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charleslabri
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Joined: December 08, 2019
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Location: Nashville/Yosemite
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 Posted: Sat Dec 05, 2020 11:53 am Post subject: Help identifying CV damage |
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So as im prepping to put this engine up in the body, i decided to check out my CVs- repack and all that.
Axles are still in, and ive just got them hanging down (trans is out)
When i pulled off the flange side CV boots today, i found a few things:
passenger side CV:
1. Looks like someone had replaced the passenger side CV recently, it was cleaner, and the grease was in better condition.
2. Though- the center bearing on the CV was jammed on the axle rod, and after removing the circlip, i could for the life of me not remove it.
3. if i tugged on the axle shaft it seemed to be able to slip in and out of the connection at the wheel- as if something wasnt seating properly over there. On the drivers side everything was tight. The play was in and out toward the transaxle/hub, not up and down.
4. I attempted to completely remove the CVs and axle off the passenger side by unbolting the CV from within the trailing arm, but the damned allen sockets were stripped. yay.
Drivers side CV:
1. grease was old, but things were in good condition.
2. everything came apart fine, but as I cleaned up the CV i saw some pretty good scarring where the ball bearings sat
3. the axle seemed to be tight in there, any tugging on it didnt budge it.
Questions:
Time for new CVs?
Are the axles supposed to have lateral play in them at the hub?
What should i be looking for from a wear perspective? id imagine bearing scarring is bad and is a sign of wear.
any tips for removing the bearing that seems to be stuck on the axle?
any tips on removing the stripped allen bolts from the trailing arm? should i be completely removing the hub and trailing arm to drill these out?
Looking at the parts diag (https://volkswagen.7zap.com/en/usa/vanagon/va/1981-4/5/501-54000/#11) it would seem that each axle has two CVs on it, so to rebuild the whole rear end id need 4 CVs and associated parts, yes?
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leecat
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Joined: September 13, 2012
Posts: 773
Location: Regina
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| Posted: Sat Dec 05, 2020 12:06 pm Post subject: Re: Help identifying CV damage |
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Can't help with too much of that, sorry - but when it comes to the allen bolts I've had good luck using the smallest available vice grips, and ONLY good brand-name ones, and locking them on there as tight as humanly possible. A few tries gouges the bolts up pretty good and the grips bite even better as the heads get more chewed up.
Hope you solve it all! Best of luck. |
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charleslabri
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Joined: December 08, 2019
Posts: 615
Location: Nashville/Yosemite
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| Posted: Sat Dec 05, 2020 12:07 pm Post subject: Re: Help identifying CV damage |
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| leecat wrote: |
Can't help with too much of that, sorry - but when it comes to the allen bolts I've had good luck using the smallest available vice grips, and ONLY good brand-name ones, and locking them on there as tight as humanly possible. A few tries gouges the bolts up pretty good and the grips bite even better as the heads get more chewed up.
Hope you solve it all! Best of luck. |
The stripped ones are the ones INSIDE the trailing arm.. so grips wont be possible
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djkeev
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charleslabri
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dhaavers
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| Posted: Sat Dec 05, 2020 12:18 pm Post subject: Re: Help identifying CV damage |
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Hammer a clean 12-point socket over the bolt head, remove as normal... 
- Dave
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Vanagon Nut
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Location: Sunshine Coast B.C.
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| Posted: Sat Dec 05, 2020 12:38 pm Post subject: Re: Help identifying CV damage |
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Lots has been written here on CV's but...
A hammer driven impact wrench will help with bolts at CV in the trailing arm.
Minor scoring or even galling at CV cage and/or hub might be a non issue. Pics? Some might say that re using a German made CV is better than a new CV made elsewhere.
CV's by themselves are sold as a unit: cage, balls, hub and typically c/w some grease.
Amount of movement may depend if wheels are on or off ground but normal lateral play felt at drive shaft when moving it by hand is most likely due to movement allowed by the CV's themselves. A small amount of that could be due to shaft moving in/out of CV hub.
It's not unusual for one or more out of the 4 CV's to be replaced.
HF usually has two pc Pittman arm puller sets. The smaller one should work to pull the hub off. If its too big, use a large open end wrench can be used to back it up? Both arms can be used for front end work.
Drive shaft metal is fairly soft so even if someone mushroomed the end and/or damaged the splines, a puller should work but as a last resort, file a tiny ~45º chamfer at axle end and/or using a points file or triangle file to clean up the splines at end.
Neil.
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Wildthings
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| Posted: Sat Dec 05, 2020 12:39 pm Post subject: Re: Help identifying CV damage |
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| Do not use allen head bolts but use only the triple square type. Make sure you clean the hole in the bolts heads out very well before inserting the tool and hammer the tool into place. Buy a long triple square adapter as it is easier to work around the bulge in the boot then a short one. |
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Captain Pike
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| Posted: Sat Dec 05, 2020 1:48 pm Post subject: Re: Help identifying CV damage |
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Use vice grips to bend open the trailing arm. pull the 46 nut and remove(yank out) the shaft.
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charleslabri
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Wildthings
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| Posted: Sat Dec 05, 2020 2:46 pm Post subject: Re: Help identifying CV damage |
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| charleslabri wrote: |
| Ok, have a 12 point 3/8 8mm socket on the way. |
Male sure it is a "triple square", they are a bit odd and many have no idea what you are talking about when asking for one. As I said the longer ones make the job easier.
| Quote: |
Here are some pics for entertainment
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Your CV's look pretty good, I would swap them side to side (not end to end) on the car so they wear on their less worn surface. |
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charleslabri
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dobryan
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Abscate
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| Posted: Sat Dec 05, 2020 5:25 pm Post subject: Re: Help identifying CV damage |
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No way those balls have worn 1mm out of round
I’ve run worse CVS than those
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crazyvwvanman
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Wildthings
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| Posted: Sat Dec 05, 2020 6:04 pm Post subject: Re: Help identifying CV damage |
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| charleslabri wrote: |
I got a triple square 8mm.. apparently that’s too big.
What size are those bolts? |
8mm triple square is correct, you want a long one like the one Crazyman linked to. For the six sided allen heads the require 6mm hex adapter, for them as well having a 4" long one helps. |
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Wildthings
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| Posted: Sat Dec 05, 2020 6:10 pm Post subject: Re: Help identifying CV damage |
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| Abscate wrote: |
No way those balls have worn 1mm out of round
I’ve run worse CVS than those |
The small ball is an awfully pitted looking, I would think it must be from some other CV joint and is just along for the ride. |
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charleslabri
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Joined: December 08, 2019
Posts: 615
Location: Nashville/Yosemite
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| Posted: Sat Dec 05, 2020 6:36 pm Post subject: Re: Help identifying CV damage |
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i was able to pull these suckers out with some elbow grease and the right 12 point bit.
when i pulled the OEM drivers side boot off the rear of the hub the grease poured out like water.
Ive now got them soaking in some degreaser to get this grease off so I can inspect for wear.
QQ:
What are my telltale signs of wear?
Is it visual, or can i measure these with calipers to get measurements?
also, anything i should be doing to the rear hubs while im there?
I figure im doing this now, while its easy and the transaxle is out. So i might as well do it right.
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Abscate
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| Posted: Sun Dec 06, 2020 3:20 am Post subject: Re: Help identifying CV damage |
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If the parts are right, just visual. You can clean up galling with a small file , they will run fine even looking quite nasty if you pack them with grease well.
I’ve run 30,000 miles on worse looking ones.
Keep track of which side is which, changing axle sides will change the wear point, flipping an axle on the same side will not
All bets are off on CV life if the Bus is raised/ lowered
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charleslabri
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