Hello,
2004 Breva 750, I’ve bought a replacement expansion chamber / crossover pipe and need to remove the Lamda sensor from the old one. The crossover pipe is in the vice, I’ve got a long spanner on the Lamda sensor, turning hard, and nothing is moving. I’m concerned that I’ll either round over the Lamda nut and then be unable to remove it, or crush the old crossover pipe and be unable to re-fit it if I give up and can’t remove the sensor.
I can apply more force if necessary, longer lever, more force, tectonic plate splits in 2, that sort of thing.
My question is: is the Lamda sensor normally really difficult to remove? Is there a technique? Is it on a left-hand thread for some outrageous reason?
Any opinions gratefully received.
Doug
Lots of penetrating oil and leave it a good while. WD40 or anything similar, or if you can get it drop of diesel let that soak down the threads (diesel,s ability to creep down threads is amazing). It may want a touch of heat too. And remember to ease it in both directions to break the rust. Hope this helps a little.
1 Like
As Sparkie says heat and ease it back and forth to crack the corrosion.
Diesel is a much better penetrant lube than WD40 But I prefer Plus-gas as it does not burn on red hot components.
The Boxer forum in the USA mostly swore by a mixture of ATF (automatic transmission fluid) and acetone for this sort of job, but I must admit I’ve not tried myself.
The reason on things being stiff and stubborn is probably a stainless-to-stainless setup, and it doesn’t work well after years of cold-hot-cold cycle. Literally, it may be “welded” together. I wish you all the best and please let us know once you’ve succeeded. You may also try some proper heat, the sensor is designed to work in such conditions after all.
1 Like