Crank position sensor mount replacement - How? 02 XC70

Post by **scot850** » 08 Dec 2024, 15:49

So today we pulled the crank position sensor to see if it is what is giving the P0016 error. Swapped it for an aftermarket new one I had and all seemed good. Owner got to the end of our back alley and got a 'reduced performance message'. Turned around and came back.

We had only disconnected 2 electrical connections (crank sensor and MAF) and disconnected one vacuum hose.

Nothing obviously wrong with the MAF connector or the vacuum hose. Decided to have a look at the crank sensor. Trying to remove the 10mm nut holding the sensor in, it became obvious the small stud holding the crank sensor in place had come away from the plastic mount.

With a mind to swap for a new mount in the future took a look at what needed to be done to remove the mount. Turns out is is held in place by 2 horizontal T40 headed machine screws. So not too bad. Except, the rear bolt you cannot access the bolt head without removing the transmission as the bellhousing casting prevents access to the bolt head?? So do you have to remove the trans to replace the stupid part?
Oh, and the lower radiator hose is in the way as well.

I plan to take a die grinder to the bellhousing to mage room to be able to get to the bolt head.

Has anyone else swapped this mount and found an easier way to do so?

Thanks,

Neil.

dikidera · Post by **dikidera** » 09 Dec 2024, 04:26

I just broke mine today....

Post by **scot850** » 09 Dec 2024, 08:39

It is not terrible to get to. We pulled the airbox and then moved some stuff around. But to remove the mount will likely mean draining the coolant so you can move the lower radiator hose out of the way. The other water pipe to the head on that end may be able to stay in place.

I'm planning to either use a dremel or a grinding tip in a drill to grind out a slot in the trans casing to allow us to access the rear of the bolts. I will not be pulling the trans to do this repair!!

We plan to do a coolant flush as the car came with red coolant in it which may be the wrong type and according to my mechanic friend the engines don't like it. I have Volvo coolant on order so once it gets here we will tackle it along with a bunch of other jobs and this one may well be included.

Good luck!

Neil.

dikidera · Post by **dikidera** » 09 Dec 2024, 08:42

I don't believe it's such a difficult job, it can't be. But I ordered a brand new mount. Same thing happened to me. Except I went in to screw the CPS and the screw itself snapped from the casing.

Post by **vtl** » 10 Dec 2024, 09:15

Buy a new bolt. Old bolt you need to undo and cut off the head. New bolt needs next modification:

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Post by **scot850** » 10 Dec 2024, 19:33

Funny, I was thinking that about cutting off the head of the bolt, but nice one on the refitting. My solution was to dremel or use a die grinder to run a notch back far enough to remove the bolt.

Great suggestion! Thanks.

Neil.

dikidera · Post by **dikidera** » 14 Dec 2024, 08:34

I managed to get it out and the new one in without serious modifications. To undo the bolt that is partially obscured by the transmission you need to use a chisel made of steel or a material stronger than that. Then you need to remove the water nipple at the head to clear the space. Then you hit the bolt head with the chisel and a lot of force, but not in the middle, but towards the position where it will rotate to unscrew. Then use a flat-head screwdriver to unscrew it. Then you use the same chisel and gently start hitting that corner of the transmission(taking care not to crack that part of the transmission as it is thin) that prevents the bolt from easily sliding in. Then you insert the bolt in the new mount BEFORE you install the mount, but only halfway and then you insert the mount, continuously re-position the bolt in a way as to not get caught in the transmission cover.

Use flat-head screwdriver to tighten the bolt.

Post by **erikv11** » 14 Dec 2024, 08:40

Hoping I never break one of these mounts! Maybe I should replace it preventively during the head swap lol.

Post by **vtl** » 14 Dec 2024, 08:43

dikidera wrote: ↑14 Dec 2024, 08:34 I managed to get it out and the new one in without serious modifications. To undo the bolt that is partially obscured by the transmission you need to use a chisel made of steel or a material stronger than that. Then you need to remove the water nipple at the head to clear the space. Then you hit the bolt head with the chisel and a lot of force, but not in the middle, but towards the position where it will rotate to unscrew. Then use a flat-head screwdriver to unscrew it. Then you use the same chisel and gently start hitting that corner of the transmission(taking care not to crack that part of the transmission as it is thin) that prevents the bolt from easily sliding in. Then you insert the bolt in the new mount BEFORE you install the mount, but only halfway and then you insert the mount, continuously re-position the bolt in a way as to not get caught in the transmission cover.

Use flat-head screwdriver to tighten the bolt.

www.amazon.com/gp/product/B001M0O18Y makes it easy.

dikidera · Post by **dikidera** » 14 Dec 2024, 08:56

vtl wrote: ↑14 Dec 2024, 08:43
dikidera wrote: ↑14 Dec 2024, 08:34 I managed to get it out and the new one in without serious modifications. To undo the bolt that is partially obscured by the transmission you need to use a chisel made of steel or a material stronger than that. Then you need to remove the water nipple at the head to clear the space. Then you hit the bolt head with the chisel and a lot of force, but not in the middle, but towards the position where it will rotate to unscrew. Then use a flat-head screwdriver to unscrew it. Then you use the same chisel and gently start hitting that corner of the transmission(taking care not to crack that part of the transmission as it is thin) that prevents the bolt from easily sliding in. Then you insert the bolt in the new mount BEFORE you install the mount, but only halfway and then you insert the mount, continuously re-position the bolt in a way as to not get caught in the transmission cover.

Use flat-head screwdriver to tighten the bolt.
www.amazon.com/gp/product/B001M0O18Y makes it easy.

I didn't even attempt, the transmission bell-housing was so close to the bolt, I figured nothing could enter there normally, and the angle was too steep.