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IvailoSK
Newbie
Joined: Aug 17, 2010
Posts: 1
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Posted:
Mon Oct 22, 2012 5:27 am |
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Time to time after first engine starting , oil pressure is 0.Needs to increase RPM and it is going to 6 atm. then after engine heating to 90C , dropping to 1 atm. |
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Mikes2
Site Moderator
Joined: Jan 31, 2003
Posts: 9144
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Posted:
Mon Oct 22, 2012 2:46 pm |
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what engine is this on ?
no oil pressure usually means exactly that. oil pump fail or blocked pickup is the most common.
Don't run it until you've investigated or you'll cause more problems |
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scotty33
UltraUser
Joined: Mar 18, 2005
Posts: 1570
Location: Gwent
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Posted:
Mon Oct 22, 2012 10:32 pm |
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maybe needs a genuine oil filter, some aftermarket ones do not have a non return valve inside. Without this it takes longer to reach normal pressure. |
_________________ Coupe 20V 1990 X 2
Passat sport tdi 2001 X 2 |
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j2000_1973
Inexperienced
Joined: Oct 30, 2012
Posts: 28
Location: Falkirk
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Posted:
Sun Nov 04, 2012 12:28 pm |
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do you have to take the engine out to get at the oil pump ? |
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Mikes2
Site Moderator
Joined: Jan 31, 2003
Posts: 9144
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Posted:
Sun Nov 04, 2012 5:19 pm |
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not normally no. it's a fair bit of work though |
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j2000_1973
Inexperienced
Joined: Oct 30, 2012
Posts: 28
Location: Falkirk
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Posted:
Mon Nov 05, 2012 6:17 pm |
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I've got the same problem.
Oil pressure gauge goes to max on ignition but goes to zero on turnover and running. There is plenty of oil in engine and oil splashing up dip stick when running. Could a sensor be u/s ?
anyone got any suggestions? |
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scotty33
UltraUser
Joined: Mar 18, 2005
Posts: 1570
Location: Gwent
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Posted:
Mon Nov 05, 2012 9:14 pm |
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Oil will splash up the dipstick tube, this is not an indication of oil pressure. The hydraulic Tappets are one of the last things on the oil delivery side, if they run quiet, when the engine is hot, you have at least some oil pressure.*
*hydraulic Tappets are generally noisy when first starting, and when warming up in some cases, it is also not unusual for 1 or 2 to be a bit noisy even when warm, but if oil pressure is low all 10 will complain..
the other thing with the NG engine, is it has a vacuum pump which often sticks, when it does so, it apparently sounds like failing hyd Tappets.
So not a brilliant test in this case, but if you really want to know, replace the sensor, or rig up a pressure gauge. |
_________________ Coupe 20V 1990 X 2
Passat sport tdi 2001 X 2 |
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IanW_home
Bandwidth Buster
Joined: Feb 02, 2003
Posts: 706
Location: Reading
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Posted:
Tue Nov 06, 2012 5:52 pm |
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Quote: | I've got the same problem.
Oil pressure gauge goes to max on ignition but goes to zero on turnover and running. There is plenty of oil in engine and oil splashing up dip stick when running. Could a sensor be u/s ?
anyone got any suggestions? |
Is it possible that the oil pressure gauge is wired up to the oil pressure switch on the block?
The fact that you have maximum oil pressure with the ignition on, but the engine not turning, suggests an electrical problem rather than an oil pressure problem.
Ian. |
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j2000_1973
Inexperienced
Joined: Oct 30, 2012
Posts: 28
Location: Falkirk
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Posted:
Sun Dec 09, 2012 8:20 pm |
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... not sure I know what you mean. How can I check? |
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scotty33
UltraUser
Joined: Mar 18, 2005
Posts: 1570
Location: Gwent
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Posted:
Mon Dec 10, 2012 6:57 pm |
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There is a pressure sender for the gauge and pressure switch(es?) for the alarm. I think 16 is the sender, and 14 is a switch, not sure if there are 2 switches? Maybe Item 1?
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_________________ Coupe 20V 1990 X 2
Passat sport tdi 2001 X 2 |
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Mikes2
Site Moderator
Joined: Jan 31, 2003
Posts: 9144
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Posted:
Mon Dec 10, 2012 7:47 pm |
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That illustration is for a 5 cylinder.
16 is the gauge sender but is also a switch. 1 and 2 are the switches - high and low oil pressure. For cars which don't have an oil pressure gauge in the centre console, you'll have a switch (2).
14 is for oil temperature so unrelated. |
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