Melling M340HV or M360HV oil pump?
 

I have a 2010 4.6 3V with 116K, and am starting to figure out everything I’d need to redo the timing chain, sprockets, guides, actuators and VVT sprockets. As part of that I plan to replace the oil pump too. I know the M340HV is the higher volume replacement pump for the 3V, but is there any reason I should consider the M360HV pump instead? The 360 is technically a 4V pump, but I wasn’t sure if a bit more pressure was a good or bad idea on a 3V.

Well, the M340HV has a 60psi relief spring, and the M360HV has a 80psi relief spring. But either way, the M340HV is sufficient. More volume is better than higher pressure. (even if both are 20% more volume over stock)

Thank you! That’s what I was thinking as well. The higher volume but stock pressure is probably better, especially since the higher volume will help to actually keep it at the proper pressure vs the stock put that’s inadequate. I was also a little worried that the higher pressure could throw the VVT and other oil pressure-dependent stuff off.

The interesting thing is that a side effect of the higher volume is higher hot idle pressure. Instead of stock 25-30psi, you'll get about 40psi hot idle (from watching Makuloco's videos). The VCT and cam phasers actually do like the higher oil flow/pressure from the Melling pumps (FordTechMakuloco recommends using the M360HV, even though those are meant for 4 valve engines - I bought the M340HV)

What I found amazing was that on my 2006 F-150 5.4L, the oil pressure from the stock pump is higher than I thought it would be. (I have 98,000 miles on my truck. I kept reading that the stock oil pump is 15psi hot idle)

At 75MPH
https://i.imgur.com/5LJBaOrl.jpg

After full warmup
https://i.imgur.com/UlSkQiXl.jpg

340Hv
 

Just got done tearing mine apart lol
https://cimg0.ibsrv.net/gimg/www.f15...6ed8a1050.jpeg
Chain guide came apart in the motor
https://cimg2.ibsrv.net/gimg/www.f15...b5ed0e6ac.jpeg

Thats funny. You actually beat me to this job. I finally have all the parts gathered and am fixing to do this job in 2 weeks.

Congrats on getting yours all done!

Makeuloco channel is awesome, he's the best source for Fotd vehicles especially the F150. I've also got a 2006 with the 5.4l . I'm at 213k right now and I'm considering doing the timing chain kit and melling upgrade as a bit if preventive/proactive maintenance.

Where did you get youre kit from? I've been needing to do mine and have looked a couple different kits but haven't pulled the trigger on anything yet. Also a good read on the oil pumps as I'm gonna change that on mine as well. Makulocko is a fantastic source for a lot of questions.

I reached out to a tech from Melling with the question which Melling oil pump would be best suited for my 2010 F150 Lariat with 205tkm on the 5.4l. Engine is fine at this point but I wanted to proactively change to a higher volume/(pressure?) pump.
Here is their response:The difference between the M340HV and M360HV is the pressure relief valve spring. The M340HV relieves at around 60psi and the M360HV at around 80psi. The 10341 comes with the 80psi spring installed and the 60psi spring in the box so it can be either pressure. The reason I recommend the correct pump pressure is because Ford engineered the VVT system to operate at the pressure limits that they calibrated it to run in. The higher volume output will help keep the pressure up where it belongs. I have also had a handful of people contact me after installing an M360HV with a check engine light and they replaced with M340HV and light did not come back but I cannot explain why or if it was certain years or models.

Can you run the M360HV? Yes, and many people have without concern.

My question would be, has anyone experienced said check engine light error after installing the M360HV (high volume/high pressure?

Thanks,
Steve

Steve thanks for clarifying this info with their answer. I’m doing a timing job right now on my 07 3v 5.4L with 235k mi and about to install the M360HV. I was unaware of this check engine light issue but good to know. I bought off Amazon where Ford Tech Makuloco recommends and the reviews in there make no mention of check engine light issues. Wondering if those issues were user error that set the light or the actual pump/pressure. Curious what codes accompanied the check engine light. Did he mention that to you?