guess the noise? - TCCoA Forums
 
LinkBack Thread Tools
post #1 of 11 (permalink) Old 02-01-2004, 06:01 PM Thread Starter
 
Join Date: Feb 2004
Posts: 252
guess the noise?

ok i have this noise from my engine area, here are the clips, i know someon ehas had this and can tell me what it is, it only happens when i get the rpm's up there, so please take a sec and listen to the clips and HELP ME, cuz the niose is driving me up th wall!

http://members.cox.net/smitty1258/tbird93%20003.avi
http://members.cox.net/smitty1258/tbird93%20004.avi
http://members.cox.net/smitty1258/tbird93%20007.avi

Thanks,

Tyler
Sound-Xtreme
Sponsored Links
Advertisement
 
post #2 of 11 (permalink) Old 02-01-2004, 06:05 PM
Moderator
Moderator
 
JustinH's Avatar
 
Join Date: Jul 2002
Location: Austin, TX
Age: 37
Posts: 8,239
Send a message via AIM to JustinH
something hitting the fanblades?

Doesn't sound like cat heatshields, but might want to take a peek.
JustinH is offline  
post #3 of 11 (permalink) Old 02-01-2004, 06:26 PM Thread Starter
 
Join Date: Feb 2004
Posts: 252
nope nothing is hitting the fan blades, i will check the cat tomorrow

Tyler
Sound-Xtreme
Sponsored Links
Advertisement
 
post #4 of 11 (permalink) Old 02-02-2004, 01:04 AM
PostWhore
 
Join Date: Nov 2002
Location: SouthEastern PA
Posts: 1,112
I listened carefully to those videos. It sounds so familiar, but I can't quite put my finger on it. I have a couple questions, and a couple ideas.

Questions:

1) It seems like it only makes the noise when you are on the throttle a moderate to large amount. Does it make the noise at light throttle?

2) Does it do that only in park, or also when you are in neutral or drive? When you are going down the road, or no?

3) Is your induction system stock?

Possible causes:

1) Something hitting the floorpan, like the exhaust. It doesn't sound like cat heatshields, which I am all too familiar with. All the same, maybe it could be them too.

2) Exhaust leak (cracked header or something) ... sometimes they can sound pretty goofy.

3) Something in the valvetrain. I had a rocker arm bolt break once. The pushrod and rocker arm were just bouncing around like crazy inside the valve cover, and it sounded horrible. Kind of like your noise. But the car was definitely chugging along, and you could feel "hits" in the gas pedal. I think it's probably worth taking the valve covers off to see if a rocker arm is loose or a valve is bent or something.

4) Something stuck in your induction system. Since it seems to only make the noise when you are on the throttle pretty hard, I was thinking it might have something to do with the position of the throttle body or the amount of air getting sucked in. Like, maybe something in there is flapping around when a lot of air goes through.

5) If it only happens when at WOT, then maybe it has to do with the A/C clutch cutout. (You know, it releases the clutch when you floor it to reduce power losses.)

6) Maybe something in your tranny. It sounds a little bit like what happened to me the other day, when I was trying to get my car out of snow by rocking it. I accidentally put it in Park while the wheels were still moving, and it made a ratcheting sort of noise.

Sorry this was so wordy, but I am curious too! I hope it helps!

-------------------

Steve

Owner, 1990 Thunderbird SC, white w/ gray cloth
S_Mazza is offline  
post #5 of 11 (permalink) Old 02-02-2004, 03:37 AM
 
Join Date: Jan 2004
Posts: 6
it could be rod knock, but i'm leaning more towards main bearings since it only seems to happen upon exceleration, either way, time for a rebuild.
chickenlights is offline  
post #6 of 11 (permalink) Old 02-02-2004, 05:37 AM
PostWhore
 
seawalkersee's Avatar
 
Join Date: Jan 2004
Location: Outside KCMO
Age: 42
Posts: 1,566
Unless there is a problem with your torque converter...that is the sound of your lower end knocking. The mains knock on acceleration and rods knock when you let off of the throttle. When did you do your headgaskets? If you havent...its time fer a new engine.
seawalkersee is offline  
post #7 of 11 (permalink) Old 02-02-2004, 05:42 AM Thread Starter
 
Join Date: Feb 2004
Posts: 252
it happens in all park,N,Drive when the rpm climes above 3 usually, and when im driving it does it also when i give it hell, it had just started last week, and has been getting worse, it does not make any noise at light throttle, although when i start it in the mornings to go to work when it reves up when the engine first starts, it makes the noise real fast. induction is stock , removed the black box, got a k&n, thats all that has been done to it i took off the hoses to inspect for something like you siad yesterday and saw nothing. now about the main bearings, how do i check that? I know someone has had this problem before,lol, its driving me insane! btu how do i check the bearings? or the rod? im guessing that its not quite an easy thing to check? I replaced the head gaskets at around 90,000? any more ideas?


Tyler
Sound-Xtreme
post #8 of 11 (permalink) Old 02-02-2004, 09:22 AM
 
Join Date: Jan 2004
Posts: 6
you'll have to drop the oil pan to check the bearings
chickenlights is offline  
post #9 of 11 (permalink) Old 02-02-2004, 11:24 AM
Seasoned PostWhore
 
jk69cat's Avatar
 
Join Date: Jul 2003
Location: vernon hills, IL
Age: 42
Posts: 5,978
you could of washed a bearing with the headgaskets, has the front cover gasket ever been changed? it happens when when dont drop the pan and clean out the front journal when doing a front cover. defintely sounds like lower end.

64 ford galaxie -FE powered beast!- sleeping giant
69 cougar standard- 347/c6 -efi restomod, heidts prog 4 link heavily modified front, custom strutrods boxed lowers rollerperches 620 lowering springs! meier shock tower brace
96 f150 supercab lifted beast! 351 powered beast
87 shasta roadmaster 29ft travel trailer- pimpdaddy camping!
mn12 less!
jk69cat is offline  
post #10 of 11 (permalink) Old 02-02-2004, 11:19 PM
PostWhore
 
seawalkersee's Avatar
 
Join Date: Jan 2004
Location: Outside KCMO
Age: 42
Posts: 1,566
It will only get worse untilll it pops. Im tellin ya if the noise is in your engine compt. its the lower end. You can take a long dowell and push it to your ear. Press the lobe into the dowell and against the lower part of the block. When it starts to rattle you will hear it more. If you put the dowell at the top you will still hear it, but at the bottom you will HEAR it. Sorry fer the bad news .
seawalkersee is offline  
post #11 of 11 (permalink) Old 02-02-2004, 11:23 PM
PostWhore
 
Join Date: Nov 2002
Location: SouthEastern PA
Posts: 1,112
That's a good call about the dowel, it (or a long screwdriver or whatever) can really help you locate a noise. I hadn't thought of a lower end noise. Sorry I overlooked it. I would recommend that you use the noise-checking method with the dowel, but I would check the valve covers (or inside them) before you go tearing the bottom end apart.

(Sorry if I sounded like a know-it-all in my above post; I wasn't trying to.)

-------------------

Steve

Owner, 1990 Thunderbird SC, white w/ gray cloth
S_Mazza is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TCCoA Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome