02-14-2017, 02:26 PM | #1 |
Senior Member
Join Date: Apr 2014
Location: Honolulu
Posts: 116
|
Rattles
Aloha,
Trying to figure out what is rattling under my car, especially when I slow down and downshift. It sound like the rods are hitting the bottom of the car. However I have been under the car and the rod seemed pretty tight. Anyone has any ideas? Trying to make the car has quiet as possible (but for that nice muffler sound). What are the most common or uncommon rattling parts on a Model A. |
02-14-2017, 02:29 PM | #2 |
Senior Member
Join Date: Mar 2016
Location: Lynden, WA
Posts: 1,564
|
Re: Rattles
Tail pipe?
|
Sponsored Links (Register now to hide all advertisements) |
|
02-14-2017, 02:46 PM | #3 |
BANNED
Join Date: May 2010
Location: Bucks County, PA
Posts: 11,454
|
Re: Rattles
A dry speedometer cable can make some crazy noises at certain speeds..
Rattles are common Your best bet is find a different way to duplicate it if possible when not moving.. a hubcap mallett is handy to use for tapping on things like an exhaust etc Last edited by Mitch//pa; 02-14-2017 at 07:49 PM. |
02-14-2017, 03:14 PM | #4 |
Senior Member
Join Date: Apr 2011
Location: Davenport, Iowa
Posts: 2,111
|
Re: Rattles
Wiggle the service brake cross shaft beneath the center crossmember. The bushings wear and allow the shaft to rattle against the lower frame rail upon hitting bumps. It's not a light rattle (such as brake rods), but a more substantial rattle/clunk. It is VERY common for these shafts to be loose in their brackets because the bushings are not all that easy to change. So, many "restorers" just ignore this phase of brake system rebuilding. Slop here also compromises braking efficiency = a double whammy!
If this isn't the cause of your noise, don't worry. There are only about a million other places where noises can (and do) originate in a Model A. Marshall |
02-14-2017, 04:26 PM | #5 |
Senior Member
Join Date: May 2010
Posts: 335
|
Re: Rattles
If you have engine pans, they are notorious for rattling. check to see whether a mounting ear is broken off.
|
02-14-2017, 04:47 PM | #6 |
Senior Member
Join Date: Feb 2011
Location: Lincoln, Nebraska
Posts: 1,909
|
Re: Rattles
Sponsored Links (Register now to hide all advertisements)
__________________
Dave / Lincoln Nebraska |
02-14-2017, 04:54 PM | #7 |
Senior Member
Join Date: Jul 2012
Location: California
Posts: 1,696
|
Re: Rattles
When that started happening on my otherwise silent driving fordor, it turned out the center main crank babbit was beginning to disintegrate. It only did it when decelerating or engine braking down a hill at first. I could have sworn (based upon the sound) that it was coming from under the car.
Eventually, the center main babbit failed completely and it meant an engine rebuild. That fixed the rattling sound under the car. |
02-14-2017, 06:22 PM | #8 | |
Senior Member
Join Date: May 2010
Location: Mpls, MN
Posts: 27,582
|
Re: Rattles
Quote:
It makes the noise only when going over a bump. My car has the split brake system used until late 28. |
|
02-14-2017, 07:39 PM | #9 |
Senior Member
Join Date: Apr 2011
Location: Milpitas, CA
Posts: 398
|
Re: Rattles
loose muffler baffle?
__________________
Bill Cilker, Jr Unrestored 190A Victoria 45B, 160B & 189A Victoria Association President |
02-14-2017, 08:56 PM | #10 |
Senior Member
Join Date: Jul 2011
Location: Southwestern Connecticut
Posts: 931
|
Re: Rattles
I have learned that the sound is not always where you think you hear it. Rattles travel in these machines. I was absolutely convinced that I had a rattle/clatter under my floorboards. After several weeks of searching it turned out to be the rods from the firewall to the radiator. The bracket on the radiator had broken loose and rod was bouncing around.
Ken
__________________
Style beats speed any day, and with a lot fewer tickets. |
02-15-2017, 01:33 AM | #11 |
Member
Join Date: Jun 2010
Location: Auckland New Zealand
Posts: 32
|
Re: Rattles
My 28 Phaeton turned out to be the drive tube clonking the curtain box under the floor???
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|