Broken CSR Rear Upright - Any Experiences?

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MarkTheGoose
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Broken CSR Rear Upright - Any Experiences?

So yesterday, traveling two up, on a not especially bumpy road at below 30 mph, moderately loud bang from the left rear corner and I'm suddenly sat in a CSR with very different handling characteristics.

I pulled into a side street and had a look and clearly something had broken.

A peak underneath revealed that the bottom end of the spring/damper was no longer attached to the upright - it’s mounting point on the upright appears to have sheared.

Now recovered back to my garage and I’ll go take a look later, with it jacked up & the wheel off - I’ll post some more pictures then.

A few initial questions:

  1. Caterham seem to want £1,300 for the part and it’s made to order (i.e. not available!). https://caterhamparts.co.uk/csr/1840-rear-upright-assembly-lh-csr.html - Are there other sources?
  2. Any informed guidance as to if the part could be repairable - would gaffer tape & bluetak hold it together?
  3. Anything I should be aware of as I start to take it apart - is there a CSR rear suspension assembly guide anywhere?
  4. It’s chassis number 18, so a very early car and this looks to be fatigue. Is it likely that the right hand side is going to go the same way?

All guidance and experiences very welcome, thanks...

(please don't tell me not to attempt to repair it with gaffer tape!)

Jonathan Kay
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Private Message sent.

Wrightpayne
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Looking at your photos and the pictures on the caterham parts website I wonder if you only need the bit in the picture below rather than the whole kit.....I have no experience of CSRs - just got my best glasses on studying the pictures ;-)

James B
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Mark - what dreadful luck (but, on the other hand, fortunate that it let-go in such benign circumstances).

First thing, I'd say, is to get the broken parts removed to see if repair is possible.  It's not exactly clear from your photos what part has failed. So we're talking about removing the hub carrier I guess (which will probably mean bringing the driveshaft with it).

If you're working on it this morning, I'm happy to come round and give a hand (or moral support, whatever).

James

elie boone
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By the look of it there was all ready a massive crack on the damper support, it looks like the top ball joint part broke and maybe CC can sell u just this part.

adrian.britnell
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Hi Mark

prior to my ownership one of the "toe link tabs" on the rear upright of my CSR was broken, I think it was broken in error whilst assembling or jacking up so not in use.

The broken lug was welded back on and knowing the owner it would have been done properly and not by a "chap round the corner " 

It may be possible to repair by welding by a certified welder ...... a good start would be someone involved in the motorsport fabrication industry, they would also have possible access to crack testing 

Regards Adrian

MarkTheGoose
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Guys, thanks... I have to say wearing 'best glasses', looks very promising - assuming Caterham will sell me just that bit. I feel much more upbeat now.

As one of the reasons for buying the car was for my son & I to tour Europe, I'm glad not only that I was going so slowly when it broke, but also that I was an hour's free recovery from home, rather than blatting up an alpine pass, when it let go!

I'll get in the garage in a bit and have a proper look with the wheel off and come back with more photos. JB, we'll probably have to wait a bit now to meet up in middle ground (& you might be doing the BTB exhaust measuring up)! I'll not take you up on your offer for assistance today as Mrs Goose has me going to Solihull for curtains and I've also a blown up PC to deal with today too! I will however get your support for when it comes to removing that bloody great big rear hub nut, assuming that's required at some point in the future...

Mark, Orange CSR 200, Stack dash

James B
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No worries Mark.  I sent my phone number by Blatmail.  If Ian (Wrightpayne) is right - and I think he may well be - then it shouldn't be hard to replace or even repair that piece and there would be no need to remove and strip the hub carrier as this part (I think) just bolts on.

Call me when you need a hand.

Meantime, this is kinda cute:  CSR rear suspension

James

Wrightpayne
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Just be cautious with steel bolts into aluminium - bit of plus gas / penetrating fluid.

Regards

Ian

MarkTheGoose
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Thanks James. Funnily enough, saw that 3D model last night, it was that with the photos I'd taken led me to the rear upright being the mounting (failure) point for the shock/spring. I'll txt you shortly, so that we've got comms established...

Mark, Orange CSR 200, Stack dash

James B
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James