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Old 01-09-2020, 10:33 AM   #1
Archbid
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Name this line. Help!

Took off the manifold and found a broken line coming up from the fuel filter area. It is hard black plastic about 3mm OD 1mm ID.

It is not the fuel filter hose the connects to the intake boot, and it is not rubber, it is rigid.

So sorry I have no picture!

Ideas?
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Old 01-09-2020, 10:59 AM   #2
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I usually use https://www.realoem.com/bmw/enUS/sho...diagId=11_3411
To find diagrams and part number

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Old 01-09-2020, 11:03 AM   #3
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Yes I am well-versed in real oem. I looked at engine and fuel diagrams and can't figure what line it is
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Old 01-09-2020, 11:05 AM   #4
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The FPR line transitions from rubber to hardline back to rubber as it progresses from the F-connector to the filter.
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Old 01-09-2020, 11:22 AM   #5
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Quote:
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The FPR line transitions from rubber to hardline back to rubber as it progresses from the F-connector to the filter.
That is the one! Do I need to use the $80 part or can I just use silicon vacuum tubing?
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Old 01-09-2020, 11:24 AM   #6
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That is the one! Do I need to use the $80 part or can I just use silicon vacuum tubing?
Any bit of snug fitting rubber line will do. It's a breather, not a fuel delivery line.
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Old 01-09-2020, 11:44 AM   #7
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Yes you can use generic hose or tubing. The old school cars used such to vary the fuel rail pressure between idle/near idle, high vacuum and lower fuel pressure.
Acceleration the engine looses vacuum and the fuel pressure went up ~.5 Bar.

Now although it's still hooked to the regulator, it's a safety device.
It's very rare, but sometimes the diaphragm in the FPR can tear. If it should, this would deliver fuel into the intake manifold and not have a fuel leak.

A cracked hose can be a source of a vacuum leak.
I'd recommend hard plastic line over a long length of vacuum hose for a myriad of reasons.
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Old 01-09-2020, 12:50 PM   #8
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Is it this line showing in the vid?

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