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E46 320ci M54, 2.2 170cv convertible '00
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640 Posts
Discussion Starter · #1 ·
I'm planning my cooling system refreshing this winter.

I need some help to identify parts to be changed, if I missed something.
I have some doubts on the schematics, I'm not sure they are all I need (or if I need them...)
My car is a european (italy) M54, manual, automatic clima, left-hand drive.

I've already read the overhaul guides, but I have some doubts for the little hoses, expecially the ones going to the heater....and If i need to change them.

I already changed my thermostat and water pump.

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03 expansion tank - 17117573781
oring of part 5 - code?
06 cap - 17117639022

Font Line Parallel Art Auto part


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01 Water hose - 17127510952
02 Vent screw - 11537793373
03 Water hose - 11531436408
Temperature sensor oring - code?
05 Hose return - 11531436410 - changed!
06 Water pipe - 11537502525
07 O-ring - 11531435808
08 Heater inlet pipe - 11531705210

Product Organism Font Auto part Parallel



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01 Hose f engine inlet and water valve - 64218376999
03 Hose f water valve and radiator - 64218363198
04 Hose f radiator and expansion tank - 64218376153
Font Line Auto part Parallel Drawing

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05 Hose f water valve and radiator - 64218363198
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'03 325iT Mystic Blau
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5,173 Posts
I did not do the hoses to the heater core on my first go round at ~100k miles, but I did replace them and the hard plastic pipes that they connect to the second time at ~200k miles.
Both times I replaced the sensors as a whole, which included the o-rings whose part numbers you're asking for.
 

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E30M3 Race F10 535 R1150Rt M Coupe
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7,468 Posts
There is no part number for the radiator temperature sensor O Ring. Generic part:

Coolant Temperature Sensor O-Ring (8 X 14 mm)
 

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E30M3 Race F10 535 R1150Rt M Coupe
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7,468 Posts

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I am at 240,000 miles (386,242 Km). While it is a good idea to replace the plastic pipes and water heater hoses if you've done regular coolant system flush/changes you may be able to hold off for a while longer.

I'm the original owner of my car and have done regular coolant flushes over the years and I'm still on the original plastic pipes and heater hoses. This included 14 years of driving the car in brutal Phoenix, Arizona heat. My plan is to change them someday but I've been a watchful owner. I've always avoided prolonged idling (drive-throughs, etc) which send underhood temperatures through the roof and cook all the plastic. In summer time in Phoenix I would pop the hood after work and let the engine cool off. So far these practices have served me well.
 

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E46 320ci M54, 2.2 170cv convertible '00
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640 Posts
Discussion Starter · #7 ·
There is no part number for the radiator temperature sensor O Ring. Generic part:

Coolant Temperature Sensor O-Ring (8 X 14 mm)
thanks for the oring suggestion. maybe is something that a general spare parts shop can have, I'll check.
I remember I already changed the temp sensor oring with a BMW one, green, that had a serial number. Maybe someting that came from sparks/coil zone, injectors... I don't remember exactly.

As, for the parts, do you think the higlighted codes are all I need?

I am at 240,000 miles (386,242 Km). While it is a good idea to replace the plastic pipes and water heater hoses if you've done regular coolant system flush/changes you may be able to hold off for a while longer.

I'm the original owner of my car and have done regular coolant flushes over the years and I'm still on the original plastic pipes and heater hoses. This included 14 years of driving the car in brutal Phoenix, Arizona heat. My plan is to change them someday but I've been a watchful owner. I've always avoided prolonged idling (drive-throughs, etc) which send underhood temperatures through the roof and cook all the plastic. In summer time in Phoenix I would pop the hood after work and let the engine cool off. So far these practices have served me well.
I would like to"dirt my hand" only one time, not leave some parts to be done in 2-3 years.
I'm planning to do this and vanos rebuild and pass as many years as I can without troubles with these parts.
 

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E46 320ci M54, 2.2 170cv convertible '00
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Discussion Starter · #8 ·
Any suggestion? Do I need some other part?
 
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