Lambda tool

[groomvroom]

What size removal tool do you need for Chim lambda sensors?

[andy-w]

I am sure it is something like a 21-22mm (can check dinner time)long reach socket.
Buy one of them and with a grinder or hacksaw cut down the side to make a slot about 10mm wide for the lambda cable to pass through.

[that daddy]

17mm slim walled socket,its got to have a slot down one side for the wires,you can make them,you are welcome to borrow mine.

[groomvroom]

that daddy said:

17mm slim walled socket,its got to have a slot down one side for the wires,you can make them,you are welcome to borrow mine.

Thanks for the offer, have seen a Lambda removal set on ebay, wanted to make shure it had the right size included. Very nice car BTW

[that daddy]

thanks,just double checked def 17mm,got to be thin walled though.if not its out with the grinder,do not over tighten the new probes,good luck.ive just done this job got mine from a motor factor but insisted on genuine NTK there a group of NGK,thats lucas on the box then.

[andy-w]

that daddy said:

thanks,just double checked def 17mm,got to be thin walled though.if not its out with the grinder,do not over tighten the new probes,good luck.ive just done this job got mine from a motor factor but insisted on genuine NTK there a group of NGK,thats lucas on the box then.

Yes it is 17mm...just been home and had a look!!!

Just out of intrest how much did you pay for the censors...i managed to get mine for £80 from my local motor factors and he chucked in a free 17mm socket as he felt guilty at the price!!!

[jsr]

I recently replaced my lambda sensors. If you can't get the right tool, it's far easier to remove the pins from the plug and then thread the cables through a box spanner, than to make up your own tool.

[red griff 500]

How do you chaps know that the sensors need changing i.e. what are the symptoms of failure?

[that daddy]

Mine had erratic idle after a good run,motor fluffy down bottom end,4% co on gas analyser,turned out one had tip missing,they also looked original.i will say one thing with oxygen sensors you get what you pay for.they normally start going down hill after about 60k,they will still work but may switch slower,thats just a general tip.

[GreenV8S]

Easiest way to check for a good lambda sensor is to monitor the output voltage with an analogue meter. If it is only cycling slowly it is probably clogged and should be replaced. If it isn't cycling at all it may be duff, or there may be a fault elsewhere. If only one side shows the fault then swapping the lambda sensors over will show whether it is caused by the sensor. If both sides are faulty you may have some other fault, you could try changing the sensors speculatively although that's not cheap. At least you will end up with some spares afterwards if that wasn't the cause.

[groomvroom]

Interestingly all the removal tool sets start at 22mm so not a lot of good,how far up the socket do you need to cut the slot?

[that daddy]

22mm is standard sensor thats why there so easily available,even the snap/on man does not list this 17mm one,i used an impact socket and ground down the wall thickness and slotted 2/3 the way up.easy if you can get to a bench grinder,then angle grind a slot for the wires,takes about 10 min.failing that as the other guy said use a box spanner,mine where not that tight.

[GreenV8S]

groomvroom said:

Interestingly all the removal tool sets start at 22mm so not a lot of good,how far up the socket do you need to cut the slot?

About two inches from memory, basically how far the hex is below the boss, plus a gap for the cables to come out. Make sure the slot doesn't have any rough edges because these high temp wire coatings are very soft.

[that daddy]

Yes GREEN V8S is right forgot to mention go over slot edges with a file or similar to remove burrs,then rinse out with wd40 or water,easier doing than explaining.