Ram 2500 6.4L Upgrade Part 18 hemi lifters and cam removal 

Hello, I can try and give a few items to look at. There are many items that can cause a loss of oil pressure. If the pump was replaced with a high volume and the issue persists, then if could be a bad pickup tube to pump seal, blockage, or failing bearings in low end or cam. If I may ask why was the cam and passenger lifers replaced? If it was due to lifter failure this issue with the 6.4 is that on the gas engine there is an internal oil cooler and oil passages that can get clogged up with metal and these areas can not be cleaned out. Was just the passenger lifters replaced? You can try dropping the lower pan and looking for metal in the pan, oil, and or filter. Also look at the lower bearings for wear. Cam bearings inspection would be a bit harder as the cam would need to come out. To be honest since it has had some of the top end rebuilt already and you have 190K miles on it, it might be better to get a some type of replacement or crate rebuild.

Thanks for the comment. This was on done on my personnel rig, so no cost other than parts.

If it were me and I had the top end torn down enough to get to the lifters, I would also do the cam as well. Especially if the lifters are damaged. Is there a reason that you are only looking at lifter replacements?

Currently with the hellcat oil pump on the 6.4L we are seeing 75Psi on cold startup and around 50ish at idle after warm up. We are going to do some extended runs in a bit and see what is looks like. Did you remove and replace the oil pickup tube by chance, what all got changed?

@@solargarage i just changed the cam/lifters/mds delete/phaser limiter. didnt touch the oil pump/pickup or timing components.

@@solargarage im just going to change the oil pump and tube tomorrow just to rule out.

@@digitalme4404 Sound like a plan, on the pickup tube be sure to use a new o-ring and double check that it seats and does not roll out when inserting back into the pump.

@digital me Did you fix the oil pressure? What was the problem? I’m having the same issue.

Depends on there work load and parts availability. Seven days is not bad, considering they have to remove the heads to gain access to the lifters and then all the clean up needed for the reassembly. With work from the primary job taking most of my time and with filming the process, as well as the upgrade work needed on the heads, it took me a few weeks.

Well the job calls for about 10 hours so 7 days is terrible

Thanks for the comment, right at 30K

Hello, What type of vehicle is your 6.4 in? Is this a truck or car application? Have you tried swapping the number 7 injector with a know good one to see if the open circuit fault moves?

@@solargarage it has a constant 12v to #7 injector and number 5 is randomly turning on

@@Sonny1989 Is this for a truck application or a car? Are you using a test light or a voltmeter? The injectors are negative side switched on a Chrysler product directly by the PCM. They should random turn on if you are testing with a test light from battery positive to the negative side of the injector as you crank the engine. Are you testing in this method?

@@solargarage yes I receive a open circuit on the number 7 cyl and multiple misfire. I tested with a noid light and a voltage meter. Too. I tested the truck running and tested the wire straight off the pcm with had 12v the other end is has the pig tail cut off right now! Because when it was on I had ton of white smoke and it would go through a gal gas in 1-2min. It’s like the injector never shuts off I switch it with another injector and it does the same thing on the same number 7. I replaced the cam sensor the crank sensor o2 sensor and about 3k $ other stuff

@@solargarage the truck will run but not on number 5 or 7 cyl that’s the back drivers side injector then second one back from front drivers side bank one. I’m getting a bunch of other cods to like the throttle position sensor ext