Popping noise - CV joint?

General discussion forum about the 240sx, and a great place to introduce yourself to the board!
joes240
Posts: 80
Joined: Sun May 11, 2003 5:54 pm
Contact:

Post

My `93 240 SX (auto transmission) makes a weird popping noise when going in reverse with the wheel turned to the right pretty much every time. It also did this noise tonight when I had to slam on the brakes.

A friend told me it might be something called a CV joint. How much would this be to fix, AND is it something I need to really worry about causing further damage?

Thanks in advance folks!


User avatar
SmithSR
Posts: 5021
Joined: Sun Feb 23, 2003 3:16 pm
Car: 240sx

Post

worry, then get it repaired immediately. If the popping noise is indeed from the CV joint, then the boot covering the joint has cracked and the grease which normally lubricates the joint has been tossed out. You now have a joint working with no lubricant. Would you run your engine with no oil? A good shop will replace the entire shaft for ABOUT $130-$150 per side(your CV shafts are your car's drive axles), WITH warranty. Be sure to find out about warranty. Do not get a replacement boot. This will not fix the problem.

joes240
Posts: 80
Joined: Sun May 11, 2003 5:54 pm
Contact:

Post

The car's not under warranty, bought it used. Would that estimated price be with a warranty only, you mean?

joes240
Posts: 80
Joined: Sun May 11, 2003 5:54 pm
Contact:

Post

Also, being that it only does this while the wheel is turned to the right and going in reverse, is it as critical?

DAEDALUS
Posts: 5421
Joined: Mon Jul 22, 2002 8:50 pm
Car: 1990 Infiniti Q45

Post

My first guess is bad tension rod bushing. I think you have a choice of replacing the entire rod or just the bushing. One way you'll pay more for parts, the other way you might pay more for labor. Always critical to replace worn parts. Components are designed to work together as a system. When one fails it places more stress on other components and they'll start to fail sooner too. A bad tension rod bushing, for instance, would probably cause your tire to wear faster and your wheel bearing to fail sooner than normal.

User avatar
SmithSR
Posts: 5021
Joined: Sun Feb 23, 2003 3:16 pm
Car: 240sx

Post

I meant the warranty on the new CV Shaft. find a shop that will warranty the parts they install and the labor. Thats how my shop does it. Where do you live??

If it turns out to be the CV shaft, then no matter when it happens to make the noise, it's still working with NO grease. That's never good.

joes240
Posts: 80
Joined: Sun May 11, 2003 5:54 pm
Contact:

Post

I live in the Shenandoah Valley of Virginia. You're in Seattle, hmm, your shop's a little far away.

Well, it will be a few weeks before I can scrape together the dough to get it fixed. That and the shifting problem I'm having require my immediate attention.

What's the worst that can happen? Will my wheel fall of while going down the road, will it lock up, or just continue to grind away the joint until I get it fixed?

User avatar
SmithSR
Posts: 5021
Joined: Sun Feb 23, 2003 3:16 pm
Car: 240sx

Post

I guess it all depends on what is really wrong with your car. This should be job #1 to find out what exactly is making the noise.

joes240
Posts: 80
Joined: Sun May 11, 2003 5:54 pm
Contact:

Post

Is it something I can check out myself to determine what the problem is? I'm no car genius, but I'm learning.

User avatar
SmithSR
Posts: 5021
Joined: Sun Feb 23, 2003 3:16 pm
Car: 240sx

Post

yeah man, crawl under there and take a good look around. See if you can find any parts that are clearly crapped out. Seriously, Daedalus could be right in his prediction of the problem, and popping noises can come from alot of different parts. If you dont see anything out of the ordinary, take it to a reputable shop that wont charge you to take a peak underneath your car.

joes240
Posts: 80
Joined: Sun May 11, 2003 5:54 pm
Contact:

Post

Thank you for your advice guys.

If I wanted to check out the CV joint itself, where would I look exactly? =) I mean, is it directly behind the rotor or anything, or harder to get to?

User avatar
SmithSR
Posts: 5021
Joined: Sun Feb 23, 2003 3:16 pm
Car: 240sx

Post

just take a peak under there and notice your two axle shafts. at each end of a CV shaft there is a CV joint, which is usually covered by a boot.

joes240
Posts: 80
Joined: Sun May 11, 2003 5:54 pm
Contact:

Post

Thank you much for your insight. Greatly appricated, dude.

