Some parts question in e39 before i start DIY

[bmw7833]

This is my radiator which u can see the cap is located in the right side, was told this type of radiator easy causing the overheat problem (because smaller) compare to the type which the cap in the left side.Question 1: Can i change my radiator from the current type to the left cap type?

Question 2: What is this? Temperature sensor?

Zoom in:

Plain view:

 

[jarance]

what is the radiator with the left cap?

As you can see the radiator width is already all the space available. To have better cooling, you need to have bigger area for the heat to radiate.

Since you cannot increase the space, you need to increase the cooling rate. This is done by increasing the cooling airflow via the aux fan and the clutch fan.

However, most problem of overheating is due clogged radiator, failure of the thermostat, failure of the aux or clutch fan or lost of coolant.

In most case, rapid lost of coolant is the main cause due leaking rubber hose, seal for thermostat etc.

 

[bmw7833]

This is what i meant, radiator cap in left hand side, was told better cooling effect than my current type and i see most of the e39 have this type. How about the question.2?

 

[jarance]

No.2 is the temperature sensor lar.

 

[pussy]

why want to change when there's nothing wrong with it now...

 

[moots]

7833,the rad you have is what i have fitted on my '97 528i and i do not have any overheating issues to date.on another note,my fren who has the same model,a hi line model,has the other type rad where the cap is on the other end.so,yes you can fit this type of rad.

2nd pic is the sensor for the aux/aircond fan.this activates the aux fan if the rad temp exceeds a certain temp(where the viscous coupled fan wud have failed)

 

[bmw7833]

No.2 is the temperature sensor lar.

Any method how to test whether the sensor in good condition or not?

why want to change when there's nothing wrong with it now...

Plan to change my current leak one mar, so if the left cap radiator is better then why not?

 

[bmw7833]

7833,the rad you have is what i have fitted on my '97 528i and i do not have any overheating issues to date.on another note,my fren who has the same model,a hi line model,has the other type rad where the cap is on the other end.so,yes you can fit this type of rad.

2nd pic is the sensor for the aux/aircond fan.this activates the aux fan if the rad temp exceeds a certain temp(where the viscous coupled fan wud have failed)

Any idea i can test the sensor condition?

 

[moots]

remove the connector and find the ground wire - shud be brown kaler.short the other 2 wires,one at a time,to this brown wire.one shud be lo speed and the other,hi speed.

 

[bmw7833]

remove the connector and find the ground wire - shud be brown kaler.short the other 2 wires,one at a time,to this brown wire.one shud be lo speed and the other,hi speed.

This method only use to check the condition of aux motor and resistor packs, no?

Add: which connector u meant? The one i show below or the temperature sensor connector?

 

[initialM]

Your E39 is CKD or CBU?

Weyy go & jilat your henjen la

 

[bmw7833]

Your E39 is CKD or CBU?

Weyy go & jilat your henjen la

CKD bro..When u free to jilat for me again?

 

[initialM]

haha. Why your expansion tank on the right? Normally double vanos on the right.

 

[bmw7833]

haha. Why your expansion tank on the right? Normally double vanos on the right.

I don't think this is single or double vanos problem. Some double vanos e39 also have the left cap type.

 

[tweiboon]

bmw7833

Your radiator almost same with my e36 318 1993

 

[moots]

This method only use to check the condition of aux motor and resistor packs, no?

Add: which connector u meant? The one i show below or the temperature sensor connector?

aiseh...sori bro u r right.to chk sensor i wud think that you have to remove it from the rad and dip it in hot water and see the resistance change with a multimeter i suppose but i do not have the values.


the temp sensor connector bro.connector above is for the aux fan

 

[bmw7833]

aiseh...sori bro u r right.to chk sensor i wud think that you have to remove it from the rad and dip it in hot water and see the resistance change with a multimeter i suppose but i do not have the values.


the temp sensor connector bro.connector above is for the aux fan

I can just remove the sensor without needed to drain the water 1st?

 

[moots]

I can just remove the sensor without needed to drain the water 1st?

yes but be prepared and definitely expect to have coolant to flow out.if you have a rubber bung or cloth you can shove it there to minimise the loss.of crs,do this with the engine cold ya.

 

[Herbert]

For clarification purposes, e39 (M52), the expansion tank is on the right. Whereas for e39 (M52TU & M54), the expansion tank is on the left.

 

[initialM]

For clarification purposes, e39 (M52), the expansion tank is on the right. Whereas for e39 (M52TU & M54), the expansion tank is on the left.

Thats why I wonder the different from my car & BMW7833? Can clarify?