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Offline From_Jonah

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Metallic Rattling Sound
« on: August 04, 2013, 10:17:35 PM »
So, when I'm taking off and when I reach certain speeds/when the engine is under a strain (and more or less in 2nd and 3rd gear) there's a really metallic sounding rattle coming from what I believe to be outside the car. I have no transmission slip at all. I'm thinking possibly a flexplate bad but idk how to tell? It sounds almost like valve rattle (which I have) but it's waay to loud for that I think. Anyone have an idea?
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Offline dga57

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Re: Metallic Rattling Sound
« Reply #1 on: August 04, 2013, 10:19:59 PM »
Have you checked your exhaust system to make sure you haven't lost a hanger?
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Offline From_Jonah

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Re: Metallic Rattling Sound
« Reply #2 on: August 04, 2013, 10:24:22 PM »
Yessir. My exhaust is solid. It's puzzling my and I can't figure out the best way to pinpoint it.
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Offline 74 PintoWagon

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Re: Metallic Rattling Sound
« Reply #3 on: August 04, 2013, 10:27:47 PM »
If nothing on the outside is rattling it could be the converter, loose fins will rattle big time took me a while to figure that one out once..
Art
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Offline From_Jonah

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Re: Metallic Rattling Sound
« Reply #4 on: August 04, 2013, 10:37:24 PM »
Hmm. Well I drilled out the core of the converter a while back and it was doing it beforehand. About the same as it is now.
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Offline 74 PintoWagon

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Re: Metallic Rattling Sound
« Reply #5 on: August 04, 2013, 11:42:29 PM »
Hmmm, not sure what you mean by drilled out the core???, I'm talking about the vanes inside, they can come loose if not furnace brazed and they do rattle.
Art
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Offline From_Jonah

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Re: Metallic Rattling Sound
« Reply #6 on: August 04, 2013, 11:55:36 PM »
Maybe we're talking about two different converters  ??? I drilled out the cor of my catalytic converter. It was clogged up.
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Offline tbucketjack

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Re: Metallic Rattling Sound
« Reply #7 on: August 05, 2013, 12:44:45 AM »
Could this be ignition pinging when under load? Check your timing and put in a little higher octane gas.

Offline Pinto5.0

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Re: Metallic Rattling Sound
« Reply #8 on: August 05, 2013, 12:52:50 AM »
Could this be ignition pinging when under load? Check your timing and put in a little higher octane gas.

I was thinking this as well. Mine started doing it with my new carb & backing the timing down hasn't solved it.
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Offline From_Jonah

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Re: Metallic Rattling Sound
« Reply #9 on: August 05, 2013, 07:23:53 AM »
Hmm. Maybe so?? I'll give it a shot anyway. I'll try to remember to take a recording this afternoon and I'll post a video link so maybe y'all can hear it.
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Offline 74 PintoWagon

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Re: Metallic Rattling Sound
« Reply #10 on: August 05, 2013, 08:32:19 AM »
Maybe we're talking about two different converters  ??? I drilled out the cor of my catalytic converter. It was clogged up.
Ok guess we were, I was talking about the torque converter, LOL..
Art
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Offline 74 PintoWagon

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Re: Metallic Rattling Sound
« Reply #11 on: August 05, 2013, 08:35:59 AM »
Could this be ignition pinging when under load? Check your timing and put in a little higher octane gas.
Possible, but pinging don't really sound metallic though???.
Art
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Offline 74 PintoWagon

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Re: Metallic Rattling Sound
« Reply #12 on: August 05, 2013, 08:38:23 AM »
I was thinking this as well. Mine started doing it with my new carb & backing the timing down hasn't solved it.
Is the jetting the same as the old carb?, sounds like it could be lean??..
Art
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Offline From_Jonah

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Re: Metallic Rattling Sound
« Reply #13 on: August 05, 2013, 09:01:02 AM »
Ok guess we were, I was talking about the torque converter, LOL..

OOOOH haha. Mines a manual actually so I guess that's not it. I need to get it up on a lift and see of I can find anything else that could be loose or something.
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Offline Pinto5.0

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Re: Metallic Rattling Sound
« Reply #14 on: August 05, 2013, 09:04:06 AM »
Is the jetting the same as the old carb?, sounds like it could be lean??..

I changed the EGR plate gasket to rid myself of the vacuum leak I had but still haven't got the carb dialed in yet.  This thing is driving me up the wall.
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Offline 74 PintoWagon

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Re: Metallic Rattling Sound
« Reply #15 on: August 05, 2013, 10:16:50 AM »
OOOOH haha. Mines a manual actually so I guess that's not it. I need to get it up on a lift and see of I can find anything else that could be loose or something.
Well, guess that eliminates that theory then, LOL...
Art
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Offline 74 PintoWagon

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Re: Metallic Rattling Sound
« Reply #16 on: August 05, 2013, 10:21:08 AM »
I changed the EGR plate gasket to rid myself of the vacuum leak I had but still haven't got the carb dialed in yet.  This thing is driving me up the wall.
If it's identical to the old one and adjusted the same it should just bolt on and go I would think?, maybe something is different inside from the old one??..
Art
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Offline krazi

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Re: Metallic Rattling Sound
« Reply #17 on: August 05, 2013, 07:47:31 PM »
check the fuel tank straps. mine came loose once.
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Offline From_Jonah

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Re: Metallic Rattling Sound
« Reply #18 on: August 05, 2013, 10:28:35 PM »
check the fuel tank straps. mine came loose once.

