Hi guys! I am thinking its time to do my cooling system (the only thing I haven't refreshed yet since buying the car 2 years ago) and although I found some threads they all seem to be pretty old so I thought I would post a new thread and see if people can chime in on helping me get this done correctly.
'06 ZHP convertible with 98k miles auto trans
I picked up a UUC underdrive pulley/belt kit and the GAS 1.2 bar coolant cap but need some advice on what's best for the rest of the parts.
I don't track the car, but enjoy spirited driving, and only put about 5k miles a year on the car and have no plans on selling it.
What do you guys recommend? (I want to do it right the first time, but also don't need OEM parts if I can save some money on equal quality parts)
Is everyone replacing the radiator?
Upgrading to Mishimoto hoses worth it or just for looks?
What about fan delete on my auto trans car?
Thanks so much guys, and hopefully this will help others with a more recent thread about this maintenance project.
EDIT: Consensus of the thread
I'll be doing a new Behr radiator for piece of mind and because I will have everything apart already. If yours has low miles and is in good shape then most people say it can go a bit longer if need be.
From most things I have read and researched stay away from Mishimoto hoses. They tend to leak and customer service is nonexistent. I'll be using Rein as most everyone else has.
I did not put the water pump (11517527910) in the list because that is going to be a personal preference decision on which brand to buy. Stewart is awesome, but at $200 I can't justify it for what I do with my car. Maybe if I wasn't doing my radiator, I would have gone Stewart, but I'm right around $700 in parts with everything on my list, and the Stewart would have taken that to $850. I personally am going with GEBA, as it is cast steel rather than welded and many people use them with success.
EDIT: LIST OF COMPLETE PARTS
17119071519 Radiator for Auto Trans - Behr
17117573781 Expansion Tank - Modine at FCP
17117639022 Expansion Tank Cap - Genuine BMW (I'm using the 1.2bar cap from G.A.S.)
11531436408 Radiator Hose lower - Rein
17127510952 Radiator Hose Upper _ Rein
11531436410 Expansion tank to lower hose - Rein
11537509227 Thermostat Assembly -Wahler
13621433077 AUXiliary Fan Switch - OEM
07119963200 Coolant drain crush washer at engine -block - BMW
17137553919 Fluid Level sensor _ OEM
82141467704 1 gallon of Coolant - BMW
07119904524 water pump pulley hex bolts (need 4)
07129904553 water pump - need 4 nuts
17111712963 Fan Shroud Clip - Genuine BMW (in case you break them)
17111707777 Expansion tank mounting clamp (or you can use the original if in good shape)
17111436251 Expansion Tank Retainer (or you can use the original if in good shape)
If you have AUTO trans don't forget these:
17111437362 Auto trans Oil cooler thermostat - OEM at FCP
17111711987 Auto Trans cooler o-rings (need 2)
Check which pulley's and tensioner style you have to make sure you are getting correct parts (but for me they are below). You can also get complete kits but they are more money and most likely you can reuse your original bolts and washers (and you can even choose to just do the pulley itself if your tensioner is in good shape):
11287841228 Drive Belt Idler Pulley - INA
11281730349 Pulley Protection Cap - Genuine BMW
07119904677 Idler Pulley Securing Bolt - Genuine BMW
07119904115 wave washer for short bolt
07119906650 short bolt
07119904533 Medium bolt- reuse washer
07119904532 Long bolt - reuse washer and cap
07129905534 Fillister Head Screw BMW
11281748131 Hydraulic Alternator Belt Tensioner Roller INA
11281727159 Tensioner Pulley Dust Cap BMW
11281730532 Tensioner Pulley Mud Cap BMW
11287838797 Accessory Belt Tensioner Assembly - INA
Check which A/C tensioner style you have and also what rib belt you have to make sure you are getting correct parts (for me they are below):
4PK863 A/C Belt - Contitech
11287512758 A/C Belt Tensioner and pulley kit - INA
You should also get the main belt and a "metal water pump pulley" as well, but since I will be installing my underdrive water and power steering pump pulleys, I am using the belt and pulley's that came with that kit from UUC.
If your an AUTO trans and going to do the "fan delete = 2 for 1 fan mod" then you will need the fan assembly from a manual trans, or you can take your stock AUX fan from the front of the radiator and put it in the manual housing. The housing part number is 17117511168. I couldn't find a new manual assembly for less than around $200, so to save some money, I will try using my stock fan and the $70 new manual housing.
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