CV failure?, How can you tell? |
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CV failure?, How can you tell? |
JeffBowlsby |
Dec 2 2008, 01:28 AM
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#1
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914 Wiring Harnesses Group: Members Posts: 8,527 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
A few questions...How does a CV fail? Is it progressive or instantaneous? Any warning signs? How many miles does a CV typically last before it fails? When it fails, is it catastrophic? Can it cause an accident if you re at highway speeds or underbody damage? Can our 914s run with just one halfshaft...even temporarily?
I understand stock 914/4 CVs are NLA. What is the best recommended solution? Got photos of a blown CV? TIA. (IMG:style_emoticons/default/biggrin.gif) |
JeffBowlsby |
Dec 2 2008, 02:57 PM
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#2
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914 Wiring Harnesses Group: Members Posts: 8,527 Joined: 7-January 03 From: San Ramon CA Member No.: 104 Region Association: None |
This from Wikipedia and gif of a CV (is this what our CVs look like? (I should take one apart I guess):
"Constant velocity joints are usually reliable and largely trouble-free. The two main failures are wear and partial seizure. Wear in the outer joint usually shows up as vibration at certain speeds, a bit like the vibration caused by an unbalanced wheel. To determine if the joint is worn, a driver should find a big empty parking lot and drive the car slowly in tight circles, left and right. Worn joints will make a rhythmic clicking or cracking noise. Wear in the inner joints shows up as a "clunk" or "pop" when applying power or, if severe, when lifting off the throttle. Partial seizure causes a strange "pattering" sensation through the suspension. It is caused by the joint overheating, which in turn is usually caused by the outer joint gaiter/boot having split, allowing the joint to throw out its grease. If caught in time, one can clean the joint carefully, repack with grease and replace the gaiter/boot. Kits which include the grease, gaiter/boot, and retaining clips are available from most automotive manufacturers. Some universal gaiters/boots are split lengthwise enabling them to be fitted without having to disassemble the wheel hub and CV joint." Attached image(s) |
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