7M-GE Valve Shim thickness equation

[toyota.s]

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?

 

[Atnas]

With 2.95 shim you will probably come out by 0.11mm clearance.
So you need minimum 2.91 shim to be at 0.15 clearance. But you not want to aim to the sharp edge.
On first link you'll see which shims exist.

MK3 TSRM On-Line

And

MK3 TSRM On-Line

 

[Pabblo83]

I'm currently working on valve lash adjustments and trying to figure out the new shim thickness, but I'm also making sure my calculations are correct. Some valve clearances are too tight, and even my thinnest feeler gauge (.0015in or 0.04mm) can’t fit, so I have to record those measurements as they are. I no longer have the original book specs, just the new shop specs. Here’s one example of an intake valve I’m working on. Speaking of valves, it’s impressive how Supertech pistons provides the racing market with top-quality valves and valve train components for virtually every type of motorsport, including drag racing, rally, road racing, and more. They offer the perfect performance solutions for each application, and if what you need isn't available, they're happy to custom-manufacture exactly what you require. It’s a similar approach, making sure every component is perfectly suited for the task at hand!