engine knocking

Reply Subscribe

Thread Tools

Search this Thread

Mar 17, 2012 | 02:11 AM

#16

usmcdragon

Thread Starter

New User

Joined: Mar 2012

Posts: 10

Likes: 0

Is there a way go check the ignition coils?

Mar 17, 2012 | 02:29 AM

#17

Ironhand03

Posting Guru

Joined: Jul 2011

Posts: 1,720

Likes: 2

A miss fire code will usually appear. A misfire has to happen within a given time to set the code tho.

How does the "knock" sound like?

EDIT: You said you changed the spark plugs right?

Mar 17, 2012 | 02:51 AM

#18

usmcdragon

Thread Starter

New User

Joined: Mar 2012

Posts: 10

Likes: 0

I changed the plugs and the alt. I took off the alt and had it tested turned up bad so i replaced it. I will post i link on here to YouTube tomorrow. I will record a video of it.

Mar 17, 2012 | 02:53 AM

#19

Ironhand03

Posting Guru

Joined: Jul 2011

Posts: 1,720

Likes: 2

I hope its nothing serious but a metal knocking sound is never a good thing.

Did you check to see if there was any metal shavings in the oil when you changed it?

Mar 17, 2012 | 02:55 AM

#20

usmcdragon

Thread Starter

New User

Joined: Mar 2012

Posts: 10

Likes: 0

I put a magnet in the oil to see if there was anything and there wasn't.

Mar 17, 2012 | 02:58 AM

#21

Ironhand03

Posting Guru

Joined: Jul 2011

Posts: 1,720

Likes: 2

When you go to take a video of the truck running make sure you move the camera around too to try to isolate the noise. Sound tone can help give you a clue to what it is.

Also I would do a compression test if you can. I know you just changed the plugs so I doubt you want to do that again tho. lol

Mar 17, 2012 | 03:12 AM

#22

Ironhand03

Posting Guru

Joined: Jul 2011

Posts: 1,720

Likes: 2

This is why I asked if you had changed your plugs. But this was a mechanical sound that wouldn't go away.

Lets hope its not this bad for you tho.

Mar 17, 2012 | 03:16 AM

#23

usmcdragon

Thread Starter

New User

Joined: Mar 2012

Posts: 10

Likes: 0

Do you think the oil pump is bad and if so how can you test for that?

FTE Stories

Ford Trucks for Ford Truck Enthusiasts

Top 10 Ford Truck Tragedies

Joe Kucinski

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

Brett Foote

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Michael S. Palmer

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Verdad Gallardo

10 Best Ford Truck Engines We Miss the Most!

Joe Kucinski

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Brett Foote

2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!

Michael S. Palmer

10 Most Surprising 2026 Ford Truck Features!

Joe Kucinski

Top 10 Ford Trucks Coming to Mecum Indy 2026

Brett Foote

5 Best / 5 Worst Ford Truck Wheels of All Time

Joe Kucinski

Mar 17, 2012 | 03:23 AM

#24

Ironhand03

Posting Guru

Joined: Jul 2011

Posts: 1,720

Likes: 2

Oil pressure would be about the only way to tell.

Mar 17, 2012 | 06:07 AM

#25

scraprat

Lead Driver

Joined: Jan 2002

Posts: 8,624

Likes: 4,708

From: Itinerant

Quote:

Originally Posted by Ironhand03

That wont change anything. Most 40s will shear to a high 20 or mid 30 grade anyways.

Why do the they even bother putting oil recommendation for these trucks when apparently we can just grab any oil and dump it in instead of the recommended. Then wonder why theres a knock, it probably has nothing to do with it but still. Yea I know the oil is dark and oily feeling and all it will work in any moving engine part.

Mar 17, 2012 | 06:22 AM

#26

Ironhand03

Posting Guru

Joined: Jul 2011

Posts: 1,720

Likes: 2

Quote:

Originally Posted by scraprat

Well if you pay close enough attention there is several reasons.

Some engines have a 5-30 oil recommendation and then that same motor but the next year uses a 5-20 oil because of fuel economy. But a 20 is already so light they had to go to a Semi-synthetic to prevent it from over shearing.

Also weight of oil helps with noise but increases drag on parts and strain on the oil pump. Depending on the nature of the engine, even engine bearings have to be sized according to what oil is to be used.

Weight is only one factory tho and Ill take an oil with higher ZDDP and TBN (detergent additives) regardless of weight any day.