91 Lumina z34 Where is Crank Shaft Sensor

[comet240]

hi i like to know where exactly is the crank shaft sensor and how to remove it what the steps ?

[blazes9395]

There are two cranksaft sensors on the 3.4. One that is installed behind the harmonic balancer and the other can be found on the back of the engine above the the oil pan bolt rail and just under the rear head. That one is the common one that goes bad, and is the critical one for the engine to run, thats the one your most likley looking for.

it can be difficult to get to on these engines, but it can be done without removing anything, but its hard.

[comet240]

oh ic so why is there 2 sensors? and how do u get at it without removing anything like u said? and what is ur trick to getting at it by removing stuff? i looked under car is it the sensor by the driver side sticking side ways towards the wheels? or is that another sensor?

also was told cuz it cost me 900 bucks in the end to have it done on my other car u gotta remove the oil pan cuz the sensor breaks off as its a magnet and falls in the oil pan, is this true or false?

so back to repairs how can i do it? i was told remove lower engine mounts the back 2 and engine tilts but what are ur experiences?

[blazes9395]

You could get to it without removing anything, but like I said, its not easy. I have got to it once from the top and many times from the bottom. Removing the two rear cradle bolts and loosening the two front ones will also work too, as it will drop the rear of the engine down, giving you better access, but you have to be carful not to damage anything while tilting the engine this way. You can take to upper intake off and reach down in the back and get to it this way too, but you have to have long arms and are only working with your hands, no eyes to see whats going on - I've done it like this before too. Its tough on the 3.4s, as its very tight, but it can be done.

The sensor has a small 10mil(or 8mil? I don't remember)bolt on it to keep it there. Also, I have never heard or have seen of the sensor breaking apart and falling in the pan. It may be possible depending on what make of sensor is used, but I have never personally seen one.

[comet240]

oh ok ill try so witch side is it on from the back? what sensor is under the engine or well under car its near the driver side near the driving arms is that a power steering sensor? so ill have to try from top how far down is it? any pics do you have of what i lookin for so i can see first hand what to look for?

[comet240]

ok i gonna try today but u said its hard to do from bottom what are the steps u have done to remove it? without removing anything? i guessi was looking at the tranny sensor so i gonna look today in between the tranny and oil pan for that sensor.

damn car after this i scrapping it i guess cuz my other z34 is red i love it but the rear strut brace has rotted out of the frame and well u cant weld rust damn the uni body lol

[comet240]

i tried to go from bottom with my hand coming from side and also straight up couldnt do it tried to do it from the top with the pleminum off but couldnt do it can you tell me the exact steps u did to get it from the bottom and also what exact steps u did to get it from the top and it looks like a screw that holds it in not socket but then again i cant tell cuz it so far away doh.


so steps be good cuz i curising at this car lol