engine oil pressure - where did it go?

hermione149

hermione149

Member
hi,i have an oil pressure problem,once the engine is warm the pressure drops to 0psi & oil light comes on.recon bottom end 17000mls,used different oils etc,checked gauges,senders,even fitted a separate oil gauge,could head gaskets be faulty?,
 
Does your separate pressure gauge confirm no oill pressure ?
If so I think you've got problems with your bearings or the oil pump. Was the crank ground to the right size ? I can't see head gaskets affecting oil pressure
What is your cold oil pressure ?
You could check that your sump has not been dented in and covering the oil pick up. That would be a simple fix
Dave
 
hi dave,when i first fitted this engine in the pressure went off the gauge when cold,settle down to 30/35 psi when hot,now when i fire up it goes upto about 40 psi,as temp increases, pressure drops,this is also confirmed by use of a seperate gauge,0psi below 1500rpm when hot,there is no rumble associated with mains wear(had a p5b,sounded like a wellington in a tumbledryer),the sump is free of any damage,pressure measurements are taken from oil light switch,there are no nasty rattles apart from the odd cam follower,originally this engine was destined for a race preped tr8,oil filter housing was changed to suit p6 . kind regards ,kevin
 
I would suggest looking at your oil pump. Check to see the oil pressure relief valve and spring are in good condition; easy and cheap to fit new parts - you would need to prime the oil pump though - not so easy and quick.
 
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