User avatar
SmithSR
Posts: 5021
Joined: Sun Feb 23, 2003 3:16 pm
Car: 240sx

Post

No sweat man :bearchug

Meantime
Posts: 1379
Joined: Thu May 08, 2003 3:51 am

Post

There's one problem with all of this: the 240 doesn't have CV joints. It has axle shafts. So don't worry about torn boots (unless it's your steering rack boots...that's another story).

I posted on your technical thread as well (same thread). Check tension rod bushings as Daedalus recommended and also I suggest inspect the rear brake pads, as they have sometimes caused strange noises in reverse on my 240 when they get worn down.

Meantime
Posts: 1379
Joined: Thu May 08, 2003 3:51 am

Post

Retraction - I'm wrong about the CV's apparently (see the technical thread). That could be the ticket after all.

User avatar
ricebike
Posts: 3381
Joined: Sat Feb 15, 2003 7:03 pm
Car: 1989 240sx se 5spd (donated to my brother in law)
2002 Quest
2005 Altima
Location: CNJ

Post

agh, u double-postin' whore! i just saw you're ? in tech thread... joe, j/k

LaureltheQueen
Posts: 447
Joined: Wed May 07, 2003 6:23 pm

Post

Yeah, rwd cars dont have Constant Velocity joints. I got a bit confused with this thread when I opened it. If you're curious as to what one looks like though, IM me, I have a ton of pictures from when we replaced both on my friend's civic wagon. :)

User avatar
b240
Posts: 818
Joined: Sat Nov 02, 2002 1:18 pm

Post

Its your bushings man , you can get some whitelines from http://www.pdm-racing.com .

User avatar
SmithSR
Posts: 5021
Joined: Sun Feb 23, 2003 3:16 pm
Car: 240sx

Post

Laurel, please clarify your statement about RWD not having CV or CV type axle shafts. call em what you want, half shafts, CV shafts, CV axles, whatever. Lots of cars, including the old subaru you said you drive use a CV shaft drivetrain. In most all cases a car or truck with independent suspension uses some type of CV shaft. CV shafts are best known for their use in fwd vehicles, but are used in countless applications. Porsche uses them, so do mustang Cobras. There are still some solid axle rear wheel drive cars, but more and more are using CV style drive shafts.

Meantime
Posts: 1379
Joined: Thu May 08, 2003 3:51 am

Post

Yeah, I peeked under the 240 after reading this thread and spotted them myself. I feel like a moron, especially considering I've owned 2 of these things...ach.

The Camaro has a solid axle, and that fact becomes readily apparent when you're accelerating hard over a bump. It feels like someone gives the car a swift kick in the a$$.

LaureltheQueen
Posts: 447
Joined: Wed May 07, 2003 6:23 pm

Post

sorry. I meant cv shafts like on hondas. the one that goes straight from the transaxle and hooks up to your strut assembly/tie rod, etc. :o

User avatar
SmithSR
Posts: 5021
Joined: Sun Feb 23, 2003 3:16 pm
Car: 240sx

Post

quick and incomplete list of cars that use independent rear suspension(IRS), and hence, various styles of CV driveshafts....by CV shaft i am referring to the two axles which are connected to the rear differential, and extend to the rear wheel bearing/hub assy.BMW, Mercedes, Audi, Volvo, Jaguar, Corvette, Cobra, Porsche, Lotus, Shelby series 1, Nissan, Subaru, Mitsubishi, almost every supercar or exotic, including ferrari, lambo, pagani, aston martin, and so on. It's a long list.

joes240
Posts: 80
Joined: Sun May 11, 2003 5:54 pm
Contact:

Post

Could the noise be my front brakes? I noticed they're starting to wear down and make some noises. I also pinpointed the popping noise to the front of the car, and it occurs when depressing the brake pedal usually. I don't think it has anything to do with which way the wheel is turned, just when I'm going in reverse and hit the brakes it will pop.

DAEDALUS
Posts: 5421
Joined: Mon Jul 22, 2002 8:50 pm
Car: 1990 Infiniti Q45

Post

Have you even looked at the tension rod bushing?


Return to “240sx General Discussion”