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7 Series - E65 / E66 (2002 - 2008)
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  #176  
Old 08-06-2014, 02:23 PM
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Quote:
Originally Posted by bmwmoe View Post
a week ago, and im a daily driver, its holding good so far.
dose it hurt to try?
dosent cost $$$$$
Doesn't hurt to try or experiment especially when it's on someone else's car/expense. So thank you for being the ginny-pig. Please keep us posted on the mileage from time to time. In a week or two (several tanks of fuel) you may want to open her up & see if the diaphragms have deteriorated (please post photos).
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  #177  
Old 08-06-2014, 03:18 PM
new760Liowner new760Liowner is offline
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I'd rather use Viton as an experiment. Unsatisfactory compatibility with gasoline and hydrocarbons doesn't inspire confidence. Hope it works out for you


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  #178  
Old 08-06-2014, 04:15 PM
bmwmoe bmwmoe is offline
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i took my own risk on my own car trying diffrent diaphragm. and the only thing that lasted so far is EPDM. plus i open one diaphragm up every day to see the condtion, no rips at all... just like when i installed it
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  #179  
Old 08-06-2014, 08:37 PM
nandro nandro is offline
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Almost every rubber lasts a while. I've tried a lot of stuff. It is important to choose not only the right bottom of the membrane material, but also the size.
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  #180  
Old 08-06-2014, 08:56 PM
bmwmoe bmwmoe is offline
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Not every rubber lasts. Because I used almost 10 different kinds of rubber. And none of them last .some of them last more then the others. But realy none of them lasts. But the only one the lasts so far is epdm. I been driving for almost 100 miles, so far good.
And about the size you just cut the same size as the hole, where the membrance sites then that circle washer (piston looking) pushes the round rubber so it Can seal it tight
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  #181  
Old 08-07-2014, 04:45 AM
new760Liowner new760Liowner is offline
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We'd all like to see pics of your three EPDM diaphragm replacement next time you have it opened up for inspection. What thickness of EPDM are you using?


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  #182  
Old 08-07-2014, 08:51 AM
bmwmoe bmwmoe is offline
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I will post some pics next time.
Woohoo. Finally I just passed emissions.
What does that mean? My 760 dosent have problems. No check engine. She runs A1
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  #183  
Old 08-07-2014, 09:09 AM
bmwmoe bmwmoe is offline
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The only thing I have to do to the car now, is try to figure out whats making that winning noise in the front of the engine. It sounds like a low power steering fluid! But the reservoir is full and no leacks at all!! I can hesr it on startups and when pushing the throttle only!
What do u guys think?

Last edited by bmwmoe; 08-07-2014 at 09:17 AM. Reason: more information
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  #184  
Old 08-07-2014, 10:22 AM
raymound raymound is offline
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it might be s water pump or a belt tensioner bearing...

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  #185  
Old 08-07-2014, 01:00 PM
bmwmoe bmwmoe is offline
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Thats true the water pump does leack a little coolant when its siting overnight. So maybe the bearing on the water pump is going out. And making that winning noise.
Thanks raymound
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  #186  
Old 08-07-2014, 01:15 PM
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While your replacing the water pump . I would replace the tensioner pullies also. Yes water pumps can make noise. Also check your fan clutch. And put new belts on it at the same time. How many miles on your 760 right now?

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  #187  
Old 08-07-2014, 01:22 PM
bmwmoe bmwmoe is offline
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Yes ebay got a deal on a water pump and all pullies and belt for around $250, not bad?
The car has 84k miles
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  #188  
Old 08-07-2014, 01:45 PM
mws mws is offline
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Duetsche parts?

Quote:
Originally Posted by bmwmoe View Post
Yes ebay got a deal on a water pump and all pullies and belt for around $250, not bad?
The car has 84k miles
please please PLEASE tell me you did not buy from DP aka Duetsche parts (spelling?). they are crooks and sell really low-quality crap for our cars on Ebay. How do I know? I bought a fan clutch that turned at the wrong RPM (too loud and wound the fan up way too strongly) and also was too short in length, so the fan blades, as they spun so fast they sucked the entire radiator towards them, sawed my hose and left me on the side of the road. total A-holes that would not stand by their product.

if you want the lowest price I am willing to pay for BMW parts, go with

http://www.bmwpartsweb.com

or

http://www.oembimmerparts.com


and I second the part about the tensioners.

1] replace them.

2] but... I have a noise/rotating thing going on the front of my newer motor and replaced all my tensioners and it's still noisy, so that means, the alternator, water pump, or the PS pump is noisy. It can happen.
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  #189  
Old 08-07-2014, 01:59 PM
bmwmoe bmwmoe is offline
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Thanks for the info mws. sure enough Dp is where I was going to buy the parts from. But thank god u told me so
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  #190  
Old 08-07-2014, 02:29 PM
mws mws is offline
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Hey, I did it and I have some experience as a professional mechanic. Live a learn, that's what the forum is for. Stay with actual OEM manufacturers and you'll be fine. Ebay has some deals, but you have to buy the OE manufacturer part from someone who sells them cheap. DP has this crappy knock-off brand called Hamburg Technik (the Ebay ads say HT) and they are just plain crap.

