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Old 09-04-2017, 04:41 PM   #1
OnTheFence
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My Ride: 2001 330i (and 530i)
Confession. I never changed the water pump and thermostat.

I bought a manual 5-speed 90k mile 330i last summer and did a bunch of stuff to sort it out.
I wanted to thank this forum for helping me sort out the car, and given me a great year of trouble free driving.
Been driving it all the time, and now has about 110k. At some point, I want to get the WP/T'stat done.

I am a little nervous about doing it, since I have not worked on the car since last summer.

The car had zero service history so I fixed whatever showed itself. (leaks, codes, etc)
  • Evap Purge Valve
  • Cam Position Sensor (Intake and Exhaust)
  • Washer Fluid Pump
  • Fix sunroof drains
  • Oil level sensor
  • New power steering lines
  • Valve cover
  • Oil Filter housing gasket
  • Fuel filter
  • Front Control Arm bushings
  • Front Sway bar links
  • Belt and pulleys
  • Fuel Pump
  • MAF

For the cooling system, I only replaced the expansion tank and return coolant hose. I never touched the water pump or thermostat. I decided to leave the radiator alone, since I hear of problems with replacements. If it ain't broke, I am going to leave the radiator alone.

When I changed the OFHG, removing the alternator was a challenge. Hammering that little sleeve back in, I will leave this here for my notes, in case it comes up again.

The first step is to order the parts.
The next step is to find a good video.

Any help?


9/24/17




330i has 110k and both were original from 2001.
Impeller was in perfect condition. Water pump bearing seemed fine. No wobble at all.
Thermostat was working perfectly.
In highsight, and all during the repair, I was saying I should have just left it alone.
Probably did not need to do this.



Took me over 4 hours from start to finish.
This one was way harder than it was supposed to be.
1) Hoses were nearly impossible separate from the radiator.
2) Pulley was fused to the water pump. Took forever to remove
3) Water pump was PITA to remove. Removal bolt threads were mucked, and WP still stuck when they were bottomed out.
4) Water pump was hard to push back into place. Had to eventually bolt it down to get it to seat.

I contemplated just leaving the 2 old radiator hoses, but it sucks to buy parts, not use them, and reinstall old ones.
The new pats would mock me from the shelf every time I went in the garage. Pussy!
It was now or never. Pry bar was nearly impossible to use, since everything is plastic.
The worst case is to break the existing part, and not be able to install the new part.
I had to keep yanking for like 15 mins straight until they gave.

Oh, and I mixed blue coolant with green. LOL.

Here are some tips for the next guy:

For the lower radiator hose, once I got some movement, I used a screwdriver to pry it off a little more.


In summary,
  1. Jack the car (Always 15 mins right there)
  2. Removing the undertray
  3. Remove airbox
  4. Remove fan
  5. Remove upper and lower hose (over an hour?)
  6. Did not need to loosen engine lift bracket
  7. Remove thermostat
  8. Pulley bolts (loosen)
  9. Detach belt
  10. Remove pulley
  11. Remove water pump
  12. Replace all.
  13. Bleeding,
  14. Test drive (making sure the 'stat goes from 96C to 93C)
  15. Next day:
  16. Top off coolant. Check for leaks.
  17. Jack car.
  18. Reinstall the undertray

Last edited by OnTheFence; 09-24-2017 at 10:25 AM.
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Old 09-04-2017, 04:46 PM   #2
Neonnblack
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Both are extremely easy in this vehicle. Hardest part would be taking the fan clutch and shield off. Even better if you're manual or have done the fan swap. Other than that it's straight forward 4 bolts on each and the water pump has holes to re thread the bolts into it to pull the pump out.

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Old 09-04-2017, 04:46 PM   #3
OnTheFence
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Thermostat.
I'll get BorgWarner/Whaler for $50.

Water Pump.
Saleri or Hepu?

Last edited by OnTheFence; 09-04-2017 at 05:18 PM.
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Old 09-04-2017, 04:47 PM   #4
OnTheFence
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My Ride: 2001 330i (and 530i)
I have the manual 5-speed
In the past, I have removed the electric fan, which was not a big deal.
I don't think my car has the fan clutch thing that is reverse threaded like the autos.

Last edited by OnTheFence; 09-04-2017 at 05:01 PM.
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Old 09-04-2017, 05:00 PM   #5
OnTheFence
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What other hoses could I change while I am in here?
I replaced #5 when I did my OFHG and expansion tank.

http://www.realoem.com/bmw/enUS/show...diagId=11_2180


Last edited by OnTheFence; 09-04-2017 at 05:18 PM.
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Old 09-04-2017, 05:15 PM   #6
Neonnblack
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Change them all. It's cheap and easy enough. And it's peace of mind. I think my pump was a saleri thermostat I can't remember.

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Old 09-04-2017, 05:15 PM   #7
Neonnblack
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I didn't do the hard pipes though.

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Old 09-04-2017, 05:19 PM   #8
OnTheFence
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Quote:
Originally Posted by Neonnblack View Post
Change them all.
Which do you mean by all ? #1 and #3 ?
Will they be detached anyway during this job?