Okay, cool. I'll give it a shot.
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Offline From_Jonah

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Re: Metallic Rattling Sound
« Reply #19 on: August 05, 2013, 11:23:18 PM »
Here's the video I made of it. It's kinda faint but I think y'all should be able to hear it well enough to know what I'm talking about.

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Offline 74 PintoWagon

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Re: Metallic Rattling Sound
« Reply #20 on: August 06, 2013, 08:39:31 AM »
Hmmm, didn't sound like pinging at all more like something's loose?, but then again my speakers are getting bad so I could be wrong?..
Art
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Offline dga57

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Re: Metallic Rattling Sound
« Reply #21 on: August 06, 2013, 10:47:15 AM »
This is going to sound ridiculous, but I experienced a similar sound in my '72 Squire wagon after folding the rear seat down to haul a rear bumper and then putting it back into the upright position.  Even though the latch appeared to be secure, it was allowing enough vibration to create a rattle under certain conditions.  I drove myself crazy looking around on the outside of the car (that's where it sounded like it was coming from) until I stumbled onto it!
Dwayne :)
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Offline HOSS429

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Re: Metallic Rattling Sound
« Reply #22 on: August 06, 2013, 11:17:16 AM »
the rear seat latch rattles on both my pintos ..  when i first got the 80 pinto one of the first things i did was to fix the drivers sun visor .. the shaft had broken so i JB welded a piece of stud to hold it in place ..  after fixing a few other things so i could drive it some it developed a rattle under the dash i thought .i pulled the glove box .. the radio .. the speaker .. all the heating duct work i could reach .. tightened up the exhaust and fixed every loose thing i could shake .. still had that annoying buzz of a rattle at speed ...  i was about to the point of hiring some kid to find the noise .. i took off down the street one day with the sun glaring in my eyes ... i reach up and swing down the sun visor  ... to my surprise no more rattle ..i cant hear your video here at work .. i`ll play it at home tonite ...

Offline 74 PintoWagon

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Re: Metallic Rattling Sound
« Reply #23 on: August 06, 2013, 11:32:27 AM »
It's amazing how sound can travel through a vehicle.
Art
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Offline From_Jonah

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Re: Metallic Rattling Sound
« Reply #24 on: August 06, 2013, 12:50:26 PM »
It's always what you never think it would be haha. And yeah. It does sounds like something loos sort. I guess I'll just have to try and go through it and find anything that might be rattling  :P
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Offline 74 PintoWagon

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Re: Metallic Rattling Sound
« Reply #25 on: August 06, 2013, 01:44:13 PM »
Yeah, and start looking in an area you'd least think it would come from, probably save a bunch of time, LOL..
Art
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Offline 71HANTO

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Re: Metallic Rattling Sound
« Reply #26 on: August 06, 2013, 02:16:28 PM »
Have you checked your exhaust system to make sure you haven't lost a hanger?
I had a Mustang that had the same sounding issue. Under load the engine would torque over enough that the exhaust pipe would contact a frame rail. A little crowbar messaging fixed the problem. You might also want to check your motor mounts. I have seen where an engine with bad motor mounts torqued over enough that the fan blade contacted the fan shoud.
 
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Offline From_Jonah

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Re: Metallic Rattling Sound
« Reply #27 on: August 06, 2013, 06:42:44 PM »
Ahhh, okay. I'd not even though of the motor mounts. How would I go about checking the motor mounts? I'd think i could see where they were physically broken.
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Offline 71HANTO

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Re: Metallic Rattling Sound
« Reply #28 on: August 06, 2013, 07:12:42 PM »
Ahhh, okay. I'd not even though of the motor mounts. How would I go about checking the motor mounts? I'd think i could see where they were physically broken.
You can check them with another person. Here is the drill...have someone (you trust) start the car, put it in Drive, WITH THE BRAKES ON including the Emergency brake. Have them slowly rev the engine. STAND ON EITHER side of the car and NOT IN FRONT! The engine will want to twist to one side (can't remember which side). If the mount pulls apart, you have a bad mount.
 
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Offline From_Jonah

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Re: Metallic Rattling Sound
« Reply #29 on: August 06, 2013, 11:17:36 PM »
Okay awesome. Hopefully and can try that out in the next couple days. In my first post I said that it was doing it when I got it but now that I think about it, I think it started later. I just can't remember when for sure. 
1977 wagon - baby blue full restoration project.

1980 wagon - (77 front clip) converted to cruising wagon. (Sold in 2015. Canít find her again.)