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Discussion Starter #1 (Edited)
And yet another problem i'm trying to solve. Recently i used to get 15-20 psi of oil pressure at idle and 50-60psi at 3k rpms. but recently my oil pressure dropped to 10-13 psi idle to 40-45 psi 3k rpms.

Its below minimum spec, the pressure still climbs to the rule of thumb 10psi for every 1k rpm, its just lower than stock specs. should i be worried? I dropped the oil pan and didnt see any metal shavings, nothing in the oil pick up screen.. theres no knocking or grinding. i just dont know if its serious or not. what do you guys think?


ps> ive had low oil presure before and usually the pressure doesnt climb at all, but this time the pressure does climb but its just lower than usual.

please help a confused memeber out



update: bearing pics on page 2
 

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Discussion Starter #2
btw i'm using 15w-40 shell rotella motor oil. when draining the oil to drop the oil pan i noticed the oil was like water very very thin for supposed thick oil. maybe i'm bugg'n but thought i should throw it out there..
 

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Discussion Starter #4
Well the rotella is really not all that thick but I would be a bit worried be better to drop the pan and replace the pump now then wait till you spin a bearing and do a rebuild. But when did you get low oil pressure before? same pump as well?

yup using the same oil pump. it was pumping good before. if it was bearing clearances, wouldnt it bearing material in the oil pan? i havnt seen any yet. i should get a magentic oil drain plug.


Do you really think its the oil pump?
 

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Classic Man
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Do you really think its the oil pump?
he gave you an educated guess

now you need to decide, do YOU think it is the oil pump?

its either the pump, or the bearings.

pick one
 

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Discussion Starter #6
he gave you an educated guess

now you need to decide, do YOU think it is the oil pump?

its either the pump, or the bearings.

pick one


your right. i'm just so sick and tired having to pull the motor every single time something goes wrong with it.
 

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the short bus
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It could be the feed like or something else using the oil pressure. kinda in the feed line? if its electric it could be the ground issue.
Its also really fucking hot out. That makes my oil pressure drop around 5-6 psi. thats with synthetic.
How loose did you go on the clearences for the bearings? loose gets looser over time.
 

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Discussion Starter #8
It could be the feed like or something else using the oil pressure. kinda in the feed line? if its electric it could be the ground issue.
Its also really fucking hot out. That makes my oil pressure drop around 5-6 psi. thats with synthetic.
How loose did you go on the clearences for the bearings? loose gets looser over time.

yeah your right its also really hot. i just dont want to spin bearing cause if i do thats it i'm done cant afford another build because of recent issues that came up.

the rod bearings i remember were .0015 in the green section of the oem honda chart. i totally forgot the main bearings but there were in the green section as well. its been over a year since building.
 

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Discussion Starter #10
I hope you figure it out maybe wait till later this afternoon when it does cool down and see where you are at then.
yeah it should cool down this afternoon. i'll make a quick video of the oil pressure gauge maybe the experts can tell me if its a problem or not
 

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10 second daily driver :)
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remember bearings make the pressure the pump supplies the volume. how ever i would try a filter and oil change first. throw some normal 1040 in there, like Valvoline or castrol
 

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im running 5-30 mobil non syn and am geting the same pressure reading

stock 240k z6 at 11psi

in for more more info instead of starting another topic
 

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You said the oil was like water when you drained it out. I would say your oil just broke down. Try putting a different brand but same viscosity in it first and see if that fixes it. I would try that first.
 

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Classic Man
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remember bearings make the pressure the pump supplies the volume. how ever i would try a filter and oil change first. throw some normal 1040 in there, like Valvoline or castrol
:bigok:

you didnt happen to add a feed line for your turbo did you? i noticed when i added my turbo feed my pressure dropped a good 10-15psi at WOT and startup
 

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You said the oil was like water when you drained it out. I would say your oil just broke down. Try putting a different brand but same viscosity in it first and see if that fixes it. I would try that first.
I would try this first. About a month ago my oil pressure would sit from 10psi to about 6psi with full synthetic. I put the synthetic bland in and my oil pressure now sits at 20psi at night and about 12psi or 10psi during the day when its about 102 degrees out.
 

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i been using valvoline VR1 20/40. on my auto meter oil gauge is always reading very nice at idle about 20-25 and over 3k is 60/70. from all the oils i have used this one last and it keep the consistency for a decent time.
 

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ej2
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Discussion Starter #19
I did shim the oil pump thats like the easiest thing to do. but it doesnt do squat once the oil reaches operating temp.

Has anybody ported there oil pump? If so how much did the pressure go up?
 
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