Miks15
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| posted on 29/12/09 at 01:25 PM |
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using vacuum hoses
Can i use vacuum hose between the expansion bottle and the main coolant system, i assume its not under any real pressure since it goes up to the
expansion bottle.
And vacuum hose is a fair bit cheaper, and easier to shape than actual coolant hose.
Cheers
Mikkel
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will121
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| posted on 29/12/09 at 01:28 PM |
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it will be under the same pressure as the coolant system, should be reinforced hose really
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r1_pete
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| posted on 29/12/09 at 01:28 PM |
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Your BMW engine wil run a header tank, not an expansion bottle, so it is under pressure, you need to use reinforced coolant hose.
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britishtrident
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| posted on 29/12/09 at 01:29 PM |
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You need hose rated for up to 3 bar internal pressure.
The whole cooling system is under pressure, the only expansion bottles that aren't under pressure are those that are open to the atmosphere and
are connected to the overflow from the pressure cap as on many japanese cars.
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Miks15
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| posted on 29/12/09 at 01:31 PM |
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OK, cheers all,
Im ok to use vacuum hose for the breather from the top of the rad to the header tank then?
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r1_pete
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| posted on 29/12/09 at 01:36 PM |
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quote:
Originally posted by Miks15
OK, cheers all,
Im ok to use vacuum hose for the breather from the top of the rad to the header tank then?
No, that too is under pressure, you could only use it on the overflow from the header tank
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Miks15
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| posted on 29/12/09 at 02:13 PM |
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OK then cheers
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StevieB
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| posted on 29/12/09 at 03:05 PM |
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I've managed to use vaccuum hose for the breather from rad to header without problems either on road or on track days.
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BenB
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| posted on 29/12/09 at 03:45 PM |
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I wouldn't. I had some old coolant hoses that bulged dramatically when the engine was running. Shows how much pressure there is in the whole
coolant system. The thought of one going pop (and the consequential rapid overheat and engine seizure) put me off using old hoses....
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indykid
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| posted on 29/12/09 at 10:42 PM |
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petrol pipe has always been dirt cheap when i've bought it
tom
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boggle
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| posted on 29/12/09 at 10:49 PM |
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wrapped silicone hose is ok but vacum hose has a tendancie to split under high preassure....
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