[Serf27]

Everything looks good.

Random part doesn’t go anywhere. Someone must have dropped it down there and never got it out.

[kingdom99]

Appreciate the help guys!

[kingdom99]

For my lower radiator hose my car originally came with one that doesn't have the temp sensor on the top like this. It's just a straight hose.



but most of the replacement I found online are only like this. Am I still able to use this as a replacement or should I keep looking for one without the sensor. Because when I attached a hose like this, it was able to attach onto the radiator and the thermostat but once I start filling coolant in the reservoir, it started leaking out the extra part once the level got high. Or did I just put too much coolant in my system ?

[Serf27]

You can use that hose but you need the sensor on the hose to seal that hole.

[kingdom99]

Originally Posted by Serf27

You can use that hose but you need the sensor on the hose to seal that hole.

So it doesn't matter if I have a sensor already in the engine bay or if my fan is connected somewhere else ?

[mainbearing]

I see one on Rockauto (Continental) without the sensor port. At least I did not see it here. I would suggest that you look on Rockauto first. The one with the sensor port looks to be for N51.

https://www.rockauto.com/en/moreinfo...=10068&jsn=455


https://www.rockauto.com/en/catalog/...tor+hose,10068

If you already have the hose and cannot return it, then you will just be using the sensor on the lower radiator hose as a plug. In that case, use the $5.79 Uro one from Rockauto. No sense spending for a $20-25 one.

https://www.rockauto.com/en/moreinfo...t=4748&jsn=425

Or take your pick, use the one for the lower radiator hose, not the cylinder head ones:
https://www.rockauto.com/en/catalog/...+/+sensor,4748

Originally Posted by kingdom99

So it doesn't matter if I have a sensor already in the engine bay or if my fan is connected somewhere else ?

[Serf27]

Originally Posted by kingdom99

So it doesn't matter if I have a sensor already in the engine bay or if my fan is connected somewhere else ?

The car won’t know you have a sensor there if there is nothing plugged into it. (Just don’t tell the DME )

You would just be using the sensor to make the seal on the hose.

[kingdom99]

Ahhh I see, that makes sense!

[kingdom99]

Also there was another issue when i started the car, the radiator fan started blowing on high even with the fan off , any reason for so. Is it the sensor ?

[Serf27]

What sensor?
Sounds like your water pump and thermostat is about to go out.

[kingdom99]

Originally Posted by Serf27

What sensor?
Sounds your water pump and thermostat is about to go out.

The sensor for the lower radiator hose. Hmm the thermostat is new, and the water pump was working during the first bleed I think.

[kingdom99]

Also any ideas on what wire this is that is cut

https://ibb.co/album/3BZFQS

[Serf27]

Originally Posted by kingdom99

For my lower radiator hose my car originally came with one that doesn't have the temp sensor on the top like this. It's just a straight hose.

Originally Posted by kingdom99

The sensor for the lower radiator hose.

You say your lower radiator hose has NO sensor. Thus, there is no connector that is going to that sensor. Did you already install a new hose, with sensor?
If so, the sensor is not doing anything.

—>

Originally Posted by Serf27

The car won’t know you have a sensor there if there is nothing plugged into it. (Just don’t tell the DME )

You would just be using the sensor to make the seal on the hose.

—

Originally Posted by kingdom99

The sensor for the lower radiator hose. Hmm the thermostat is new, and the water pump was working during the first bleed I think.

The water pump is able to function and bleed the system, but a fan full on indicates water pump is over correcting for “false-hot engine” and/or thermostat sending the wrong coolant temperature. I have seen very few posts about coolant temperature sensors going bad/causing issues.
^This is based off of what I have experienced and read online.^

Originally Posted by kingdom99

Also any ideas on what wire this is that is cut

https://ibb.co/album/3BZFQS

That is the battery safety terminal (BST). It is set to deploy during an accident/when airbags are triggered.

I am assuming you have an airbag light?
The wire looks to be cut close to the connector. You may/will need a used connector with extra wire attached to it to splice it in.

[kingdom99]

Originally Posted by Serf27

You say your lower radiator hose has NO sensor. Thus, there is no connector that is going to that sensor. Did you already install a new hose, with sensor?
If so, the sensor is not doing anything.

—>



—





The water pump is able to function and bleed the system, but a fan full on indicates water pump is over correcting for “false-hot engine” and/or thermostat sending the wrong coolant temperature. I have seen very few posts about coolant temperature sensors going bad/causing issues.
^This is based off of what I have experienced and read online.^



That is the battery safety terminal (BST). It is set to deploy during an accident/when airbags are triggered.