Right now, in my cart I have
Salieri Pump
Wahler T'stat
Hoses #1 & #3
Coolant Temp Sensor (#4)

Anything else?
I'll need a gallon coolant, right?

Last edited by OnTheFence; 09-04-2017 at 05:41 PM.
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Old 09-04-2017, 07:10 PM   #9
Jason325xi
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I'd probably toss the oring for the temp sensor in your cart too, unless the sensor itself comes with one?

And I guess I can confess the same thing....I've pretty much the entire cooling system minus the radiator sitting in a box next to my bed since I bought the car. But I've never had a coolant leak or overheating issues yet so I just haven't got to it yet....and I have a somewhat secret fear that I'll do all of it "just because" and then I'll have bleeding issues and I'll be kicking myself lol for the time being though I did the temp gauge mod and I instinctively glance down at the temp gauge about every 30 seconds so I feel pretty safe for now haha
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Last edited by Jason325xi; 09-04-2017 at 07:22 PM.
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Old 09-04-2017, 07:21 PM   #10
Kpriest
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Quote:
Originally Posted by OnTheFence View Post
Which do you mean by all ? #1 and #3 ?
Will they be detached anyway during this job?

Right now, in my cart I have
Salieri Pump
Wahler T'stat
Hoses #1 & #3
Coolant Temp Sensor (#4)

Anything else?
I'll need a gallon coolant, right?


1, 3 & 4 for sure. 4 will come with some hoses so double check that.

A gallon of concentrated coolant and a gallon of distilled water is all you need.

If you have not done your belts this would be a perfect time since they will need to be removed. The URO metal water pump pulley is a great upgrade, probably the best item URO makes. The original is plastic and can crack.
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Old 09-04-2017, 07:37 PM   #11
OnTheFence
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I've done my belts. I will order the parts and get it done sometime this month.
Jason, I can totally relate to let sleeping dogs lie. You always have the chance of doing something wrong and regretting it.
With the cooling system, a bad bleed, and next thing you're overheating and causing the very thing you tried to avoid.
I am leaving the 110k radiator in place.
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Old 09-04-2017, 07:50 PM   #12
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Quote:
Originally Posted by Jason325xi View Post
I'd probably toss the oring for the temp sensor in your cart too, unless the sensor itself comes with one?
Lower temperature sensor O-ring part number is BMW #13621743299. the replacement sensor comes with the O-ring installed on the sensor. The sensor rarely has issues, but the O-ring needs to be replaced about every 5 years.
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Lower hose temp switch O-ring - BMW #13621743299
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Old 09-04-2017, 08:15 PM   #13
OnTheFence
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I actually have a spare #4 (sensor and o-ring) that I bought for a previous E39 and never installed.
Same part number. So, I will just use that one. O-ring is still supple as it was stored in a bag.
At the very least, it's better than the o-ring in there right now!

FYI, that E39 ran the OEM o-ring for 16 years and 150k+ without an issue.

Last edited by OnTheFence; 09-04-2017 at 08:17 PM.
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Old 09-04-2017, 08:16 PM   #14
OnTheFence
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Anyone know what brands of Zerex I can use for refilling coolant ?
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Old 09-04-2017, 10:07 PM   #15
Jason325xi
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Zerex g48 is what some people recommend to use besides bmw coolant
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Old 09-05-2017, 09:19 AM   #16
Manolito
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I learned to replace radiators as PM after two e36 radiators failed catastrophically with no warning. Come to think of it though, neither of my e46s has had a sudden catastrophic radiator failure. Expansion tanks yes, radiators no.
If you have replaced the belts, the water pump and thermostat will be no problem. As Neonnblack noted, screw pump cover bolts into the threaded holes in the face of the water pump to extract the pump.
I have learned from bitter experience to use only BMW coolant. Last time I checked, aftermarket coolant made by the BMW OEM supplier is not available for sale in the US.

The Saleri water pump that I put in my 330 in 2012 lasted four years and 38k miles. That is very poor durability, so last year I went with a Graf water pump and a Wahler thermostat.
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Old 09-05-2017, 09:25 AM   #17
GhostFlame
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If you're going to change OEM hoses to Gates or some other no-name, stop.
Keep the original hoses, as 9 times out of 10 they will fit much better.

Get yourself a 1.4 Bar ET cap if you haven't got one already.
Look up the OEM part for a 1988 325i and use that.

Water pump + thermostat can be done in 1 hour. It stupid easy.
Just make sure you put the belt back on the right way. You'll spend some time second guessing yourself there.

Last edited by GhostFlame; 09-05-2017 at 09:26 AM.
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Old 09-05-2017, 11:59 AM   #18
monisha
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my hose is perfect but the Circular with two smaller circles is broken does anyone know what that part is call
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Old 09-05-2017, 12:00 PM   #19
monisha
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my hose is perfect but the Circular with two smaller circles is broken does anyone know what that part is call
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Old 09-05-2017, 04:07 PM   #20
mickey513
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A word of advice, get a OEM, not OE or aftermarket thermostat and water pump from a BMW dealership. You can be for sure these two parts will probably outlast the car and they don't cost an arm and a leg either.
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