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) |
horizontally-opposed |
Dec 2 2008, 11:52 AM
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#2
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Advanced Member Group: Members Posts: 3,432 Joined: 12-May 04 From: San Francisco Member No.: 2,058 Region Association: None |
I've heard the clicking at least twice over the years. It's subtle, but not that subtle. And it is load-dependent, going away on a left or right turn but getting loud in the opposite. As it gets worse, it clicks going straight.
This seems to happen well before total failure, because I believe I was able to rebuild them. I seem to remember flat spots on a few of the balls, not cage failure, but memory is failing me 14-16 years later. I think a rebuild, new boots, and new grease did the trick, but maybe I did replace them? They are quiet now. The other clue: get under your car and keep an eye out for thin grease spray on the underside of the trunk floor, above the CVs. I spotted a split boot this way and repaired it before it became a problem. This is harder to do at the trailing arms, of course. pete |
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