RB25DET NOT GETTING OIL TO THE HEAD

Discuss the RB20, RB25 and RB26 series engines.
redrbz
Posts: 28
Joined: Thu Aug 23, 2012 9:26 pm
Car: 260z rb25

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I JUST GOT DONE REPLACEING MY NEW HEAD GASKET ONTO MY MOTOR. FOR SOME REASON I AM NOT GETTING ANY OIL TO THE HEAD. I START THE CAR AND DISCONNECT THE OIL RETURN LINE FROM THE HEAD AND NO OIL IS COMING OUT OF IT. I WONDER WHAT COULD BE THE PROBLEM.

I NO FORSURE IT ISNT THE OIL PUMP BECAUSE I AM GETTING OIL TO MY OIL FILTER.


RRRRB
Posts: 759
Joined: Wed Jun 01, 2011 9:31 am
Car: 98 RB powered S14
Location: WA

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There is likely no problem that return line wont have a solid flow of oil until you get lots of oil into the cylinder head... at a light idle the other drains are likely doing the majority of the work

redrbz
Posts: 28
Joined: Thu Aug 23, 2012 9:26 pm
Car: 260z rb25

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with both valve cover off the head, and engine running. doesn't see any oil dripping or splashing out :(. i wonder where is the head getting oil from?

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Carl H
Posts: 5985
Joined: Mon Aug 04, 2003 4:09 am
Car: 1995 Nissan 240SX SE RB30DET

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did you put the gasket on backwards?
it really can only go on one way properly but i have seen these things done before.

if you're not getting oil to the head it will be quite apparently as the hydro lifters will collapse and it will have all kinds of fun noises coming from the head.

redrbz
Posts: 28
Joined: Thu Aug 23, 2012 9:26 pm
Car: 260z rb25

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I'm sure the head gasket is on right. The 10mm bolt on each corner of the head all line up and screw in perfect. My lifter sounds so loud. Anymore suggestion?

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Carl H
Posts: 5985
Joined: Mon Aug 04, 2003 4:09 am
Car: 1995 Nissan 240SX SE RB30DET

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did you bleed the lifters before you installed them?

were the oil feeds blocked at all?

Darius
Posts: 4820
Joined: Sun Mar 02, 2003 9:48 am
Car: RB25DET S14 - 665 WHP (SOLD)
Location: Chicagoland

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Slipped oil pump drive? Is your oil pressure sensor wired into your dash to indicate lack of pressure and turn on the light?


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