Micrometer (to measure shims)

javaman · Post by **javaman** » Mon Aug 21, 2006 1:16 pm

Which type should I get ? Saw some cheap ones in Bunnings which is digital and have a resolution of 0.1mm. Is this 'precise' enough?

If not, what brand should I get (and from where) ?

Stace · Post by **Stace** » Mon Aug 21, 2006 1:35 pm

Mic's sould at least measure 0.01mm. A 0-25mm Mic will be all you'll need for shim's. Really the only way to go as far as brands is Mititoyo. Try and stay away from digital ones, I have found them to be not as accurate as the normal veriety and see, to be a bit gimicky to me.

Smitty · Post by **Smitty** » Mon Aug 21, 2006 1:42 pm

Stace wrote:Mic's sould at least measure 0.01mm. A 0-25mm Mic will be all you'll need for shim's. Really the only way to go as far as brands is Mititoyo. Try and stay away from digital ones, I have found them to be not as accurate as the normal veriety and see, to be a bit gimicky to me.

I am with Stace

all my measuring gear (caliper dial gauges etc ) are Mititoyo
...which are not cheap btw
and
measuring shims????
all the shims I have ever seen have their thickness screen printed
on 'em ...so no need for micrometers

BladeBoy · Post by **BladeBoy** » Mon Aug 21, 2006 2:23 pm

Smitty wrote:
Stace wrote:Mic's sould at least measure 0.01mm. A 0-25mm Mic will be all you'll need for shim's. Really the only way to go as far as brands is Mititoyo. Try and stay away from digital ones, I have found them to be not as accurate as the normal veriety and see, to be a bit gimicky to me.
I am with Stace

all my measuring gear (caliper dial gauges etc ) are Mititoyo
...which are not cheap btw
and
measuring shims????
all the shims I have ever seen have their thickness screen printed
on 'em ...so no need for micrometers

Thats what I thought..

javaman · Post by **javaman** » Mon Aug 21, 2006 2:27 pm

Hey that's genius !!! So you think they don't change in thickness (due to wear) ?

Stace · Post by **Stace** » Mon Aug 21, 2006 2:29 pm

javaman wrote:Hey that's genius !!! So you think they don't change in thickness (due to wear) ?

Come back of the year to Andi LMAO

Duane · Post by **Duane** » Mon Aug 21, 2006 2:37 pm

Isnt it generally the distance between the shim and the valve clearence, rather than the shim that changes? hence you measure the distance between the two at a certain point - and find the correct shim for it ?

Stace · Post by **Stace** » Mon Aug 21, 2006 2:37 pm

Duane wrote:Isnt it generally the distance between the shim and the valve clearence, rather than the shim that changes? hence you measure the distance between the two at a certain point - and find the correct shim for it ?

Yes, However shims will wear over time

Duane · Post by **Duane** » Mon Aug 21, 2006 2:40 pm

Stace wrote:
Duane wrote:Isnt it generally the distance between the shim and the valve clearence, rather than the shim that changes? hence you measure the distance between the two at a certain point - and find the correct shim for it ?
Yes, However shims will wear over time

Shimmy shimmy!!!

javaman · Post by **javaman** » Mon Aug 21, 2006 2:48 pm

Damn!! I need a micrometer then

Smitty · Post by **Smitty** » Mon Aug 21, 2006 3:12 pm

no...
if you think the shim is worn....
buy new ones

Duane · Post by **Duane** » Mon Aug 21, 2006 3:15 pm

But you still have to measure the distance of the valve clearence no? to decide what shim to buy, hence you still need the tool.

javaman · Post by **javaman** » Mon Aug 21, 2006 3:31 pm

From reading, the process of shims replacement is not as simple as buying a new size shim. As the thickness of the shim will be based on overall condition (determined using a feeler gauge while still installed). Obtaining this number we can get the desired gap if the true thickness of current shim is known

Rossi · Post by **Rossi** » Mon Aug 21, 2006 3:53 pm

Stop trying to make it more technical than it needs to be.
Shim size printed on 'em is all I've ever gone by as I ain't trying to blueprint the engine

Smitty · Post by **Smitty** » Mon Aug 21, 2006 4:12 pm

Rossi wrote:Stop trying to make it more technical than it needs to be.
Shim size printed on 'em is all I've ever gone by as I ain't trying to blueprint the engine

rossi ....sez its perfectly.....