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[philich]

Can anybody tell me which crank sensor should be fitted to my 2.5 v6,it a W Reg facelift car
Is it the Siemens or the Bosch ?
The reason I am asking is I believe I may have been fitted with the wrong one
Thanks
Phil

[Temetsy]

What makes you think you have the wrong one? No-starter?  

[philich]

It’s a long story but the car the engine when hot would not go above 3000 revs, I replaced like for like, a Siemens unit, this cleared the problem
It looked like it had been changed before, maybe twice the old cables were just cut off
Its done about 500 miles and now when it gets hot it keeps cutting out and saying no signal(but not putting the dash light on} I clear the code then 5 minutes later it comes back
Now I have read that putting the wrong type in, they may run for a while and then cause problems
( I have swopped engines but that’s another story )

Phil

[Temetsy]

Might be wrong type then

[philich]

That’s what  I was thinking, the car was facelift just before they went to 2.6 so its in no man’s land in a lot  of areas

[Temetsy]

Seems like many thing in omega's are kind of no man's land But having been around them long enough makes you remember all these small variants of variants that vary of some other variant

[terry paget]

In the maintenance guide, V6, crank sensor change, there is a note for 2.5 engines, saying make of sensor is critical and must be same as original. Siemens is most common and is the one Vx dealers will sell you for the 2.5. I have had 2 CPS failures on 2.5s, in each case original was Siemens. In first case (V reg) I bought Vx Siemens, no trouble , still running well after two years. In second case (X reg) I bought cheap e-bay sensor, claiming to be Siemens, right part number, for £25. It worked perfectly. Then I read awful tales of cheap sensors, so bought genuine Siemens from Vx dealer, and fitted it. After two weeks and 400 miles, it failed (engine stopped, after half an hour restarted). I replaced cheap sensor, it worked perfectly. I returned genuine Vx sensor for replacement; I got a replacement, but it was a struggle. I still have it as a spare.

My conclusion - 2.5 V6s are peculiarly sensitive to crank position sensors. getting a good one is tricky.

[philich]

 Thanks
Yes mine was a W Reg and Yes it’s a Ebay Siemens type but  the wiring is a real mix that’s why I am thinking it should be the later Bosh type
I was hoping someone has a similar model year and may know

[05omegav6]

Thanks
Yes mine was a W Reg and Yes it’s a Ebay Siemens type but  the wiring is a real mix that’s why I am thinking it should be the later Bosh type
I was hoping someone has a similar model year and may know

Do you know the reg of the car the engine came from

[philich]

Hi

yes its X 151 NNP

[05omegav6]

Hi

yes its X 151 NNP

Order one for that reg

Actually, that only applies if you fitted the ecu and loom from that car at the same time as the engine

If you kept your loom and ecu, then your reg is the one you need for ordering...

[philich]

Hi thanks

Yes the complete wiring loom and ecu were transferred but after reading the link http://www.omegaowners.com/forum/index.php?topic=96562.0
And considering that is one of the last 2.5 then I would have maybe expected to see a Bosh part not the Siemens which has failed again, and if what’s said in the article is to be believed then the main agents can’t get it right
You see my problem

[Diamond Black Geezer]

We feel your pain, most of us have been there! Also welcome to the forum 

[terry paget]

Car referred to in message 6 was X84GNB engine no, 08351729 chassis no. WOLOVBM35Y1003159, quite near your donor car, it had a Siemens CPS sensor and the Vx genuine replacement soon failed. Car was scrapped in April 2014.

[philich]

Thanks for the info guys
My chassis was WOLOVBM69Y1147343 Looks like try a £25 cheapy from EBay and hope the best