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#1
12-24-2013, 07:24 PM
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Getting ready to DIY Vanos and timing chain guides...what else to do?
X5 currently has 136K miles; no issues except for the Vanos and chain guides noises/symptoms. Should I go ahead and replace the water pump/thermostat, valley pan, and the alternator while I have the lower timing chain cover opened? How long can a water cooled alternator last? I hate to do this big job and have to go back to redo those mentioned above in the very near future. Thanks in advance for the wise guidance.
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2003 X5 4.4i Titanium Silver 
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#2
12-27-2013, 10:04 AM
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Personally I think the W/P, thermostat, and valley pan gasket don't need to be replaced. Although I'd certainly have a look to see if there was ANY evidence of leaking on the valley pan. If there was the slightest weeping, then yes do the valley pan, otherwise leave alone. The waterpump isn't that involved, and the thermostat is even easier.
There will be two camps on the alternator. One will say change it out as its high mileage, as well as a 'while you're there' ethos. The other will say leave it alone if you haven't noticed any issues with it backed up with the rationale of it's not too bad a job if you have to do it when it does pack up.. As they say in all good game shows, 'MrFixIt, the choice is yours' 
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Present: 01 X5 4.4i 07 Yam R1 Past: 89 R32 Skyline various mods, running 442 BHP 00 Merc CLK55 AMG 01 E39 M5 Haywood and Scott silencers 02 E46 M3 Supersprint Cats, Eibach Lowered, Thorney Motorsport Remap, running 368 BHP
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#3
12-27-2013, 10:08 AM
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I'd do all of it because I'd hate to have to go back in. My alternator on my 03, went a month and change into ownership in August with 4xk on the X. I attribute the low mile failure to a lifetime in Phoenix.
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BMWCCA # 480346 '72 e6Tii rip '90 e30iC sold
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#4
12-27-2013, 10:31 AM
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I would think the water pump and hoses would still be ok with 40k or so on them. Obviously do a visual inspection when you get in there.
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Current Bimmer 2004 X5 4.4i Sterling Grey Sport/Premium Past Bimmers 1991 318I Alpine White 1995 740I Alpine White 1991 525I Schwartz 1998 323IS Scwartz 2004 330CI Cabrio Titanium Silver Metallic 1995 540I Schwartz 2000 Z4 3.0 Titanium Silver 2000 330ci Coupe Titanium Silver
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#5
12-27-2013, 11:14 AM
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Cooling system components are 100k miles maintenance items. You have another 50k miles on them easily. I'd leave them alone.
Are you replacing the entire Vanos units or just the seals selling on Beisan System website? The seals that BMW used are known to be inferior and start to harden around 30k miles or so.
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 00 E39 DINAN S1 //M5 (82k miles) 06 E53 DINAN 4.8iS, born 2/18/2006 (126k miles) http://www.xoutpost.com/bmw-sav-foru...s-my-dslr.html 90 Straman Z32 TwinTurbo Convertible, (1 of 44 ever made) 5 speed, 444rwhp/451rwtq 01 360 Novitec Spider F1 (26k miles)
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#6
12-27-2013, 11:16 AM
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I am sure at 40k it is all good but how will you feel if at 60k you have to open it up again? When I built my 350Z motor I replaced everything (oil pump, chains, guides tensioners waterpump etc just because I was in there. (motor died anyway thanks sh!tty machine shop)
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BMWCCA # 480346 '72 e6Tii rip '90 e30iC sold
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#8
12-27-2013, 12:03 PM
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If you end up replacing the valley pan gasket, consider pro-active replacement of the cooling pipe (that will leak at some point).
https://www.agacoolantpipe.com/product/n62-coolant-pipe Watch the video's, I enjoyed driving a friend's twin turbo X6 for two weeks but am glad to own an E53 with a less fussy M57 diesel....
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2002 Euro X5 (E53) 3.0 diesel (M57) 5 speed manual with UUC short shifter. Pre-xDrive NV125 transfer case (chain & gears). Factory Xenon headlights, Spyder LED tail lights Updated vortex crankcase breather. Motorsport dead pedal, factory fire extinguisher, factory first aid kit, factory F&R mud flaps, factory PDC Bilstein B6 shocks F&R Redline oil has replaced "lifetime" fluids (F&R diff, manual transmission, transfer case and P/S). Dimple magnetic drain plugs in all compartments.
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#9
12-27-2013, 12:25 PM
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Quote:
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BMWCCA # 480346 '72 e6Tii rip '90 e30iC sold
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