 | Home > Td5 > TD5 Fuel pressure |
 
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| stu-pid Member Since: 12 May 2011 Location: kent Posts: 1   
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The pressure after the fuel has gone through the pressure regulator should be a fairly consistent 4 bar even at high revs, the pressure before the regulator direct from the pump is normally around 7 bar. No idea about the return pressure through the cooler though.
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26th Oct 2011 6:16pm |
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| twopoint6khz Member Since: 18 Aug 2011 Location: North Lakes Posts: 654 
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How do you know the gauge is anything like accurate? Was it taken from a calibrated instrument? Often things like that can be 'indicative' at best...
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26th Oct 2011 6:46pm |
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| Zinke Member Since: 27 Jan 2009 Location: Scunthorpe Posts: 670 
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""The two stage pump comprises a high and low pressure stage. The low pressure stage draws fuel from the swirl
pot through a filter. The low pressure stage pumps fluid at a pressure of 0.75 bar (10.9 lbf.in) and a flow of 30 litres/hour (8 US Gallons/hour) to the fuel filter. A proportion of the fuel from the low pressure stage also passes, via a restrictor, through a jet pump which keeps fuel circulating in the swirl pot. The high pressure stage draws the low pressure fuel from the fuel filter and pressurises it to a pressure of 4.0 bar (58 lbf.in). The pressurised fuel is then passed from the pump to the injectors at a flow of 180 litres/hour (47.6 US Gallons/hour). A fuel pressure regulator is located at the rear of the engine and ensures that the delivery pressure remains at 4.0 bar (58 lbf.in) by controlling the amount of fuel returning to the fuel tank."" |
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26th Oct 2011 8:36pm |
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| Steve B Member Since: 22 May 2009 Location: Warwickshire Posts: 586 
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Hi Zinke,
Thanks for the reply, I completely missed it until looking for my post to reply to another 
Steve  |
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19th Nov 2012 10:13pm |
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| AlexLandy10 Member Since: 03 Nov 2012 Location: Ipswich Posts: 15 
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that looks just like the bit of kit i need to test my fuel pressure, would you be willing to lend it or make another one for some shiny coins, its a last straw attempt to make my td5 sound like it should instead of a tractor. If at first you don't succeed, hit it harder or get someone else to do it.
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20th Nov 2012 6:49pm |
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| wslr Member Since: 18 Jul 2010 Location: Wellington, Somerset Posts: 581
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Alex - If you PM me I can probably have one made up for you if you like. Would be around the £80 mark though.
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20th Nov 2012 8:48pm |
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| Steve B Member Since: 22 May 2009 Location: Warwickshire Posts: 586
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Hi Alex, Your welcome to use it if you are passing. Have you kept your old prv block for the donor pipes? Wslr's offer sounds good, by the time you have all the parts and your time... Steve |
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21st Nov 2012 9:54pm |
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| AlexLandy10 Member Since: 03 Nov 2012 Location: Ipswich Posts: 15
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Hi, thanks for the replies, i haven't got the old regulator as it was returned to the supplier for them to return to the manufacturer, Ill let you know if im passing Steve B and WSLR i might be giving you a shout if i decide to get a pressure gauge made, a local Landy garage have said that they have a kit for testing the pressure so goin to give them a try first, they have said that i can take my regulator off and check the filter behind and just fit a new gasket and o ring, is this a wise move or not? If at first you don't succeed, hit it harder or get someone else to do it.
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28th Nov 2012 11:57am |
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| me@td5.org Member Since: 16 Jan 2011 Location: Warwick Posts: 856
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Off topic but what other exciting things have you got going on under the bonnet? Is that a catch tank of some sort on the bulkhead?
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28th Nov 2012 6:12pm |
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| Steve B Member Since: 22 May 2009 Location: Warwickshire Posts: 586
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Yes. Just a cheap one of ebay.
Just air and diesel going into my engine, no egr or blow by. The only benefit really is no oil build up in the intercooler. Emissions still ok. Steve |
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28th Nov 2012 7:10pm |
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| me@td5.org Member Since: 16 Jan 2011 Location: Warwick Posts: 856
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I've been looking at a few mods to reduce the oil mist going into the breather and also maybe fitting a catch tank or a filter with an oil return.
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28th Nov 2012 7:33pm |
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| Steve B Member Since: 22 May 2009 Location: Warwickshire Posts: 586
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This was my thoughts too, also should an engine problem arise it should reduce the chance of running on its own oil?
One point, if you do it make sure the pipes and tank breath freely. Any restrictions and the crank case pressure will be too high and seals/ gaskets will leak. Steve |
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28th Nov 2012 8:00pm |
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| excossack Member Since: 22 Feb 2012 Location: North West Posts: 5850 
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Sorry to HiJack Slightly
/HiJack On So the oil breather catchtank is connected as follows: Rocker breather hose goes into a catch tank, then the oulet of the catch tank then reconnects to the original breather pipe and then any engine oil gets caught in the tank and does not (or reduced) enter into the Intercooler which in turn does not get into the inlet side and dragged through the engine? /HiJack Off 1999 Defender TD5 110 Regards John M0VAZ Econet Station 48 no clock |
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29th Nov 2012 11:52am |
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| Steve B Member Since: 22 May 2009 Location: Warwickshire Posts: 586
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Yes that's right, or you can just vent.
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29th Nov 2012 10:11pm |
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