← Back to AFM/DOD

May 21, 2022 — Low oil pressure after lifter release and VLOM modify

By Aaron Puffw | May 21, 2022 12:00 AM | 0 views
May 21, 2022
Low oil pressure after lifter release and VLOM modify

i have a 2014 Silverado with 5.3L AFM and after releasing the lifter and completing the VLOM modification. It worked but now the Oil pressure is around 15psI. I also replaced the fuel pump, fuel injectors w/rail, PCV valve and oil pressure sensor. Any suggestions?

12 Comments
514 Views

Replies (11)

By Crazed Performance Repair | Sep 1, 2026 8:26 PM
May 23, 2022
"

Well, the VLOM only flows oil during AFM activation. However, that part where the sensor is plugged into actually goes into the main oil galley at the top of the engine. This is so that I can read engine oil pressure and the part the vlom plug blocks off, is the part that feeds from the main oil galley to the solenoids in the VLOM.
By Aaron Puffw | Sep 1, 2026 8:26 PM
May 23, 2022

@Crazed Performance Repair I thought the same that oil should have been shooting out But does the engine valley completely fill up with oil when running To make it shoot out? I will drill the hole bigger. I put a straw brush down past the plug to help prevent any metal from drilling drop in And i used vacuum pressure when drilling instead of pushing air in to help prevent any debri entering engine
By Crazed Performance Repair | Sep 1, 2026 8:26 PM
May 23, 2022
"

If you had it running with sensor out there should have been oil shooting out. Hmm, something tells me the hole is blocked or something.
By Aaron Puffw | Sep 1, 2026 8:26 PM
May 23, 2022

@Crazed Performance Repair I could feel air between the holes. but when I left the sensor out there was no oil coming out. Should I drill a bigger hole same diameter as the one in sensor?
By Aaron Puffw | Sep 1, 2026 8:26 PM
May 23, 2022

Taking several hours to get the injectors out made it a priority to clean out the holes
By Crazed Performance Repair | Sep 1, 2026 8:26 PM
May 22, 2022
"

Hopefully you cleaned out injector holes in the head. They tend to corrode and when you try to slide new seals in It tears the seals.
By Aaron Puffw | Sep 1, 2026 8:26 PM
May 22, 2022

ok. I think I can do that. Thanks! Your videos have been great! I donu2019t normally work on vehicles but you helped build my confidence to tackle the task. Only slight difference was the VLOM requiring the fuel pump and injectors to be removed to get the VLOM out. The injectors were stuck and I bent the rails Trying to get them out which was fine because they needed replaced too.

Thanks, again! You were very helpful!!
By Crazed Performance Repair | Sep 1, 2026 8:26 PM
May 22, 2022
"

Only if you take proper precautions and nothing is in your way. You will need to add slight positive pressure to oil system before drilling so any debris is pushed out. You could do this by pulling the plug you installed VLOM plug from and adding small amount of shop air while drilling.

Show more replies
By Aaron Puffw | Sep 1, 2026 8:26 PM
May 22, 2022

Crap! I failed to drill the hole. Do u think I can drill hole into the plug without removing it?
By Crazed Performance Repair | Sep 1, 2026 8:26 PM
May 21, 2022
"

That's the direct injection model. There were VLOM plug instructions that should have came with your kit. On those models you need to make sure the sensor can access the oil galley past the VLOM plug. If it can't a small hole needs to be installed per the instructions. Did you check that the sensor could read oil pressure?
By Aaron Puffw | Sep 1, 2026 8:26 PM
May 21, 2022

Also my VLOM Is different. The fuel pump sits on top of it.

Members
Ryan Tucker
Follow
jsomething
jsomething
Follow
johnwillsey
johnwillsey
Follow
Tom DeWitt
Follow
Taylor Byrd
Follow
See All Members (39)
4.9 u00b7 Reviews

Post a Reply

Login to post a reply.