02GF74
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| posted on 9/2/09 at 10:47 AM |
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M6 bobbin - where? RS?
Ok, I've become obsessed wtih trying to make my solid state facet fule pump run quieter in the Landy.
I fitted DIY soft rubber washers between pump and body and it makes it a bit quiter but not as quiter when the pump is in free air.
I can feel vibration in the metal frame so suspsct this is being transferred via the bolts.
Hence my quest to find an M6 rubber bobbin - basically a cylinder of rubber with an M6 stud poking out either end.
Aslo seem to recall someone saying RS sell them but not found anything as yet.
Anyone know?
Or how to make own version? Thinking of using a rubber hose and holding M6 studding via a pin.
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lsdweb
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| posted on 9/2/09 at 10:49 AM |
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Motor Factors?
I think they were used on something like a MG Metro Turbo - oil cooler mounts?
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vinny1275
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| posted on 9/2/09 at 11:01 AM |
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like this?
Cheers
Vince
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vinny1275
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| posted on 9/2/09 at 11:01 AM |
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like this?
Cheers
Vince
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contaminated
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| posted on 9/2/09 at 11:27 AM |
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Halfrauds and Burtons do them as well. My exhasust is mounted with two of them.
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02GF74
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| posted on 9/2/09 at 11:39 AM |
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ok, found 4 candidates on RS site
298-3036 60 sh 1.2 x 34 £ 2.01 + VAT
298-3020 45 sh 1.2 x 18 £ 2.01 + VAT
442-533 45 sh 1.2 x 9 £ 3.55 + VAT
442-511 35 sh 1.2 x 6.3 £ 3.55 + VAT
so lower sore number, and smaller size means sofyter part, as shown by the no. mm deflection per kg force.
Question is will the softest part 442-511 be noticeably more effective than the cheaper 298-3020 part?
I gues I can always drill holes in the rubber to make it even softer?
Anyone have any feel about this?
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MikeRJ
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| posted on 9/2/09 at 11:43 AM |
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Use the softest ones possible, but make sure they are mounted in compression, not shear or tension otherwise they can fail quite quickly.
Also consider the transmission of noise along the fuel pipes. If they are quite hard rubber than no amount of isolation on the pump will completely
remove the noise.
[Edited on 9/2/09 by MikeRJ]
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pewe
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| posted on 9/2/09 at 11:46 AM |
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Ford Transit rad mounts. Cheers, Pewe 
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02GF74
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| posted on 9/2/09 at 11:53 AM |
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quote:
Originally posted by MikeRJ
Use the softest ones possible, but make sure they are mounted in compression, not shear or tension otherwise they can fail quite quickly.
oooh, are you trying to bankrupt me!!! Think you are right though. 
I have to mount the pump on its side so the bobbin studs are horizontal - i.e, bobbin is in tension. They are rated for 1.6 kg but I cannot imagine
the pump plus the hoses, which are held to body work almost making the pump self supporting coming anywhere near that. I guess if they fail, then I
go for the cheaper bobbins.
Also consider the transmission of noise along the fuel pipes. If they are quite hard rubber than no amount of isolation on the pump will completely
remove the noise.
true but there is quite a noticeble difference of clicking noise when pump is free to a thumping noice when mounted.
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omega 24 v6
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| posted on 9/2/09 at 12:28 PM |
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Vauxhall cavalier/astra/carlton etc with the external fuel pump used them for mounting the pum braket to the chassis to cut down on noise,
If it looks wrong it probably is wrong.
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nick205
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| posted on 9/2/09 at 12:50 PM |
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You can hear the pump when driving along in the Landy can you? 
You must have a super smooth and quiet Landy (unlikely) or a seriously noisey pump.
Local mtotr factors shoul have Mini exhaust bobbins for peanuts. Not M6 IIRC, but not far off.
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MikeRJ
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| posted on 9/2/09 at 12:59 PM |
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quote:
Originally posted by nick205
Local mtotr factors shoul have Mini exhaust bobbins for peanuts. Not M6 IIRC, but not far off.
7/16" UNF I think. They are quite hard rubber though.
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02GF74
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| posted on 9/2/09 at 01:00 PM |
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eeek!! price is each, and sold as 4 per pack.
need to think of alternative..... actually, thinking aqbout it, there have been many times I have had to clear the nozzleof pu type adhesives, strong
but flexible, now I reckong this can be used in a mould to hold two bolts together or stud welded to a washer, hmmm.......
[Edited on 9/2/09 by 02GF74]
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pocket rocket
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 posted on 9/2/09 at 07:40 PM |
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could you use 4 of these rubber mounts (one in each corner) and a steel plate to mount one side of an engine or would you need bigger ones?
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02GF74
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| posted on 10/2/09 at 08:20 AM |
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from how I understand the spec, 2 should be ample.
due to twin underseat tanks, the pump is mounted under the driver's seat and is only heard when eninge is off and idling - I think, something t
hat I have lieved with for years but gives me something to do - ain't paying £ 14 !! 
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