need stronger inner cv joints for a g40 any ideas

Oli b · December 23, 2011, 06:41:52 PM

hi got a polo g40 engine in my mk2 golf but i keep breaking a inner cv joints im using mk2 golf 1.3 outer cv,s and standard g40 inner cv,s or could this be a age related thing and would be better to buy new g40 joints, im running about 145bhp on 15 inch wheels
i dont do wheel spins and clutch drop starts last one broke at 90 mph when under full power
so any idea,s cheers guys

xandyx · December 23, 2011, 11:28:33 PM

with that power, it's not suppose to break cv joints. maybe they were too worn at theyr limit.

get new cv joints and rebuild them and fill the boot with a good amount of graphite grease.

if you plan going with more hp, check the topic about stronger drive shafts. there's allways someone ready for a group buy.

cheers

Oli b · December 24, 2011, 12:30:25 AM

Thanks for the reply
Had a look at that group buy but thats not what i keep breaking
These keep going

The cage in the cv joint keeps splitting in half happend twice on the inner passenger side cv joint

Yoof · December 24, 2011, 03:34:43 PM

You lowered alot?

Oli b · December 24, 2011, 05:30:42 PM

Its low but not huge amount of drop
Still have helper springs in and got another 30mm to go on the front

Alexiskayak_7 · December 26, 2011, 03:23:56 PM

Another possibility is, that your chassis legs are opening under acceleration load.
check out if your chassis has any cracks or else buy and fit a subfame, it will help a lot

Oli b · December 27, 2011, 05:13:58 PM

thanks for the reply but dont think that happens on a mk2 golf

youngprodigys · December 27, 2011, 10:00:38 PM

wrong length drive shafts will do that!
are you using a G40 box with mk2 golf shafts? - if so thats your problem! the later polos had different output flanges on the box - and thats why we have 2 lengths of driveshaft for the G40 - if you mix and mash them .... you get that!
i found this to my own peril when using a later spec 1W driveshaft on my early gearbox.... inner CV lasted a few months of sparing use! i swapped the flange to a correct item and now its fine

cheys03 · December 27, 2011, 10:12:52 PM

Quote from: youngprodigys on December 27, 2011, 10:00:38 PM
wrong length drive shafts will do that!
are you using a G40 box with mk2 golf shafts? - if so thats your problem! the later polos had different output flanges on the box - and thats why we have 2 lengths of driveshaft for the G40 - if you mix and mash them .... you get that!
i found this to my own peril when using a later spec 1W driveshaft on my early gearbox.... inner CV lasted a few months of sparing use! i swapped the flange to a correct item and now its fine

I thought the flange that changed size was on the driver's side though? I considered the varying flange length too Kiz but dismissed it when I read that this is happening on the passenger side. Unless the Golf is lhd?

hayesey · December 28, 2011, 08:29:56 PM

I agree with Kiz, I had this issue when someone cocked up my wheel alignment. Broke two inner CVs on one track day.

cheys03 · December 28, 2011, 08:58:36 PM

I can understand how wheel alignment would put stress on the shafts and CVs, but how does that relate to early/late spec gearbox output flanges Hayesey?

Oli b · December 28, 2011, 09:16:47 PM

Thanks for the replys my golfs rhd cheys
I currently am running
Complete mk2 golf 1.3 drive shafts with inner cv joints from a g40 and i have the standard 4 speed gearbox on at the moment as the atv box did this

Ive compared the golf inner cv,s to the g40 cv,s and they are the same dimensions

cheys03 · December 28, 2011, 09:26:04 PM

Is the engine central on it's mounts? If it's not then that could explain why the passenger inner CV is having problems as a consequence of any incorrect flange/shaft combination.

hayesey · December 29, 2011, 10:07:06 AM

Quote from: cheys03 on December 28, 2011, 08:58:36 PM
I can understand how wheel alignment would put stress on the shafts and CVs, but how does that relate to early/late spec gearbox output flanges Hayesey?

well if you have the wrong length driveshaft then the CV joint wont be running in it's proper position, the bearings will be right on the edge of the grooves they slot into. It's the same as happened with my wheel alignment, the person who did it didnt adjust my adjustable top mount correctly and then just wound the adjustable bottom arm right in to compensate. So it was like having a drive shaft that is too long or output flange too long, the whole strut and wheel were moved inwards. I dont have a problem now with ~200bhp now the alignment is correct.

youngprodigys · December 29, 2011, 11:02:47 AM

as above chris - hayesey explained it cock on! if your wheel aint aligned the shaft can sit in the wrong place (only because he has adjustable arms) but the point is - if the shaft is sitting in the wrong place in the cv it will wear and do what has been shown in the photo!