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Discussion Starter · #1 ·
whats the best way to grind an rb 26 shim can you do it with agricultural tools such as a bench grinder or maybe a hand file or does it require much more sophisticated machinery ???
 

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You NEED to use a surface grinder. Eg, proper equipment. the shims are as hard as the file. An angle grinder will just wreck it. They need to be parallel to 0.01mm
 

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Discussion Starter · #6 ·
did a google on surface grinders yes specialist equipment indeed not somthing you would buy for one build
 

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Certainly not , although i do have one about a foot from my bench at work .
Although that doesnt help much. :(

Check your local yellow pages for engineering machine shops. :)
 

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Discussion Starter · #8 ·
the head is with a machine shop but i was going to take it back and shim it myself to hurry things up because the motherf*****s are holdin up my build for the last month ah well sure ive nothing else to be doing christmas week:mad:
 

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you don't even need to grind the shims at all, as part of a normal freshen up they should machine the valve tip, do a dummy assembly, measure your clearances, move shims around as needed to get as many correct as possible and 'tip' the other valves as needed to get them all correct. Rob
 

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Discussion Starter · #10 ·
you see my problem was with the new hks cams the stock shims were too small i didnt have correct measurements so i ordered the biggest size the supplier had on da shelf and will have to grind to suit
 

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Which cams do you have?........ - on the higher lift cams (step 3) they drop the base circle which necessitates the use of thicker buckets.
 

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Discussion Starter · #12 ·
there step 2 272deg i guess the base circle is dropped in them a bit aswell but buckets aint required just bigger shims it seems
 

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You need a small surface grinder, best to buy a few thin shims, get measurements for the sizes you need and buy them ready done from either Nissan or someone who has oversize, through hardened, blanks :)
 
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