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Old 11-16-2004, 12:46 AM   #1
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Engine knocking sound (video inside)

Alright so my engine makes this noise (see video)

any ideas what it could be?
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Old 11-16-2004, 01:11 PM   #2
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yeh, mine sounded like that once it hit 2000 rpms, until i had to replace the engine...
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Old 11-16-2004, 01:15 PM   #3
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Ha..you sent that to me last night, I dl it..just never listened. I have no idea what it might be though...
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Old 11-16-2004, 01:41 PM   #4
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Check the PCV valve first. pull the valve out of the passanger side Valve cover and then place your thumb over the hole on the bottom of the PCV valve and rev the car and see if it is still rattling
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Old 11-16-2004, 01:43 PM   #5
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Do you have roller rockers?
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Old 11-16-2004, 02:22 PM   #6
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Quote:
Originally Posted by pete
Do you have roller rockers?
Its a stock engine
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Old 11-16-2004, 03:19 PM   #7
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well I went to take vid of what my engine sounds like, but I found antifreez all under the front of my car... cause 1. check the hose and water pump) < for me, but Brent, sounds like you need to get that checked out.. or wait till your 4.2 is done
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Old 11-16-2004, 07:46 PM   #8
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Sounds like a bent rod or a loose roller rocker.
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Old 11-16-2004, 11:15 PM   #9
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Quote:
Originally Posted by CraZy6
Sounds like a bent rod or a loose roller rocker.
But would it not do that all the time if it was the case? It doesnt make that noise all the time.. i dunno me and brandon(spectorV) are going to change the plugs(see if I am running rich/lean or if they are gapped to much) and do a few othe rmainteance things monday probably. so we will see
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Old 11-17-2004, 06:21 AM   #10
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A loose rocker would make noise all the time and the cars performance would suffer badly
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Old 11-17-2004, 06:27 AM   #11
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Here is the best thing to isolate the noise. Get a hose about 2 1/2 ft long, put one end to your ear and the other to the engine. With the engine running and the car on ramps or jack stands. Start first at the valve covers then the upper intake, then move down to the oil pan. You will be able to better isolate where the sound is coming from.

Did you do the PCV check????? If the sound is coming from the oil pan you are screwed. You migh get lucky and only have a collapsed lifter which will be heard in the valve covers
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Old 11-17-2004, 09:46 PM   #12
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the engine knocking sound

Where is the sound coming from up top or down low?
If u let your car sit at idel what is does your rpm do and what does your oil pressure gauge do?
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Old 11-17-2004, 10:05 PM   #13
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Quote:
Originally Posted by TheMustangKid
Where is the sound coming from up top or down low?
If u let your car sit at idel what is does your rpm do and what does your oil pressure gauge do?
Oil Pressure is fine and it doesnt make this noise at idle.. .only when you give it gas or are going down the interestate and have your foot constantly on the gas

^ That leads me to believe its the cats which is what I hope for
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Old 11-17-2004, 10:08 PM   #14
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has there been any raw fuel dripping out the tail pipes?
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Old 11-17-2004, 10:35 PM   #15
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Quote:
Originally Posted by 232stang
has there been any raw fuel dripping out the tail pipes?
not that I can see
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Old 12-02-2004, 09:06 PM   #16
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How Many Miles Have You Put On Your Car Since You Got It? Sorry If I Sound Like A Dick But Judging By The Way You Were Revving Your Motor In The Clip It Sounds Like You Have A Lead Foot But I May Be Wrong. But You May Have Accidentally Overrevved Your Motor At One Point And Had A Valve Bend Making It Get Stuck Open And The Piston Comes Up And Smacks It Causing It To Close Again. I Know Mustangmike524 From School And His Did The Same Thing Resulting In A New Motor Like He Said. So You Should Probly Have That Checked Out. I Have Heard Of Cases Like This With Eagle Talons And The Valve Shot Through The Hood.
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Old 12-02-2004, 09:08 PM   #17
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Hehe, Brent has a heavy foot. O..and 89'Five-O, you don't have to capitalize the first letter of each word...
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Old 12-02-2004, 11:41 PM   #18
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He Didnt. It's An All Caps Filter! See! I'm Typing In All Caps.
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Old 12-02-2004, 11:49 PM   #19
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Haha, O
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Old 12-03-2004, 12:32 AM   #20
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Quote:
Originally Posted by 89'FIVE-O
How Many Miles Have You Put On Your Car Since You Got It? Sorry If I Sound Like A Dick But Judging By The Way You Were Revving Your Motor In The Clip It Sounds Like You Have A Lead Foot But I May Be Wrong. But You May Have Accidentally Overrevved Your Motor At One Point And Had A Valve Bend Making It Get Stuck Open And The Piston Comes Up And Smacks It Causing It To Close Again. I Know Mustangmike524 From School And His Did The Same Thing Resulting In A New Motor Like He Said. So You Should Probly Have That Checked Out. I Have Heard Of Cases Like This With Eagle Talons And The Valve Shot Through The Hood.
Alright.. well wouldnt that do it all the time if that was the case?

And for the love of god hit your caps button
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