Knock under left foot - Ford Bronco Forum
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post #1 of 34 (permalink) Old 11-13-2012, 01:43 PM Thread Starter
I did done broke it
 
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Knock under left foot

I have a strong knock coming from what feel like right below my left foot. Goes away when I hit/tap the brakes. Usually increases in strength and sound with speed. What I find incredibly odd (and worrysome) is it seems to have gotten softer after I put seafoam in the oil yesterday. I've had a few friends with me and hear it and none of them say its a engine knock. I've looked under the Bronco a few times and nothing seems out of place...I've rotated the front driveshaft by hand and I didn't feel any bad spots....very smooth...I was thinking maybe a hub is stuck but I don't know what to look for if I were to pull it. Ideas?

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post #2 of 34 (permalink) Old 11-13-2012, 01:47 PM
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it's in your mind that the sound changed since you put seafoam in the oil.

it's a bad radius arm bushing.

2005 Chevy Venture. 1997 Acura TL. $500 beater. 1994 Chevy Caprice.
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New nuts are in the plan.
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post #3 of 34 (permalink) Old 11-13-2012, 01:52 PM Thread Starter
I did done broke it
 
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No I'm not even joking...its nowhere near as loud or hard as it used to be...but I'll go look at the bushings...I saw something about that while searching but it just didn't seem right so I made a thread...will I need a alignment badly or will the Bronco still be drivable after this? I can live with it pulling alittle....but if it totally messes with it the bushings may have to wait as I can in no way afford an alignment

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post #4 of 34 (permalink) Old 11-13-2012, 01:53 PM
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Originally Posted by TheUnforgiven View Post
it's in your mind that the sound changed since you put seafoam in the oil.

it's a bad radius arm bushing.

What he said. It's the placenta affect

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post #5 of 34 (permalink) Old 11-13-2012, 01:56 PM
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Originally Posted by defcon5 View Post
What he said. It's the placenta affect
you mean placebo right?

Pyro chill....out....deep breaths. the bushings are an easy fix.

anytime you change out suspension/steering parts you should get the alignment checked at the very least. that's why you inspect ALL the parts, replace whats needed BEFORE you get an alignment.

2005 Chevy Venture. 1997 Acura TL. $500 beater. 1994 Chevy Caprice.
Quote:
Originally Posted by "Bronco" John Galt View Post
New nuts are in the plan.
"Kids, they see the good in everything and through their eyes, they open ours." - Hank Davis

"To be easily amused is to live most of your life smiling."
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post #6 of 34 (permalink) Old 11-13-2012, 01:59 PM Thread Starter
I did done broke it
 
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Eh I'm just a little freaked by the Bronco right now because my dad is helping me pay $3K for a truck that seems to be making a new noise everyday

As long as I got you guys here I got one more question...I'm getting that white sludgy crap on my oil cap...is that just a bad cap or something? Nothing on the dipstick or anything just the cap

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post #7 of 34 (permalink) Old 11-13-2012, 02:01 PM
Roller rockers are gay
 
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Its not a big deal. i saw that A LOT in the winter when i was wrenching for a living. My car did it too when i was not highway driving.

Go change the oil, the pcv valve (with a Ford valve) and stop freaking out.

Get used to noises that come and go, you're driving a truck that is 23 YEARS old....and get used to fixing your own shit, or it's going to put you in the poorhouse.

2005 Chevy Venture. 1997 Acura TL. $500 beater. 1994 Chevy Caprice.
Quote:
Originally Posted by "Bronco" John Galt View Post
New nuts are in the plan.
"Kids, they see the good in everything and through their eyes, they open ours." - Hank Davis

"To be easily amused is to live most of your life smiling."
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post #8 of 34 (permalink) Old 11-13-2012, 02:07 PM Thread Starter
I did done broke it
 
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Oh I'm fine with fixing stuff...my S10 Blazer taught me that.

As for the PCV valve...is Motorcraft Ford's only part brand? Or are there others?

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post #9 of 34 (permalink) Old 11-13-2012, 02:07 PM
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Quote:
Originally Posted by TheUnforgiven View Post
you mean placebo right?

Pyro chill....out....deep breaths. the bushings are an easy fix.

anytime you change out suspension/steering parts you should get the alignment checked at the very least. that's why you inspect ALL the parts, replace whats needed BEFORE you get an alignment.
No I really mean the placenta affect.
You know your at the hospital and you and your wife are knee deep in placenta, and you perceive that a baby is going to ruin your life when in reality your life is just getting started

Just like his knock, he is all worried when in fact there is nothing to be worried about.

