Discuss the RB20, RB25 and RB26 series engines.

Need RB26 Valve lash shims

Need RB26 Valve lash shims

Postby boostedh23a1 » Sat Jun 16, 2012 2:21 pm


Nissan part numbers pn followed by thickness
(1) 1322905u72 2.98mm
(2) 1322905u69 2.935mm
(1) 1322905u70 2.950mm
(3) 1322905u64 2.86mm
(2) 1322905u65 2.875mm
(1) 1322904u19 3.310mm
(1) 1322904u17 3.28mm

thats 11 (grabbing one of the slightly smaller ones incase the big one is too big.)
Can anyone get these?
Datsun 240z- Built R.I.P.S. RB30, Endyn RB26 Head, AEM S2 EMS,To4z, R.I.P.S. Intake Manifold, Tomei Oil Pump, Carbonetic Twin Disk, R230 Differential, etc...
http://forums.nicoclub.com/post6090152.html#p6090152
http://forums.hybridz.org/index.php/topic/96953-my-240-rb26-build/ (most up-to-date)
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Re: Need RB26 Valve lash shims

Postby Ramius83 » Sun Jun 17, 2012 6:44 am

Nissan Master Tech
1995 240sx SE-RB26DETT swap......11.86 1/4 Mile Time at 121MPH, stock RB26, 14.5lbs of boost, stock suspension, slicks.....Currently in the second Build Process.....Have gone another route, even more radical.....HEHE!!!!!!!
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Re: Need RB26 Valve lash shims

Postby boostedh23a1 » Sun Jun 17, 2012 6:55 am

12.3 diameter or 11.5? I measured one and it was 12.1 if memory serves me right. Car is at my shop at the moment.
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Re: Need RB26 Valve lash shims

Postby Ramius83 » Sun Jun 17, 2012 7:30 pm

I am not sure, engine is installed and can't measure them. If you email/call them, he will tell you what size he always uses for RB26s......He never asked me when I ordered mine, twice.....
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Re: Need RB26 Valve lash shims

Postby boostedh23a1 » Sun Jun 17, 2012 8:02 pm

Probably the 12.3. How. Long did it take to get them?
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Re: Need RB26 Valve lash shims

Postby julio » Mon Jun 18, 2012 7:20 am

12.3mm is the correct size. I only have shims that will satisfy the 2.875mm sizes, none of the rest. Its probably easiest to get them all from precision shims. I ordered some from Japan and then some from them and the ones from aussie land came first.
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Re: Need RB26 Valve lash shims

Postby gawdzilla » Wed Jun 20, 2012 8:06 am

good to know you can buy these now. when i shimmed my motor back in the day i made a spreadsheet with all the thicknesses needed vs. what I had. Then mixed and matched all 24 shims to get whatever I could to fit within spec, then took about half of them to get ground down at a machine shop. Obviously you can't add thickness if you need to, but it ended up working out well for me.
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Re: Need RB26 Valve lash shims

Postby boostedh23a1 » Tue Jun 26, 2012 6:54 pm

bah! got them in today all are in spec now except for 2.. son of a b****.
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