I am assuming you have an airbag light?
The wire looks to be cut close to the connector. You may/will need a used connector with extra wire attached to it to splice it in.

Yes, I install the hose with the new sensor. Alongside with a new sensor in the engine bay

I see, that's strange. Because I did just start my car yesterday and the fan wasn't doing that. Only after the battery died during the bleeding process and I got a jump start. Anyway to test the water pump ?

Ah that makes sense, my airbag light has been on. So I would just need to get another BST cable and splice the old one and new one

[kingdom99]

So something strange happened.

I tried using my old temp sensor to see if the fan would still be running on high. It didn't but the fan wasn't running at all

https://streamable.com/frnm4s

I then tried using the new sensor again, and the fan was running on high again.

https://streamable.com/1bomm9

As for my water pump. This is how it's been running

https://streamable.com/32g4jk

[kingdom99]

I didn't try running for error codes with the old sensor. but for the new sensor. These are what I got

00 JBBF OKAY 2 Error stored
A6CF 61
C90B 21

17 EKP OKAY No Error stored

18 EGS OKAY 1 Error stored
5726 A8

19 VGSG OKAY 3 Error stored
53FC 22
53FD 22
55C3 38

40 CAS OKAY 1 Error stored
A0B2 20

60 KOMBI OKAY 3 Error stored
931D 22
9319 21
931A 21

6D FAS OKAY No Error stored

72 FRM OKAY 3 Error stored
9CC1 64
9CC2 64
9CCE 22

78 KLIMA OKAY 1 Error stored
9C6C 21

[Serf27]

That does sound odd.

Non of your codes suggest a water pump issue.
I would clear those errors and see if they return.
They may have came up with the battery was low.

Where did you get the new sensor from?
Why did you change your old sensor out?

The fan does not run all the time.
Let the car reach operating temperature to see if the fan turns on. (With the old sensor in place)
Turn the AC switch on too.

You don’t need a new BST cable. You need a new connector that plugs into the BST cable. I think I have a few if you want to send me a PM.


Your oil filter housing gasket (OFHG) leak is pretty bad. I would address that asap.

[kingdom99]

Originally Posted by Serf27

That does sound odd.

Non of your codes suggest a water pump issue.
I would clear those errors and see if they return.
They may have came up with the battery was low.

Where did you get the new sensor from?
Why did you change your old sensor out?

The fan does not run all the time.
Let the car reach operating temperature to see if the fan turns on. (With the old sensor in place)
Turn the AC switch on too.

You don’t need a new BST cable. You need a new connector that plugs into the BST cable. I think I have a few if you want to send me a PM.


Your oil filter housing gasket (OFHG) leak is pretty bad. I would address that asap.

This is the sensor I got https://www.amazon.com/dp/B07W65X2WC...roduct_details

I changed it because I saw that the ring part at the end was coming a little undone and since I was already doing replacement, I thought might as well.

Gotchu I'll send u a pm

Yeah that's another issue that is on my list.

[kingdom99]

I also haven't recharge my freon yet, but I don't know if there's any correlation there though

[kingdom99]

These are the codes for the old sensor

00 JBBF OKAY 1 Error stored
A6CF 61

01 MRS OKAY 1 Error stored
93B2 E0

12 DME/DDE OKAY 2 Error stored
2A3F 52
2A77 D2

17 EKP OKAY No Error stored

18 EGS OKAY No Error stored

19 VGSG OKAY No Error stored

29 DSC OKAY No Error stored

36 TEL/MULF OKAY No Error stored

40 CAS OKAY No Error stored

56 FZD OKAY No Error stored

60 KOMBI OKAY No Error stored

62 MOSTGW OKAY No Error stored

63 MASK/CCC OKAY No Error stored

6D FAS OKAY No Error stored

72 FRM OKAY No Error stored

78 KLIMA OKAY No Error stored

[Serf27]

If you can put your old sensor back in, I’d do it and see if the fan turns on when the car is warmed up.
Have you heard the fan turn on while driving (before swapping the new sensor)?

The new sensor los aftermarket and some aftermarket parts either work or they don’t.
I suspect the new sensor doesn’t work.

The DME codes are the only concerning ones.
This thread has a lot of good info regarding those 2 codes and may help you diagnose/fix them.
https://www.bimmerfest.com/threads/2...-2a77.1300661/

[kingdom99]

Yeah I put back my old sensor. I solve the error codes that was putting my car in limp mode, was a battery issue. And I got the car running again, I drove around for a while and I still didn't notice the fan coming on. But it wasn't overheating either so I'm not too sure