Also avoid at all costs: Febi, Karlyn.

If you use the link for oembimmerparts, you can look up who makes what, and then search for that manufacturer with that part number, on the cheap-- on the web.
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  #191  
Old 08-07-2014, 02:36 PM
raymound raymound is offline
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hey mws im a little bit lost... do you know where i can buy this new hpfp at a reasonable price?

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  #192  
Old 08-07-2014, 02:47 PM
mws mws is offline
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the link was way back on page 2
btw: nr123 mentioned to me he bought one here and they have him a 10% discount, so it was more like $1800.

http://faulknerbmwpartssource.com/pa...=FUEL%20SUPPLY

that link is dead, the new one is

http://faulknerbmwpartssource.com/pa...=FUEL%20SUPPLY

apparently, he emailed them and got an additional 10% off. He paid $1800 US each.

if you want to try to buy a couple of new VW Audi pumps (I found them mostly on Ebay) then the part numbers are just a few pages back. You would then take the diaphragms out and try replacing your old ones with that new part. To the US-- they are about $600 each, shipped, no idea how much money to ship to where you are.

I have not tried that fix, but I would not hesitate to do so, if I had bad pumps. (stay tuned, my car is starting to bump at idle and recently gave me an emissions-related code I have not looked up)
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  #193  
Old 08-08-2014, 09:11 AM
bmwmoe bmwmoe is offline
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Hey. Anyone tried epdm?. Its holding good so far I been driving on it over 200 miles. With no problems!
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  #194  
Old 08-08-2014, 09:41 AM
bmwmoe bmwmoe is offline
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You guys asked earlier the thickness of Epdm I used on the hpfp. Its .045" each so thats .045 x 3.
Maybe you can use one of the .090" and one of the .045"
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  #195  
Old 08-08-2014, 10:03 AM
raymound raymound is offline
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epdm?

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  #196  
Old 08-08-2014, 10:14 AM
mws mws is offline
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Pictures of EPDM diaphragms you made, please, and also, where do you source it? Mcmaster Carr?

what part number did you order?
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  #197  
Old 08-08-2014, 10:16 AM
mws mws is offline
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Viton

Quote:
Originally Posted by new760Liowner View Post
I'd rather use Viton as an experiment. Unsatisfactory compatibility with gasoline and hydrocarbons doesn't inspire confidence. Hope it works out for you


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I'm with you on this one. Viton with fiberglass reinforcement might be nice.

Have not looked up the properties of EPDM
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  #198  
Old 08-08-2014, 10:31 AM
mws mws is offline
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hmmm, I missed looking back and somehow, completely missed the entire EPDM thing. Just catching up on it now. I must say, it's encouraging. Cutting a sheet of rubber and trying to make my own diaphragms is something I would do in a heartbeat.

but...

>>
wiki:
EPDM exhibits satisfactory compatibility with fireproof hydraulic fluids, ketones, hot and cold water, and alkalis, and unsatisfactory compatibility with most oils, gasoline, kerosene, aromatic and aliphatic hydrocarbons, halogenated solvents and concentrated acids.
>>


Viton on the wiki:
>Viton is generally compatible with hydrocarbons, but incompatible with ketones such as acetone, and organic acids such as acetic acid.

hmmmph, they are opposites. well that's not good.

not so sure about gasoline and possible trace amounts of Ketones. looks like ethanol-blended and high-octane gasoline can have ketones:

http://www.iasj.net/iasj?func=fulltext&aId=21783


googling around brings me to these compatibility charts, there's tons of them.

http://www.customadvanced.com/chemic...nce-chart.html


If I use Acetone as the Ketone and Petroleum for gasoline I get a B for Hypalon (CSM) in both categories. Better than the As and Ds you get for Viton and EPDM on either end of the spectrum for those chemicals.
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  #199  
Old 08-08-2014, 10:37 AM
mws mws is offline
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BTW: if you get a material that is thinner than our diaphragms you should still be able to use the current annulus ring to hold the new material down as long as you shim. McMaster Carr sells washers that are many thicknesses and accurate enough to be used as shims. You can mic them out and pick a couple from a batch that will work fine. (just remember to buy stainless )
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  #200  
Old 08-08-2014, 10:42 AM
mws mws is offline
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Quote:
Originally Posted by nandro View Post
Almost every rubber lasts a while. I've tried a lot of stuff. It is important to choose not only the right bottom of the membrane material, but also the size.
Nandro is it true you used a diaphragm from the Skoda? If so, how do you buy them?

Last edited by mws; 08-08-2014 at 04:51 PM.
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