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AZBMW Forums › Model Specific Discussion › Other BMW Models › x5, what idiot thought plastic pulleys were a good idea?!?!?
x5, what idiot thought plastic pulleys were a good idea?!?!?
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scottinQC
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PostPosted: Sat Sep 22, 2012 11:36 am
Post subject: x5, what idiot thought plastic pulleys were a good idea?!?!?

Anyone have any secrets to replacing a radiator in 1 of these things. Mine seems to have developed a rather large hole. These things happen when the cheap ass plastic idler pulley explode. Most irritating thing is I just change the stupid belt yesterday

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Last edited by scottinQC on Sat Sep 22, 2012 4:56 pm; edited 1 time in total
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scottinQC
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PostPosted: Sat Sep 22, 2012 4:33 pm
Post subject: Re: x 5 radiator replacement

seems it was more than just the idler pulley. the cheap assed plastic water pump pulley packed it in as well..... FML. good thing performance radiator and chapman BMW are both open on Saturdays.

Got the whole thing repaired, and (re)did the belts and hoses. took about an hour and a half of actual work, and the same amount of running for parts.... whomever thought that plastic pulleys are a good idea needs to be taken out and beaten with a stick....

does anyone know if the diameters of the power steering and water pump pulleys are the same (or at least similar) between the M50 (metal) and the M54 (plastic)? seems that the bolt patterns are close, and that the routing is the same.

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xAZxE30x
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PostPosted: Sat Sep 22, 2012 6:31 pm
Post subject: Re: x5, what idiot thought plastic pulleys were a good idea?

you were warned! Very Happy

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scottinQC
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PostPosted: Sat Sep 22, 2012 6:44 pm
Post subject: Re: x5, what idiot thought plastic pulleys were a good idea?

not about idiotic shit like plastic pulleys.........:D

I was told to replace the cooling system (done today) but because of shitty plastic tanks on the radiator, not due to exploding pulleys......

Good thing is that its changed, I will be replacing the plastic pulleys with aluminum ones as soon as I get some $$$$. Performance radiator has the E53 rads for $165 bucks. Far cry from your boys at Chapman who wanted nearly $600. Chapman however did have the shitty plastic replacement pulley in stock. good thing, because I need this thing running.....Napa wanted a week to get the damn thing, and I wont have another day off for about a month or so (at least till we open at the airport....)

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giantkeeper
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PostPosted: Sat Sep 22, 2012 8:01 pm
Post subject: Re: x5, what idiot thought plastic pulleys were a good idea?

No bro, you absolutely were warned. You sir now own the x5 curse....enjoy!

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scottinQC
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PostPosted: Sat Sep 22, 2012 8:14 pm
Post subject: Re: x5, what idiot thought plastic pulleys were a good idea?

giantkeeper wrote:
No bro, you absolutely were warned. You sir now own the x5 curse....enjoy!

LOL

too bad this particular curse also belongs to all the poor bastards out there with either an M52 or M54. new aluminum pulleys will be forthcoming from Blunttech soon... just wish they werent URO parts brand.....

still think plastic pulleys are idiotic.

I can deal with window regulators and the other chassis specific niggles, but seriously what kind of idiot puts plastic pulleys on a car..... Idlers I can see (somewhat, they dont have load) but loaded drive pulleys are a bit much.

Seems that this particular pulley cracked when I removed the fan clutch yesterday. at some point it was torqued to about 10k ftlbs. using the APPROVED holding tool is what caused the pulley to crack (and twist one of the mount bolts. Seems like a bit of a design flaw there to me. but what do I know, Im just the monkey with the wrenches, and the wallet..... Very Happy

I dont really mind replacing the radiator and hoses (its maintenance type shit), but being stuck on the 143 for 2 hrs waiting on a dumbass in a towtruck pisses me off slightly.

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Jass
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PostPosted: Sat Sep 22, 2012 9:44 pm
Post subject: Re: x5, what idiot thought plastic pulleys were a good idea?

I agree. My M52 has them.

I was going to change my belts and tension pulley today - but I didn't have the special tool (anyone in Tucson have this to borrow?) to hold the water pump from spinning when loosening the fan clutch nut. It's on hold until next weekend.

Thinking about putting in an aluminum pulley. I will now take extra care trying to free the nut.
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scottinQC
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PostPosted: Sat Sep 22, 2012 10:53 pm
Post subject: Re: x5, what idiot thought plastic pulleys were a good idea?

Jass wrote:
I agree. My M52 has them.

I was going to change my belts and tension pulley today - but I didn't have the special tool (anyone in Tucson have this to borrow?) to hold the water pump from spinning when loosening the fan clutch nut. It's on hold until next weekend.

Thinking about putting in an aluminum pulley. I will now take extra care trying to free the nut.

best advice from someone who was there. replace the pulley. dont take the chance to save $45 bucks on a pulley, that when it breaks, will cost you at least a tow, and probably more parts broken. hindsight being 20/20, I would have held off on changing the belts until I got a new pulley.

the problem lies in the fact that the special holding tool bears against the mounting bolts, and this puts side stresses on the pulley (about 1/4 inch thick at that point) that can cause an aged pulley to crack, one that you may not notice until its too late (and in little pieces in your engine bay).

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