Thread: Toffee Apple bolts

We keep the genuine parts in stock...

Originally Posted by DirtyDawg

Who has replaced their drive member (Drive Flange) Bolts and if so with wat?
I was re torquing mine after replacing a seal and got to 30lbs and the thing twisted in half (Ken was a witness)
they arent H/steel...

here here mr speaker

Originally Posted by DirtyDawg

they arent H/steel...

they should be, you've scored a dud.

if ones been loose and hammering itself it will get that butteryfeel as all the little stress fractures wave hands and part company, I see maybe 1 a month like it and its usually only one or 2 bolts on a flange that do it. then its replace the lot after lots of swearing.

The OE bolts are supposed to be grade 10.9 High tensile. I have broken a few in my time, and the reason is fatigue. The tensile strength of these bolts is quite high, but if overtightened then they will stretch only a SMALL amount before breaking. I have replaced these with grade 8.8 in the past to test the theory that a slightly lesser tensility allows some degree of stretch and movement before plastic deformation and breakage occurs. The 'test' vehicle was a 130 Defender, its rear diff now resides under the back of my RR, Still with 8.8 bolts.


JC

Are they perhaps a one use only bolt? must be replaced every time they are undone.

Originally Posted by justinc

The OE bolts are supposed to be grade 10.9 High tensile. I have broken a few in my time, and the reason is fatigue. The tensile strength of these bolts is quite high, but if overtightened then they will stretch only a SMALL amount before breaking. I have replaced these with grade 8.8 in the past to test the theory that a slightly lesser tensility allows some degree of stretch and movement before plastic deformation and breakage occurs. The 'test' vehicle was a 130 Defender, its rear diff now resides under the back of my RR, Still with 8.8 bolts.


JC

so.....if i fit 8.8 grade bolts to the next 130 i see......




will i end up with its diff under lurch.........?

no, they're reusable so sayeth the emei...

I prefer the 8.8 grade with a lock washer under it tho, just seems right to me...