Oil temperature indicator high, any ideas?

[Secrets]

Hey guys, I'm having a problem with my 4.6, I recently took it to the shop to get some work done to it and now the oil temperature indicator is reading high. Even when the vehicle is cold and I turn the key to the on position, it would go to the halfway mark and when I start the engine, the guage would go pass 3/4. I have searched to see if there is a temperature switch but no luck so far. I replaced the oil pressure switch on the oil filter housing but it still reads the same. What do your'll think would be my problem? The vehicle runs very smooth and quiet except for that one problem which I definitely need to correct. Thanks for your input.

[bcredliner]

What work was done?

[TerminatorX5]

if you unlock the OBC computer in the cluster, you can read the actual oil temp, i think it is OELTEMP or something like that... to be honest, i did not look at how much a "normal" reading should be, but i am sure folks hee will take a note and can report the info for your comparasion...

once you establish that the oil is running at normal temp, then you will worry about the incorrect readings... if, on the other hand, the oil REALLY runs hot, then you need to dig into issue much deeper, to figure out what was disturbed while the work was done...

[Secrets]

I had the engine replaced, mine got overheated, so I replaced everything with all genuine parts with a complete different engine. I would assume its working fine cause I don't get any messages on the dash display but like I said even with the engine cold, once I turn the key on, it would go to half.

[bcredliner]

Have you checked to see if oil temp sending unit is connected?

[Secrets]

Where would that be? Where can I find it?

[bcredliner]

I read back on the thread and you have replaced the only oil temperature sensor/switch I know about.

Just to be sure--you didn't have this problem before you took the X in for some work? Was the work you had done changing the engine?

Suggest you unplug the sensor and then turn on the ignition to see if the gauge is at far left , then start the engine to see if moves.

Do you have the equipment to check for computer codes?

[Secrets]

Let me say first I really appreciate all the comments. Everything was ok prior to replacing the engine. I took it back to the mechanic and the BMW tech at the mechanic's shop told me the oil sensor is in the ecu. They had to replace the ecu for that engine hence the reason why it's not communicating. They also had to replace the chip in the key. So he gave me the original ecu and told me to have someone program the original ecu for the replacement engine since they didn't have the proper diagnostic equipment to do so. I will also have to get a key from the dealer cause they couldn't find the original chip. Now I'm looking for someone in the Houston area who can do this.

[bcredliner]

You won't like the price of a new key. Check with them first as you have to bring some thing(s) I didn't have with me and had to make another trip before they would order a key.

There are a couple of shops in this area (Dallas) that specialize in BMW performance that I would call to see if they can help. Houston must be similar.

Just wondering, did he say why the ECU was fine otherwise?

[Secrets]

A new key would cost about $220, and will need proof of ownership. The battery in mine is dead anyways and I only have one.
Well according to what he told me, since the original ecu was program for this particular vehicle, then that may be the reason why it's not communicating properly. I called one of the dealers and explained the problem with one of the service techs, and he quoted an average estimate about $140 to diagnose. So maybe I'll take it to them to try my luck. There is this one guy I was given his number but when I called him, he said not until two weeks before he can take a look at it. I just hate to drive with that guage reading very high.