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Strange thumping noise from from end?

J

jedi

Guest
Strange thumping noise from front end?

I have a wierd thumping noise from my front left that just started up. I thought it might be a brake calper loose as I hear it when slow, and feel a thump when stepping on the brakes. Today it got much worse. Now when driving at slow speeds I hear it all the time, regardless of in a turn or driving straight. If I speed up it goes away. I can feel and hear the tump. Any ideas? It's a 95 LT1 automatic. Car has been in storage for about 5 months and I had a high pressure hose replaced for my A/C 2 weeks ago.
Jedi
 

gmjunkie

Well-known member
Joined
Nov 11, 2004
Messages
4,547
Location
Old Fort NC/Vero Beach FL
Corvette
03 Z-51,78 L82 Coupe
I have a wierd thumping noise from my front left that just started up. I thought it might be a brake calper loose as I hear it when slow, and feel a thump when stepping on the brakes. Today it got much worse. Now when driving at slow speeds I hear it all the time, regardless of in a turn or driving straight. If I speed up it goes away. I can feel and hear the tump. Any ideas? It's a 95 LT1 automatic. Car has been in storage for about 5 months and I had a high pressure hose replaced for my A/C 2 weeks ago.
Jedi
Cracked Rotor,bad Wheel bearing!!;shrug ;shrug
 
J

jedi

Guest
bad tire ?

Glenn
:w

Better not be. Eagle GTs $300 last summer. Tread looks like it's in great shape. It's not a vibration but a hard thump at low speed or when pressing brake pedal.
Jedi
 

G Winter

Well-known member
Joined
Aug 21, 2004
Messages
2,177
Location
NW Iowa
Corvette
1990 red convert 6 sp
Sounds brake it could be related. Like junk said rotor. If not rotor or wheel bearing then tire. Check the lug nuts, you could have a lose wheel. Any pulse in the brake pedal? Any wobble in the steering wheel ? New tires have been known to be bad.


Glenn
:w
 
Joined
Apr 4, 2003
Messages
174
Location
So Cal
Corvette
1996 LT4 Collector Edition
Flat spot on just that one tire? Doesn't seem likely, but.... ;shrug
 
J

jedi

Guest
Well I went to drop the car off at my local shop and on the way there about 5 miles away, I could not hear the noise;shrug . Now I am thinking it might have been my key fob hitting the dash board. Either that or the part has to be warm to start making the noise. I should hear from the shop tomorrow. I will let you guys know what they say.
 
Joined
Feb 25, 2003
Messages
887
Location
Clarksville, Tennessee
Corvette
1979 Bright Red L-82
My old C-4 was doing that and it turned out to be the U-Joint on the short shaft was bad.....
 
J

jedi

Guest
Good news bad news

So here is what the shop said. The bolts on my brake calipers were all finger tight. I did my brakes last year about this time. I was pretty sure I tightend all the bolts to the apropriate force. Pretty sure I even used my tourqe wrench. Drove the Vette all summer, even did a track day. So what could cause the bolts to back themselves out after a year?
 
S

speedmaster4

Guest
. So what could cause the bolts to back themselves out after a year?

failure to clean bolt threads with solvent (brake cleaner is ok,but gotta really blast em till it runs off) or insufficient application of loctite....going back to retorque after loctite has taken initial set is also a bad.
 

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