for sure swapping the 305 fifth cylinder.
I will attached some videos of the lifters:
March 10, 2024
www.youtube.com
I did see some lifters on rockauto for 400 bucks and am saving up for those. Has anyone used these or know of something around that budget that is better?
ENGINETECH L5701K
2010 DODGE RAM 1500 PICKUP 5.7L V8 Valve Lifter | RockAuto
RockAuto ships auto parts and body parts from over 300 manufacturers to customers' doors worldwide, all at warehouse prices. Easy to use parts catalog.
www.rockauto.com
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