Jump to content
SAU Community

Recommended Posts

Perhaps it was fitted incorrectly. Too much heat in the crank or retaining bolts/screws not installed properly

Just a random guess seen as it sounds like you had a crank collar installed and thats where it broke. Better photos of the fatigue point?

Link to comment
https://www.sau.com.au/forums/topic/443843-broken-crank/#findComment-7299435
Share on other sites

Very lucky made 480kw with some wheel spin and then lost 100kw and then started looking for the issue and found that. No other damage done lucky. Motor out today for another crank and some rings etc then back on the road in a few weeks

Link to comment
https://www.sau.com.au/forums/topic/443843-broken-crank/#findComment-7299535
Share on other sites

Ill look at my wear guide later if I think of it but looks like it has fractured over a longer period of time. How long was this crank in use in this form for? And what Is the previous history of this particular part of the crank? (Heating to remove gear, crank collars on off etc)

Link to comment
https://www.sau.com.au/forums/topic/443843-broken-crank/#findComment-7299609
Share on other sites

Looks like the woodruff key is at a slight angle and has moved inwards causing extra stress on the cranks snout.

Id say the balancer was moving on the crank and the vibration caused it to crack.

Ive heard similar about Ross dampners, that why we went with a ATI one from the start.

Link to comment
https://www.sau.com.au/forums/topic/443843-broken-crank/#findComment-7300121
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now


  • Similar Content

  • Latest Posts

    • Then, shorten them by 1cm, drop the car back down and have a visual look (or even better, use a spirit level across the wheel to see if you have less camber than before. You still want something like 1.5 for road use. Alternatively, if you have adjustable rear ride height (I assume you do if you have extreme camber wear), raise the suspension back to standard height until you can get it all aligned properly. Finally, keep in mind that wear on the inside of the tyre can be for incorrect toe, not just camber
    • I know I have to get a wheel alignment but until then I just need to bring the rear tyres in a bit they're wearing to the belt on the inside and brand new on the outside edge. I did shorten the arms a bit but got it wrong now after a few klms the Slip and VDC lights come on. I'd just like to get it to a point where I can drive for another week or two before getting an alignment. I've had to pay a lot of other stuff recently so doing it myself is my only option 
    • You just need a wheel alignment after, so just set them to the same as current and drive to the shop. As there are 2 upper links it may also be worth adding adjustable upper front links at the same time; these reduce bump steer when you move the camber (note that setting those correctly takes a lot longer as you have to recheck the camber at each length of the toe arm, through a range of movement, so you could just ignore that unless the handling becomes unpredictable)
    • I got adjustable after market rear camber arm to replace the stock one's because got sick of having to buy new rear tyres every few months. Can anyone please let me know what the best adjustment length would be. I don't have the old ones anymore to get measurements. I'm guessing the stock measurement minus a few mm would do it. Please any help on replacing them would be fantastic I've watched the YouTube clips but no-one talks about how long to set the camber arm to.
    • Heh. I copied the link to the video direct, instead of the thread I mentioned. But the video is the main value content anyway. Otherwise, yes, in Europe, surely you'd be expected to buy local. Being whichever flavour of Michelin, Continental or Pirelli suits your usage model.
×
×
  • Create New...