More sturdy clutch and flywheel recommendation - 1.6K Supersport

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nico.engel
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These are the information what i need Yes
Then the paddle race version is not that what i need. A little bit comfort would be nice.

I found also the right spigot bearing and matching spacer on the caterham shop, so i can order the two springs for the crb update.

  • bearing 30E108A
  • spacer 70228
revilla
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Hi Nico,

WARNING! The spacer sleeves I bought from Caterhamparts recently (several, over a few years) have been too thick. They damage the bearing on installation, leaving the gearbox shaft too tight. They are then almost impossible to remove.

These are MUCH better: https://qedmotorsport.co.uk/product/spigot-bearing-bush-to-take-ford-gea...

You only get one chance! If you install the Caterhamparts one and find it is too tight, you risk damaging the crankshaft getting it out again. The usually tricks for removal will often not work.

See this thread, especially the findings towards the end: https://www.lotus7.club/forum/techtalk/k-series-spigot-bearings-there-mu...

Somebody told me (actually it was Ralf who you bought your car from!) that QED can be difficult to order from from Germany. They don't always respond to emails and it can be difficult on the telephone. If you need help, I live five minutes from the shop so I can go one lunchtime and get you one.

Andrew

SV VVC 170 - 170.4 bhp @ 7100 rpm - 142.4 ft.lb. @ 4900 rpm

nico.engel
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Thanks for the warning, this thread is very interesting.

But Caterham sell these spacers for a long time now, than more cars should be affected, or not? Confused

I have to ask Ralf first, I think he has some spare parts on stock and check the dimensions.

But nevertheless many thanks for the helpfulness to buy one for me Angel 

SM25T
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It is possible that recent deliveries to CC may have come from a different place. I would follow the advice from Andrew, as he has rebuilt a lot of k-series engines.
revilla
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Do ask Ralf ... It was Ralf who reported the issue to me in the first place so he has seen it. I built an engine for him using the Caterham spacer. When he tried to centralise a clutch using a gearbox input shaft, he couldn't get it into the spigot bearing, it was too tight. He sent me a video showing that he was unable to insert the input shaft. I then borrowed an input shaft to test another engine I had built for him that was still with me and I found the same issue. Ralf removed the spigot bearing from the engine he had and fitted another, I believe using old stock spacers that he bought a long time ago, and it was fine. I removed the spigot bearing from the engine I still had and fitted a new one using a spacer from QED and it was also fine.

SV VVC 170 - 170.4 bhp @ 7100 rpm - 142.4 ft.lb. @ 4900 rpm

revilla
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Video sent to me by Ralf: https://youtu.be/zSANfW5OGJo

SV VVC 170 - 170.4 bhp @ 7100 rpm - 142.4 ft.lb. @ 4900 rpm

sforshaw
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Just to add a little balance and an alternative viewpoint ...

I've used both the original Caterham K-Series lightweight flywheel (~3.3kg) and the R500 version (~2.9kg) and both work perfectly well and make the pickup more instant. If I was building a K-Series of pretty well any spec for a road Caterham I'd likely use the o/e R500 version, no issues even with such a light flywheel. Just make sure it's the appropriate "missing teeth pattern" for the install.

Regarding spigot bearings and sleeves, I've never replaced a sleeve, only fitted new ones to crankshafts not previously used in a Caterham. Likewise I don't as a matter of course replace the spigot bearing, they are known to fail but if the existing one is fine I just make sure it's clean and add a tiny amount of grease. Never had one fail and failure is quite rare in a road going car.

Also regarding the clutch release bearing, the first Caterham engine swap I did 20 years ago I bought a new release bearing, decided it was not the same quality as the original and promptly refitted the original and I've done the same every time I've had an engine out since. It's one area where I work on the premise of "if it ain't broke don't fix it!" I've not done the pre-loading mod either and not had any issues ... famous last words!

I do however prefer balanced flywheels, they're so much smoother through the whole rev range, and I prefer to use new patchlock bolts when fitting to the crank, ideally these should be weighed individually to make sure there's none that are a long way from the average weight, it's not unknown.

Fitting a new flywheel/clutch is very straightforward, it doesn't need to be a major overhaul job.

Stu.

Lotus Seven Club AR Working Group

The register for all numbered limited-edition Caterhams ....... www.thecaterhamregister.net ...... www.instagram.com/thecaterhamregister