oil pressure light

[rocky2008]

today i have realligned my timing and rebuilt that side of the enginge, how ever, once the car reachs 90degrees and you start to rev it the oil pressure light comes on, but when it is just ticking over at 90degress it is ok, i removed the sender to see if there was any oil at the top of the engine and it spewed out oil at a fair rate so there is deffinatly pressure, also the oil pump pully is as tight as it will go so theres no way the pump is slippng, yet the light still comes on, maybes there pressure return valve is sticking open? does anyone have any ideas? thanks.

 

[cheshire cat]

I guess the first thing is to play safe and fit a guage in there even if only temp' just to make sure,---- it could just be the switch, but better to know it's only a faulty switch before reving it too hard

 

[rocky2008]

yeah, put a gauge on it this morning and its saying very minimul, so we think that now there could be some muck in the oil pressure relief valve.

 

[Nath.]

Maybe you have a crank case breather pipe loose or split?

 

[cheshire cat]

book sez-- "bring up to 80'C @2000 revs" there should be "at least 2 bar" five seems about normal and 7 bar is a fault somewhere, hope this helps

 

[rocky2008]

not to sure mate i will have to check, but what seems to be the most likely cause is either a dodgy pump, or the pressure relief valve is sticking open, i am going to strip the pump, and replace the filter somepoint this week, absolute nightmare though

 

[cheshire cat]

yeah, put a gauge on it this morning and its saying very minimul, so we think that now there could be some muck in the oil pressure relief valve.

or a blocked filter

 

[rocky2008]

book sez-- "bring up to 80'C @2000 revs" there should be "at least 2 bar" five seems about normal and 7 bar is a fault somewhere, hope this helps

yeah i read that to lol, mine is fine when it is ticking over, but when under load has about 5PSI which is absolutely bummer all lol

 

[rocky2008]

or a blocked filter

could be the case mate, filter is only 5pound for mine, how ever it seems to be the leons that are common for blocking filters etc.

 

[Nath.]

yeah i read that to lol, mine is fine when it is ticking over, but when under load has about 5PSI which is absolutely bummer all lol

Sounds like a classic case of a split crank case breather pipe to me, this is the one that goes from the crank case to the inlet manifold. If there is a split you will loose more crank case pressure the higher the revs go

The same split or loose pipe normally causes an erratic tick over too.

 

[rocky2008]

Sounds like a classic case of a split crank case breather pipe to me, this is the one that goes from the crank case to the inlet manifold. If there is a split you will loose more crank case pressure the higher the revs go

The same split or loose pipe normally causes an erratic tick over too.

how hard will that be to check on the 1.2 3cylinder engines? and how much would as new pipe be? a few quid or so?