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post #10 of 34 (permalink) Old 11-13-2012, 02:12 PM
Roller rockers are gay
 
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I can't say i've ever heard that.....you're a strange fawker defcon.

Pyro the Ford pcv valve is the best you'll find. the aftermarkets are junk.

2005 Chevy Venture. 1997 Acura TL. $500 beater. 1994 Chevy Caprice.
Quote:
Originally Posted by "Bronco" John Galt View Post
New nuts are in the plan.
"Kids, they see the good in everything and through their eyes, they open ours." - Hank Davis

"To be easily amused is to live most of your life smiling."
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post #11 of 34 (permalink) Old 11-13-2012, 02:15 PM
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Originally Posted by TheUnforgiven View Post
I can't say i've ever heard that.....you're a strange fawker defcon.

Pyro the Ford pcv valve is the best you'll find. the aftermarkets are junk.
I just made it up, but thanks for the compliment

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post #12 of 34 (permalink) Old 11-13-2012, 02:16 PM
Roller rockers are gay
 
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o_O I think you should lay off the sauce.

2005 Chevy Venture. 1997 Acura TL. $500 beater. 1994 Chevy Caprice.
Quote:
Originally Posted by "Bronco" John Galt View Post
New nuts are in the plan.
"Kids, they see the good in everything and through their eyes, they open ours." - Hank Davis

"To be easily amused is to live most of your life smiling."
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post #13 of 34 (permalink) Old 11-13-2012, 02:30 PM Thread Starter
I did done broke it
 
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So motorcraft then? Online store for both Advance and NAPA don't have them unless I'm blind...please don't tell me I have to go to Oreillys

Surviving is winning. Everything else is bullshit. Whatever it takes, kid. Survive.

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post #14 of 34 (permalink) Old 11-13-2012, 02:37 PM
Roller rockers are gay
 
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Just go to your local Ford dealer and buy one.

2005 Chevy Venture. 1997 Acura TL. $500 beater. 1994 Chevy Caprice.
Quote:
Originally Posted by "Bronco" John Galt View Post
New nuts are in the plan.
"Kids, they see the good in everything and through their eyes, they open ours." - Hank Davis

"To be easily amused is to live most of your life smiling."
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post #15 of 34 (permalink) Old 11-13-2012, 04:35 PM
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Check ROCKAUTO.COM they carry a lot of Motorcraft stuff with very good prices.
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post #16 of 34 (permalink) Old 11-13-2012, 04:48 PM
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Its most likely as TheUnforgiven said, raidus arm bushing. Driving conditions change how intense it is. A badly warped rotor and a bad bushing will make you think the whole thing is about to blow! Brakes draging on a slightly warped rotor will give you a constant vibration. Its directly under your left foot because the closest body mount is there and its transfering through that to the body.

Doug
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1965 Buick Rivera-401 Nailhead V8-Sunday Driver
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post #17 of 34 (permalink) Old 11-13-2012, 04:56 PM
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Dayum Defcon !!! ive been called bat shyt crazy before, You might be Super twin turbo injected bat shit crazy with a reverse spiral twist !
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post #18 of 34 (permalink) Old 11-13-2012, 05:09 PM
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Dayum Defcon !!! ive been called bat shyt crazy before, You might be Super twin turbo injected bat shit crazy with a reverse spiral twist !
Oh shit that made me laugh, thanks

On a more serious note, when I did my pan gasket and other stuff, apparently I did not get the motor set back down like it was supposed to be. Anyway the drivers side motor was touching the firewall, and drove me crazy. It was not so much a knock but just reverberating throughout the whole truck.

1992 Bronco XLT, 351w. 8 inch lift SAS on tons!

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post #19 of 34 (permalink) Old 11-13-2012, 06:42 PM
Roller rockers are gay
 
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Quote:
Originally Posted by KTO17 View Post
Its most likely as TheUnforgiven said, raidus arm bushing. Driving conditions change how intense it is. A badly warped rotor and a bad bushing will make you think the whole thing is about to blow! Brakes draging on a slightly warped rotor will give you a constant vibration. Its directly under your left foot because the closest body mount is there and its transfering through that to the body.
no they won't.

2005 Chevy Venture. 1997 Acura TL. $500 beater. 1994 Chevy Caprice.
Quote:
Originally Posted by "Bronco" John Galt View Post
New nuts are in the plan.
"Kids, they see the good in everything and through their eyes, they open ours." - Hank Davis

"To be easily amused is to live most of your life smiling."
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post #20 of 34 (permalink) Old 11-13-2012, 06:58 PM
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It almost has to be the RA bushings. Click this & read the caption:



Regardless of what you find there, check the engine mounts & the #1 crossmember rivets while you're under it.

.
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