RB20 Rebuild - Oil Pump question

Discuss the RB20, RB25 and RB26 series engines.
smitty4130
Posts: 50
Joined: Sun Jan 11, 2009 4:55 am
Car: 95' S14 w/RB20DET, 03' BMW 330Ci

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I can't remember how this came out.

Like this?

Or like this?

Thanks Guys.


mott6904
Posts: 679
Joined: Tue Jan 30, 2007 2:50 pm
Car: rb20 big turbo big cams s13, 97 kouki, turbo audi a4,turbo busa

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I would say neither. the hole you are sticking that into is the oil supply for the oil pump and you will be blocking it. Did you take apart the oil pump? That looks like the part of the pressure relief valve. I think the spring sits in this

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gmac708
Posts: 1914
Joined: Thu Jul 31, 2008 1:59 pm
Car: :o)
1970 Datsun 240Z
1972 Datsun 510

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errr...I think your 1 hole off if that's the dowel pin. The piston for the pressure reg goes in from the bottom of the pump, not he back...I think...

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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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that looks like part of the pump...

smitty4130
Posts: 50
Joined: Sun Jan 11, 2009 4:55 am
Car: 95' S14 w/RB20DET, 03' BMW 330Ci

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It defenetly came out of that hole but it was in the pump when i disassembled. I think it has something to do with pressure. Anyone have any idea???

PS carl where's my harness?

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Nissan2367
Posts: 322
Joined: Sat Oct 25, 2008 10:15 am

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smitty4130 wrote:PS carl where's my harness?
Ouch called out!!!

It looks like it came out of the pump... if it went in that hole it would block the oil from going through the engine!

mott6904
Posts: 679
Joined: Tue Jan 30, 2007 2:50 pm
Car: rb20 big turbo big cams s13, 97 kouki, turbo audi a4,turbo busa

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Dont put that in any of the holes on the front of the block you will screw yourself. There is a 8 or 10mm allen bolt in the bottom of the pump. Pull the spring out and slide the sleeve over top the spring, then slide the spring back in the pump starting with the sleeve.

smitty4130
Posts: 50
Joined: Sun Jan 11, 2009 4:55 am
Car: 95' S14 w/RB20DET, 03' BMW 330Ci

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I was afraid this was going to be the responce. ANy chance anyone has a spring and could give me the dimentions and spring rate? The plug and spring are completly missing.

smitty4130
Posts: 50
Joined: Sun Jan 11, 2009 4:55 am
Car: 95' S14 w/RB20DET, 03' BMW 330Ci

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Found the spring and bolt. All is well. I wouldn't have figured this out if it werent for you guys. Thanks!

mott6904
Posts: 679
Joined: Tue Jan 30, 2007 2:50 pm
Car: rb20 big turbo big cams s13, 97 kouki, turbo audi a4,turbo busa

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Good deal...that would have sucked if you put it all back together and tried to build oil pressure and you got nothing.


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