rb25 injector "Isolators" ??

Discuss the RB20, RB25 and RB26 series engines.
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300Plus
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Joined: Sat Jul 09, 2005 8:11 pm
Car: 1995 S14 w/ Rb25det Series II

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Hey guys, I'm trying to find the rubber rings that push into the intake manifold runners that act as a seal between the injectors and the intake. I was told they are called isolators and not o rings like I previously thought ANY help would be awesome, need 6 asap. A part number would be awesome !


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nizmo zilvia
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Joined: Thu Jul 07, 2005 5:09 pm
Car: 95 240sx w/ S14 SR20 Blacktop

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Wouldn't 91+ 240sx injectors work since its the same? Im using SOHC isolators from a 240sx and they work fine. Try giving it a shot? Good luck.

minivan_don
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Joined: Fri Apr 23, 2004 7:29 am

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i just bought them the other day ... 16636-72P00

sxracerb25
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Joined: Mon Feb 20, 2006 8:27 pm
Car: 1990 Nissan 240sx

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http://www.courtesyparts.com/M...72P00 there if you want a link to a site with them

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nizmo zilvia
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Joined: Thu Jul 07, 2005 5:09 pm
Car: 95 240sx w/ S14 SR20 Blacktop

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HOLY SMOKES! I paid a bit over $3 at my dealer. Damnnnnn.

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300Plus
Posts: 700
Joined: Sat Jul 09, 2005 8:11 pm
Car: 1995 S14 w/ Rb25det Series II

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AWESOME! thanks guys great info , I would order from courtesy but need them asap and my infinitiy dealer can get them tomorrow for 2 bucks each. From what I was told it looks like they are the DOHC KA isolators and "certain year VQs" Thanks agains guys.

Anyone have a copy of the FAST program ? might help prevent these threads coming up from me lol

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mello88
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Car: s13

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I just replaced an injector on my KA motor and needed one of those rings. You're talking about the fat rubber ring, right? About 1" diameter, 1/4" thick? It goes into the inset area of the manifold to seal the injector.. I looked all over hell for them (locally), and none of my local dealers had them in stock....

I eventually found them at Autozone or Checker. They're sold as part of an "Injector O-Ring Seal Kit" for a 91-94 KA24DE 240SX. GL

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300Plus
Posts: 700
Joined: Sat Jul 09, 2005 8:11 pm
Car: 1995 S14 w/ Rb25det Series II

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mello88 wrote:I just replaced an injector on my KA motor and needed one of those rings. You're talking about the fat rubber ring, right? About 1" diameter, 1/4" thick? It goes into the inset area of the manifold to seal the injector.. I looked all over hell for them (locally), and none of my local dealers had them in stock....

I eventually found them at Autozone or Checker. They're sold as part of an "Injector O-Ring Seal Kit" for a 91-94 KA24DE 240SX. GL
Yea talking about the same thing. How much were they from autozone? hard to beat the 98 cents from courtesy.


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