Caterham sigma 1.6 cannot disengage gear on track day
Discussion
Hi All,
First track day in Caterham. Ex academy car, 5spd box and 1.6 engine.
Really enjoying Bedford and starting to remember the corners when I had an issue. I couldn't disengage the gear. Clutch pedal to floor, it felt normal when pressing. At first, it just needed the clutch pedal lifted off and pressed again. Went into pits, drove around carefully and all seemed well. Back out on track and it happened again, trying to shift out of fourth and the gear stick wouldn't budge. Pulled over, still wouldn't budge after a couple of minutes. Limped the car back to pits, sat for a few minutes more, on and off the clutch pedal and eventually it came free. Didn't do more work on track as I had to get the car home on the road. Drove 2 hrs home, no issues at all.
I've given it the old google but nothing seems similar to my issue. Any ideas welcome.
Thanks,
John
First track day in Caterham. Ex academy car, 5spd box and 1.6 engine.
Really enjoying Bedford and starting to remember the corners when I had an issue. I couldn't disengage the gear. Clutch pedal to floor, it felt normal when pressing. At first, it just needed the clutch pedal lifted off and pressed again. Went into pits, drove around carefully and all seemed well. Back out on track and it happened again, trying to shift out of fourth and the gear stick wouldn't budge. Pulled over, still wouldn't budge after a couple of minutes. Limped the car back to pits, sat for a few minutes more, on and off the clutch pedal and eventually it came free. Didn't do more work on track as I had to get the car home on the road. Drove 2 hrs home, no issues at all.
I've given it the old google but nothing seems similar to my issue. Any ideas welcome.
Thanks,
John
First thing to ascertain is whether it's a hydraulic or cable clutch. Thought they were all cable, but I don't know the sigmas, and they may not be. Would be weird symptoms for a cable clutch, so I suspect hydraulic, and issues with one of the cylinders. If it's cable, change the cable - simple and not expensive.
upsidedownmark said:
Not doing well with phrasing! I meant 'see if the clutch disengages the driveline', not if it allows the gear to disengage. You're also of course right that if you roll off the power with some pressure on the gear lever it should easily disengage the gear without use of clutch.
Gotcha!I wouldn't waste money on diagnoses - but if you need someone to take it out you've got Seven and Classics at brands hatch, Boss Racing down that way too, or if you have deep pockets - Deep Pockets Racing (DPR). A bit further north is PT sports cars.
They will all send you to R&R for the rebuild though, will likely cost around £500 for the rebuild depending on how much needs replacing. Remove and re-fit probably 4-5hrs labour
They will all send you to R&R for the rebuild though, will likely cost around £500 for the rebuild depending on how much needs replacing. Remove and re-fit probably 4-5hrs labour
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