engine knock

Good morning,

Can you upload a video of the noise so I can hear it?

https://www.2carpros.com/articles/engine-noises

Roy

There’s that as I rev the RPMs up it goes higher and higher and you can hear it more. my buddy said lifter knock. I don't know. I tried using Lucas oil heavy stabilizer worked for a day then came back. I was going to try Marvel Mystery Oil next oil change to see. Please help.

Okay, thanks.

That noise is lifters. I would do a manual oil pressure test to be sure you have the correct pressure to the top of the motor for the lifters.

None of those additives have any effect on noises.

If the pressure is 20 at idle and 40 at 1,500 RPMs, then you need a set of lifters.

https://www.2carpros.com/articles/high-or-low-engine-oil-pressure

Roy

So if I put Marvel Mystery Oil in at next oil change it wouldn’t benefit it at all? Can I use it in my gas too to keep it clean or no?

Should I still put the Marvel Mystery Oil in crankcase at oil change just to clean it and my gas then to make it run good?

Forget about the marvel mystery oil. It has little or no effect at all.

Check the oil pressure as I suggested.

Roy

What if I check the oil pressure and it’s normal but still makes noise?

So what should the pressure be at when I test it?

I posted the specs a couple of posts back.

Idle should be 20 pounds. At 1500 it should be 40 pounds.

If the readings are good then you will need a set of lifters.

Can you tell me if you have the pushrod motor or overhead cam engine?

Roy

So if the readings are at that number then I need lifters. I do not know what kind of motor. it’s a 2011 F150 8 cylinder 5.0 if that helps isn’t if it’s at those numbers then there fine or no.

Can you give me the complete VIN number?

Roy

Yea should I test the oil pressure or no have a shop do it?

You can do the test yourself but if you never did this. it would be better to have a shop perform it.

You need to remove the oil pressure sensor and install the manual gauge.

Roy

Engine Oil Pressure (EOP) Switch

Material
Item Specification
Motorcraft® Thread Sealant with PTFE
TA-24-B WSK-M2G350-A2
Removal

4x2 vehicles

With the vehicle in NEUTRAL, position it on a hoist. Refer to Section 100-02 .
4x4 vehicles

Remove the generator. Refer to Section 414-00 .
All vehicles

Disconnect the EOP switch electrical connector.
Remove the EOP switch.
imageOpen In New TabZoom/Print
Installation

All vehicles

NOTE: If the oil pressure switch is to be reused, apply thread sealant.

Install the EOP switch.
Tighten in 2 stages.
Stage 1: Tighten to 14 Nm (124 lb-in).
Stage 2: Tighten an additional 180 degrees.
Connect the EOP switch electrical connector.
imageOpen In New TabZoom/Print
4x4 vehicles

Install the generator. Refer to Section 414-00 .

I don’t know what that all means. I’m not that familiar with these trucks, so what do I tell the shop that I need to have looked at then?

It’s getting worse.

Just ask them to check the oil pressure with a manual gauge.

Roy

This is different topic but what’s the best oil for my truck? I used blend before but what's the best for these engines with 100,000 miles?

I attached the recommendation below. No additives of any kind.

Roy

Do I need to use Motorcraft?

I read that Marvel Mystery Oil helps clean everything, but I can’t find that oil around any stores by me. so like what brand is good besides that Mobil or Castrol or something? can I use full synthetic or no?

I would use the Mobil one fully synthetic for maximum protection.

Again, no, forget about the Marvel oil. It does nothing for you. The oil has all the additives you need.

Roy

Alright, I will bring to your a shop to get that lifter issues sorted I do have a warranty.

Sounds good.

Keep us updated.

Roy

So, I just say I hear a lifter knock when I start it and when I rev it and as it downshifts going down a hill all you hear is knock loud and at idle loud?

Tell them you have an engine noise and let them tell you the issue.

Roy

The dealer where I bought it the techs there are a bunch of retards they don’t know anything.

If you have a warranty, try another dealer.

Roy

Also every time I drive and turn it feels like the tire shakes. I try to look at it but I can’t clearly see it but when I drive something on the front feels like it out of align.

One thing at a time. Let us see what the issue is with the engine.

Roy

Alright.

Keep us updated.

Roy

Will do.

Is it bad to drive it with that knock until I can get it looked at?

Yes, I would not drive it as you may be doing internal damage to the motor. You need to have it checked as you may need a motor.

Roy

It’s my only transportation and I have work.

I do not know what to tell you. Even when it is diagnosed, you will be without the truck until it is fixed.

Roy

I’m going to call tomorrow do you suggest I get the 100,000 service done for my truck while it’s there or fix the engine first?

Find out what is wrong with the engine first before doing anything.

Roy

Alright be in touch. I don't know if you are from the area I am. but is there a better way of contacting you?

Before I forget so my truck is the flex fuel one I just started using flex fuel gas. what other gas can I use in my tank because they don’t have flex fuel when I go home?