Here the original SBSaw the original SB, don't have a copy. I had this one done yesterday:
Applicability: Evora S
Issue: Clutch pedal falls to the floor, resp. loss of clutch action
Cause: Boiling hydraulic fluid due to overheating in the engine bay
Correction: There is an additional piece of thermal insulation, that should be mounted on the hydraulic line close to the clutch cylinder. The hydraulic line then has to be vented and refilled.
My clutch pedal fellt through when I started the car on Monday. After pulling it all the way back up I was able to return home (300 KM), but with a very soft pedal. Afterwards I recollected, that the pedal had become softer over time, I've done a lot of high speed driving, so the engine bay gets very hot in that area.
The dealer didn't have the riginal thermal covering, but he improvised. Draining the system was acutally the much bigger chore. Its really tight under that engine and the cluth only refills at the very top end of the pedal (which meant holding it up until all the air was out.
My master cylinder had to be replaced - and post that Motul 600 was used. No issues after that - including a good track day. No fade or spongy brakes at any point all day.The clutch problem is with all cars and it is hard to bleed pedal needs to be at the top to do it.
When the car is used worked hard in hot temperatures summer heat soak causes fluid to boil air stays in the system eventually causing pedal loss. the solution is to bleed replacing fluid with AP racing 600 fluid has higher boiling temp no problem after that even with heat shield it boils on original fluid when worked hard.
Motul RBF 600 is a DOT 4 fluid (as specd in owner manual) so Lotus can not hold it against warranty.The service manager at Galpin was uncertain as to whether or not using Motul 600 would be a warranty issue with Lotus. I know it exceeds what Lotus recommends, but that isn't a bad thing in this instance.
Any first-hand knowledge regarding this?
How would they know anyway? Just like how would an owner know if the correct oil was used in an oil change by a service facility? Seems a rather pointless concern (unless of course the fluid color was obviously different, but I don't believe that's the case).Motul RBF 600 is a DOT 4 fluid (as specd in owner manual) so Lotus can not hold it against warranty.