HOW TO DO AN ADVANCED SEARCH.

Mon Jul 08, 2013 3:56 pm by Admin


For the benefit of 944Hybrids users there are two search functions available for you to use.
The purpose of this sticky is to explain the "Advanced Search" function because it is much more powerful and is the best choice when researching information.

When you log on to the site a list of options is shown in a line at the top of the page. One option is labelled "Search", use this option (NOT the search box lower down on the right).

After you click on the upper search option, a drop down box appears. At the bottom of this box is a radio button marked "Advanced …

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bmw hydro boost bomb "blew"

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bmw hydro boost bomb "blew"

Post  tkrame944 on Fri Apr 05, 2013 3:50 pm

i am running an ls1 with stock pump with the bmw hydro boost set up, and i just got the car fired up for the first time today. first start up was for about a minute and all was well i didnt touch the therottle just let it idle, the next start up i reved it up a bit and after a few revs it started making funny sounds and out of a valve pointed down on the bomb shot out a punch of very frothy atf, i looked in the resiviour and it was also very frothy. would anyone know what would cause this?

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Re: bmw hydro boost bomb "blew"

Post  zeusrotty on Fri Apr 05, 2013 4:10 pm

frothy is heat or air. Was the part that blew out tightened all the way?

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Re: bmw hydro boost bomb "blew"

Post  tkrame944 on Fri Apr 05, 2013 4:32 pm

it was definantaly air, it wasnt warm at all, and no parts fell off here is a picture of where the oil leaked from.

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Re: bmw hydro boost bomb "blew"

Post  tkrame944 on Fri Apr 05, 2013 4:33 pm

this is a veiw from under the bomb

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Re: bmw hydro boost bomb "blew"

Post  tkrame944 on Sat Apr 06, 2013 11:43 am

i refilled the resivour and blead out all the air in the bomb, and when i fired it back up it instantly started to drain from the same place, but this time no froth. nobody else ever had this happen?

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Re: bmw hydro boost bomb "blew"

Post  zeusrotty on Sat Apr 06, 2013 12:01 pm

Its actually the accumulator. It sounds like it isn't sealing. Is there an o ring?

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Re: bmw hydro boost bomb "blew"

Post  tkrame944 on Sat Apr 06, 2013 2:16 pm

The green that you can see in the picture is an o ring, it is not really doing anything at all its just sitting there

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Re: bmw hydro boost bomb "blew"

Post  Rich L. on Sat Apr 06, 2013 2:38 pm

That looks like where the pressure line to the rack is supposed to go.

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Re: bmw hydro boost bomb "blew"

Post  tkrame944 on Sat Apr 06, 2013 3:02 pm

I have checked and rechecked my routing and i have it correct, the area where it is leaking has nothing to attach a line to.

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Re: bmw hydro boost bomb "blew"

Post  Patb on Sun Apr 07, 2013 8:16 am

I checked mine and it feels like there is a cap of some sort in the center of the place yours is leaking.
I can't see mine the way its mounted but if you still need I will stick my phone in to get a picture of it later today. Your valve body willl need service or replacement at the least.
Pat

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Re: bmw hydro boost bomb "blew"

Post  tkrame944 on Sun Apr 07, 2013 9:18 am

It did seem like there was a cap there at some point . How would i and where would i get the stuff to rebuild it?

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Re: bmw hydro boost bomb "blew"

Post  Patb on Sun Apr 07, 2013 6:39 pm

I have no idea where to get the rebuild stuff if it is even available, i'd replace it.

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Re: bmw hydro boost bomb "blew"

Post  tkrame944 on Sun Apr 07, 2013 8:23 pm

Thats what im thinking too, you know a good place to buy one?

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Re: bmw hydro boost bomb "blew"

Post  948 on Mon Apr 08, 2013 7:24 am

If the ATF is coming out of the area marked by the number 5 in that diagram, your diaphragm might have failed. When the diaphragm fails ATF will fill this area; it could leak from the Nitrogen fill port?
If the failure happened suddenly the Nitrogen would mix and aerate the ATF.
Start the car, let it idle for 10 seconds, shut the car down, pump the brakes....the accumulator, when functioning correctly, should afford you 8-10 pumps and then become a hard peddle.
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Re: bmw hydro boost bomb "blew"

Post  tkrame944 on Mon Apr 08, 2013 1:26 pm

When i hit the brake petal you can hear air being pumped out of the accumulator.

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Re: bmw hydro boost bomb "blew"

Post  v8carreragts on Tue Apr 09, 2013 4:34 pm

That part of the regulator is suppose to be covered. There is a spring and spool valve under there. You probably need another regulator. A new one is insanely priced so I would get a used one.
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Re: bmw hydro boost bomb "blew"

Post  87-944S on Tue Apr 09, 2013 9:52 pm

Bummer that happened, definitely need a replacement regulator. I am pretty sure the part number is this 34-33-1-153-303-BOE. Cheapest (not used) is what I saw here (almost 5 bills, most other places are 800) [You must be registered and logged in to see this link.]

There are plenty of BMW dismantlers out there, I only saw a complete sytem on eekbay for $799, not exactly attreactive. These come up frequently there if you are patient. Good luck with the search.

Mike
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Re: bmw hydro boost bomb "blew"

Post  tkrame944 on Tue Apr 09, 2013 10:34 pm

I found one on ebay with the booster for nearly $200 i guess thats my best bet. A nice kick in the teeth for already having that stuff

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