RX7Club.com


Go Back   RX7Club.com > Generation Specific > 2nd Generation Specific (1986-1992)
Sign in using an external account
Register Forgot Password?
Register Photos FAQ Members Search Today's Posts Mark Forums Read VendorsUsed Cars TSB & Recalls Garage
Welcome to RX7Club.com

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread Display Modes
Old 12-24-07, 02:16 PM   #1
New Member
 
Trader Score: (0)

Join Date: Jun 2006
Location: Jersey
Posts: 14
Loud noise when driving over 30mph

Hey guys, I'm stumped. I drive a 1991 convertible with about 110k miles. At around 30 mph there is a reasonably loud hum that even overpowers the engine's noise. It gets louder and more pronounced as the car gains speed. I've noticed that letting up on the accelerator will slightly decreases the noise. Also, and this is what's really stumped me, is that when I'm turning left, the noise completely disappears. But as soon I let go of the wheel, the noise returns. I've checked the muffler and there were no holes or leaks. And I've been driving likes this for a month. I have not noticed any discernible difference in performance, handling or gas mileage. Any insight you guys could provide would be greatly appreciated. Happy holidays!
zingzhang182 is offline   Reply With Quote
Old 12-24-07, 02:20 PM   #2
Rotorite
 
Trader Score: (0)

Join Date: Oct 2007
Location: Phoenix AZ
Posts: 77
have you changed your tranny fluid? it may be the tranny, not likely but couldn't hurt to check.
RAWRX7 is offline   Reply With Quote
Old 12-24-07, 02:30 PM   #3
Banned. I got OWNED!!!
 
SpooledupRacing's Avatar
 
Trader Score: (0)

Join Date: Aug 2006
Location: Comstock Park, MI 49321
Posts: 3,717
Send a message via AIM to SpooledupRacing
Check the wheel bearings... normally that would sound like a bad front wheel bearing.. or a possible noisy rear diff..

The turning makes me think Wheel bearing though...

if you turn left it is possiby the right wheel bearing.. because when u turn left the force is applied to the right side of the car... this would load the pressure on the right wheel bearing cause this hum/growl
SpooledupRacing is offline   Reply With Quote
Old 12-24-07, 03:03 PM   #4
Banned. I got OWNED!!!
 
Delicious's Avatar
 
Trader Score: (0)

Join Date: Oct 2007
Location: Manteca, CA
Posts: 420
if theres a vibration with the hum, check rear diff... do rx7s use U-Joints?
Delicious is offline   Reply With Quote
Old 12-24-07, 04:01 PM   #5
Banned. I got OWNED!!!
 
phoenix7's Avatar
 
Trader Score: (0)

Join Date: Dec 2006
Posts: 26
Send a message via AIM to phoenix7
all good tips, also look into our suspension components to make sure everything is tight. Check your wheel balance too.
__________________
Great spirits have always found violent opposition from mediocrities. The latter cannot understand it when a man does not thoughtlessly submit to hereditary prejudices but honestly and courageously uses his intelligence.
-Albert Einstein
Too bad I didn't use my intelligence and got myself banned.
phoenix7 is offline   Reply With Quote
Old 12-24-07, 04:25 PM   #6
Rotorless
5 Year Member
 
rx7nerd's Avatar
 
Trader Score: (0)

Join Date: Dec 2007
Location: Comstock Park,MI
Posts: 362
Send a message via Yahoo to rx7nerd Send a message via Skype™ to rx7nerd
im gonna go with bad wheel bearings
rx7nerd is offline   Reply With Quote
Old 12-24-07, 06:09 PM   #7
That's notta sin.
 
YBNORML's Avatar
 
Trader Score: (0)

Join Date: Jan 2005
Location: Topeka, KS
Posts: 132
I had the same problem with my '89 vert. I slid into a curb and bent the front subframe. Passenger side front wheel is out at the top and in at the bottom-looking from the front. Is that negative caster?
I replaced the front subframe and it quit making the noise-almost like a roar.
When I turned to the right the noise would go away until the wheel straightened out.
__________________
There has always been a fine line between patience and procrastination.

Last edited by YBNORML; 12-24-07 at 06:13 PM. Reason: more info
YBNORML is offline   Reply With Quote
Old 12-25-07, 02:09 AM   #8
Canned. I got CORNED!
5 Year Member
 
Trader Score: (5)

Join Date: Mar 2007
Location: Appleton, WI
Posts: 1,000
Send a message via AIM to The Shaolin
Wheel bearing would be my guess.
__________________
1986 GXL - Big turbo project car
2000 Saturn SC1 (blown up, in storage)
1991 Chevrolet K1500
The Shaolin is offline   Reply With Quote
Old 12-25-07, 12:54 PM   #9
hondas suck hard
 
ibrakestuff's Avatar
 
Trader Score: (0)

Join Date: Sep 2007
Location: vancouver B.C.
Posts: 65
+1 on wheel bearing, makes me think that cause it makes more noise at higher speeds.correct me if im wrong but, suspention i would think would be all the time.
drive beside a fence and the noise will be easier to locate. works for me
ibrakestuff is offline   Reply With Quote
Old 12-25-07, 01:27 PM   #10
Clean.
5 Year Member
 
ericgrau's Avatar
 
Trader Score: (1)

