7M-GE Valve Shim thickness equation

toyota.s

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Nov 2, 2022
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So I'm doing valve lash and trying to figure out new shim thickness. Also too see if I'm doing the equation right. Some valve clearance are too tight, so even my thinnest feeler gauge .0015in (0.04mm) doesn't even go through, so I end up writing those numbers down as the measurement. I no longer have book specs, new shop specs. I'll give you 1 intake example.

New valve clearance specs .006-.10in (.152-.254mm)
Measured clearance .0015in (0.04mm)
Original shim thickness 0.119in (3.02mm)

Measured clearance + original shim thickness=
Then subtract the difference=new shim thickness

I'll use mm because when you buy new ones they measure in mm.

0.04mm+3.02mm=3.06
difference .254mm-.152mm=0.102mm
3.06-0.102=2.95

2.95 is my new shim thickness.

Anybody know if I correct?