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Engine knock

Tiny
NICKNOCELLA22
  • MEMBER
  • 2011 FORD F-150
  • 5.0L
  • 5 CYL
  • 4WD
  • AUTOMATIC
  • 100,000 MILES
So as I start my truck up this just started to happen as I start my truck there is like 3 knocks then it goes away I put in lucas oil heavy duty stabalizer fixed it for a day and its back at start up and as a rev it when the rpms go up you can hear the knock sounds like lifter knock idk mabye ill try marvel mystery oil
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Sunday, January 10th, 2021 AT 11:21 PM

60 Replies

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good morning,

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

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

Roy
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Monday, January 11th, 2021 AT 4:03 AM
Tiny
NICKNOCELLA22
  • MEMBER
  • 35 POSTS
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.
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Monday, January 11th, 2021 AT 1:46 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
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
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Monday, January 11th, 2021 AT 2:17 PM
Tiny
NICKNOCELLA22
  • MEMBER
  • 35 POSTS
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?
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Monday, January 11th, 2021 AT 2:25 PM
Tiny
NICKNOCELLA22
  • MEMBER
  • 35 POSTS
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?
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Monday, January 11th, 2021 AT 2:30 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Forget about the marvel mystery oil. It has little or no effect at all.

Check the oil pressure as I suggested.

Roy
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Monday, January 11th, 2021 AT 2:40 PM
Tiny
NICKNOCELLA22
  • MEMBER
  • 35 POSTS
What if I check the oil pressure and it’s normal but still makes noise?
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Monday, January 11th, 2021 AT 3:00 PM
Tiny
NICKNOCELLA22
  • MEMBER
  • 35 POSTS
So what should the pressure be at when I test it?
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Monday, January 11th, 2021 AT 6:09 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
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
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Monday, January 11th, 2021 AT 7:47 PM
Tiny
NICKNOCELLA22
  • MEMBER
  • 35 POSTS
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.
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Monday, January 11th, 2021 AT 11:59 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Can you give me the complete VIN number?

Roy
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Tuesday, January 12th, 2021 AT 3:22 AM
Tiny
NICKNOCELLA22
  • MEMBER
  • 35 POSTS
Yea should I test the oil pressure or no have a shop do it?
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Tuesday, January 12th, 2021 AT 12:23 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
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.
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Tuesday, January 12th, 2021 AT 2:32 PM
Tiny
NICKNOCELLA22
  • MEMBER
  • 35 POSTS
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?
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Tuesday, January 12th, 2021 AT 3:10 PM
Tiny
NICKNOCELLA22
  • MEMBER
  • 35 POSTS
It’s getting worse.
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Tuesday, January 12th, 2021 AT 3:11 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Just ask them to check the oil pressure with a manual gauge.

Roy
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Tuesday, January 12th, 2021 AT 3:20 PM
Tiny
NICKNOCELLA22
  • MEMBER
  • 35 POSTS
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?
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Tuesday, January 12th, 2021 AT 4:00 PM
Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
I attached the recommendation below. No additives of any kind.

Roy
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Tuesday, January 12th, 2021 AT 4:14 PM
Tiny
NICKNOCELLA22
  • MEMBER
  • 35 POSTS
Do I need to use Motorcraft?
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Wednesday, January 13th, 2021 AT 12:17 AM
Tiny
NICKNOCELLA22
  • MEMBER
  • 35 POSTS
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?
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Wednesday, January 13th, 2021 AT 12:18 AM

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