AP Bell thickness & OEM bolts - Page 2

daniel · 20-09-2010, 10:59 PM

Quote:

Originally Posted by shimmy

No, haven't got the catalogue.

Could it be CP2494-1589?

Yeah, should be CP. Wasn't very clear.

**shimmy** · 20-09-2010, 11:07 PM

Quote:

Originally Posted by daniel

Yeah, should be CP. Wasn't very clear.

Check the 1589 as it seems wrong as well

daniel · 20-09-2010, 11:23 PM

Strange. It is these ones http://www.cslregister.com/forum/showthread.php?t=5169 and the number does appear to be CP2494-1589. What should it be?

I have just measured the oems disc through the bolt holes to the best of my ability and they appear to be approx 7.5-8mm.

**shimmy** · 20-09-2010, 11:33 PM

Daniel

Just read your post again

I think you are on about the disc bolts after all. You should be using AP bolt kit to connect the AP disc to the AP bell. New locking nut/bolt set torques to 14Nm.

Don't use the old BMW ones as like you say fitment is totally different.

daniel · 21-09-2010, 08:04 AM

Hi Shimmy,

Think I wasn't that clear. I am talking about the disc surface that bolts to the cars hub, I think the AP is thicker at this point which effetively pushes the wheel further out. And as the wheel bolts to the hub through the disc the bolt feels shorter.

Hope this helps.

**shimmy** · 21-09-2010, 09:21 AM

Quote:

Originally Posted by daniel

Hi Shimmy,

Think I wasn't that clear. I am talking about the disc surface that bolts to the cars hub, I think the AP is thicker at this point which effetively pushes the wheel further out. And as the wheel bolts to the hub through the disc the bolt feels shorter.

Hope this helps.

In that case either it is the wrong bell or you are not mounting it correctly flush.

Do the locating steel pins line up with the holes and end up flush. Is the bell sitting back touching the hub?

**cantfind1** · 21-09-2010, 09:26 AM

Hi Daniel. I know exactly what you are talking about. Even if Shimmy is being a bit slow!

I have the same issue with mine, the standard wheel bolts were too short, yes only 3 and a bit turns after fitting the AP discs and bells. I just went and bought longer bolts as I was fitting 10mm spacers as well.

I think the standard bolts are 25mm so you may need an extra 5mm or so think they come in a 32mm or maybe 30mm.

I never got around to measuring the AP bell thickness or the oem bell thickness but I assume the AP bell was a little thicker and that's where the problem is. Not sure if they are all like this?

My solution was fit longer wheel bolts!

daniel · 21-09-2010, 09:42 AM

Quote:

Originally Posted by cantfind1

Hi Daniel. I know exactly what you are talking about. Even if Shimmy is being a bit slow!

I have the same issue with mine, the standard wheel bolts were too short, yes only 3 and a bit turns after fitting the AP discs and bells. I just went and bought longer bolts as I was fitting 10mm spacers as well.

I think the standard bolts are 25mm so you may need an extra 5mm or so think they come in a 32mm or maybe 30mm.

I never got around to measuring the AP bell thickness or the oem bell thickness but I assume the AP bell was a little thicker and that's where the problem is. Not sure if they are all like this?

My solution was fit longer wheel bolts!

Thanks

Good man. Was doubting myself and wondering if any of it had to do with my wheels being refurbed etc. AP confirmed this morning that the AP bell are 2.5mm thicker than standard so longer bolts are needed. I had a bit of a juggling act with bolts last night and ending up having to stick +12mm bolts on the front wheels which do protrude from the rear of the hub a couple mm. Need to get a +4/5mm bolt now.

**glendog74** · 21-09-2010, 10:05 AM

Are standard OEM M3 brake callipers not different to standard OEM CSL brake callipers? Could explain different dimensions?

Ignore me if i'm talking poo

**shimmy** · 21-09-2010, 10:15 AM

Doubt it matters much, I've done 60k miles with AP and standard bolts in track and never come loose.

20-09-2010, 11:23 PM	#13
daniel S4 - Getting the hang of it Join Date: Sep 2009 Posts: 247 Casino cash: $11332	Strange. It is these ones http://www.cslregister.com/forum/showthread.php?t=5169 and the number does appear to be CP2494-1589. What should it be? I have just measured the oems disc through the bolt holes to the best of my ability and they appear to be approx 7.5-8mm. Last edited by daniel; 21-09-2010 at 08:25 AM.

20-09-2010, 11:33 PM	#14
shimmy CSL Register Uber-poster! Join Date: Apr 2008 Location: Uk Posts: 14,646 Casino cash: $43909	Daniel Just read your post again I think you are on about the disc bolts after all. You should be using AP bolt kit to connect the AP disc to the AP bell. New locking nut/bolt set torques to 14Nm. Don't use the old BMW ones as like you say fitment is totally different. __________________ .

21-09-2010, 10:05 AM	#19
glendog74 CSL Register Uber-poster! Tetris Champion! Join Date: Apr 2008 Location: Cornwall Posts: 8,861 Casino cash: $32299	Are standard OEM M3 brake callipers not different to standard OEM CSL brake callipers? Could explain different dimensions? Ignore me if i'm talking poo __________________ Cha'mone Mother F**ker!

21-09-2010, 10:15 AM	#20
shimmy CSL Register Uber-poster! Join Date: Apr 2008 Location: Uk Posts: 14,646 Casino cash: $43909	Doubt it matters much, I've done 60k miles with AP and standard bolts in track and never come loose. __________________ .

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21-09-2010, 08:04 AM	#15
daniel S4 - Getting the hang of it Join Date: Sep 2009 Posts: 247 Casino cash: $11332	Hi Shimmy, Think I wasn't that clear. I am talking about the disc surface that bolts to the cars hub, I think the AP is thicker at this point which effetively pushes the wheel further out. And as the wheel bolts to the hub through the disc the bolt feels shorter. Hope this helps.

21-09-2010, 09:26 AM	#17
cantfind1 S5, Sport Off, DSC M-track Join Date: Oct 2009 Location: Sydney Australia Posts: 675 Casino cash: $6490	Hi Daniel. I know exactly what you are talking about. Even if Shimmy is being a bit slow! I have the same issue with mine, the standard wheel bolts were too short, yes only 3 and a bit turns after fitting the AP discs and bells. I just went and bought longer bolts as I was fitting 10mm spacers as well. I think the standard bolts are 25mm so you may need an extra 5mm or so think they come in a 32mm or maybe 30mm. I never got around to measuring the AP bell thickness or the oem bell thickness but I assume the AP bell was a little thicker and that's where the problem is. Not sure if they are all like this? My solution was fit longer wheel bolts!