Join Date: Mar 2005
Location: Huntington Beach, CA
Posts: 2,514
Ima guess wheel bearings. I had similar problem, though not as loud. Disappeared when i turned right and it was the right wheel bearing, IIRC. Or I might have it backwards. Anyhow I replaced the front wheel bearings on both sides, since I figured the good bearing probably didn't have too much longer to live anyway. I noticed a badly kinked grease seal spring in one. I couldn't see any problems with the bearings themselves. So if I or the P.O. followed the basic scheduled maintenance - clean with a solvent, let dry, inspect bearings, repack grease and replace grease seal - then maybe that would have been enough. I'll never know.

The Mazda dealer did not have OEM replacements, btw. You need the whole expensive hub or something. So I got the bearings and grease seals at the local auto store. There's inner and outer bearings (1 of each per wheel = 4 total), plus grease seals for the inner bearings.
__________________
1987 white NA RX-7

Last edited by ericgrau; 12-25-07 at 01:33 PM.
ericgrau is offline   Reply With Quote
Old 12-25-07, 02:12 PM   #11
Spinner
5 Year Member
 
super-rx7-71's Avatar
 
Trader Score: (5)

Join Date: Aug 2007
Location: Macon,GA
Posts: 118
I had a similar noise on my 240sx once and it turned out to be the diff leaked all the fluid out and was humming really loud the faster i went, by the time I found out what it was the diff was ruined.
super-rx7-71 is offline   Reply With Quote
Old 12-25-07, 02:26 PM   #12
Yo dawg, Im happy for you
 
RyosukeD's Avatar
 
Trader Score: (2)

Join Date: Jan 2006
Location: Corvallis, Oregon
Posts: 574
Send a message via AIM to RyosukeD
Quote:
Originally Posted by runscrappy_FC3S View Post
if theres a vibration with the hum, check rear diff... do rx7s use U-Joints?
Yes they do.
__________________
'91 FC Coupe

Quote:
Originally Posted by Samuel L. Jackson
English mother ******, do you speak it?
Quote:
Originally Posted by Mr. 8R6X7 View Post
So I pick this girl up around 11:45PM and take her to Dennys for some chicken strips.
RyosukeD is offline   Reply With Quote
Old 01-10-08, 12:31 PM   #13
New Member
 
Trader Score: (0)

Join Date: Jun 2006
Location: Jersey
Posts: 14
Hey guys, thanks for all the responses, I've actually been away this pas month so I haven't been able to check up on the thread. I'll check the wheel bearings, but how do I tell if they're the real problem?
zingzhang182 is offline   Reply With Quote
Old 01-10-08, 12:49 PM   #14
(blank)
5 Year Member
 
pfsantos's Avatar
 
Trader Score: (0)

Join Date: Nov 2005
Location: YYZ
Posts: 1,790
Front wheel bearings on our cars are maintenance items. They're supposed to be removed, cleaned, greased and reinstalled (and tightened with a proper pre-load). Once they're worn, this won't cure them and you'll still have play even after setting proper pre-load. The rears are not serviceable - once they're worn, you have to replace them, which involves pressing the old ones out from the hub.

Put one corner up at a time and spin the wheel. Listen for noise, check for play. Compare to the others. I left some things out since I hope you have the FSM and will read up on it (FSM in my sig.).

Could be something else but from what you said (increasing noise, while turning goes away, etc.) I'd first check the wheel bearings. After that, I'd check tires, steering linkages, balljoints, etc. This is a dangerous area to screw around with or let things wear out, so if you're not confident at any time, take it to a good pro, IMHO. GL.
__________________
Paulo
86 Mazda RX-7

RX-7 FSM, Parts Fiches, etc.
More RX-7 Reference info
pfsantos is offline   Reply With Quote
Old 01-10-08, 12:49 PM
RX7Club
Mazda RX7




Paid Advertisement


 
 
 
Reply

Tags
2006, 30, 30mph, car, engine, jetta, loud, make, makes, making, mph, noise, tdi, transmission, wheel

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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

Similar Threads
Thread Thread Starter Forum Replies Last Post
Loud noise from clutch? siguy2k 2nd Generation Specific (1986-1992) 3 11-12-07 10:58 PM
loud knocking noise pittbulls 2nd Generation Specific (1986-1992) 5 06-11-05 11:10 AM
Loud squeling noise vmb83 1st Generation Specific (1979-1985) 8 07-10-04 06:17 PM
l have a loud thumping noise or clunking noise when I come off my clutch. damigo 2nd Generation Specific (1986-1992) 10 01-26-04 01:50 AM
Loud clicking noise when turning steering weel when first start driving in AM allen 2nd Generation Specific (1986-1992) 0 10-21-01 08:38 PM


All times are GMT -5. The time now is 08:08 AM.
All content Copyright 2007 by Internet Brands, Inc.

Contacts

SEO by vBSEO ©2010, Crawlability, Inc.