I've just undone the lambda sensor in the exhaust manifold after a huge struggle, only to find the reason for the struggle was that I've knackered the thread whilst unscrewing. I have a couple of options: 1) cry. 2) force the new sensor in and hope for the best or 3) seek help from others who might have solved this problem in the past.

Is this thread helicoil-able?

Am I in for a new exhaust manifold?

All suggestions gratefully received.

Thanks

Merlin

S'pose it depends how much damage has occurred to the thread, but something like this looks worth a try for the money involved.

 

Obviously you'll need to check whether the thread sizes and pitches offered are what you have by measuring your new sensor.

Normally a new manifold/cat if a thread tap won't work.