# Micrometer Selection **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [February 11, 2012, 9:14pm UTC](https://community.cartalk.com/t/micrometer-selection/70892 "2012-02-11T21:14:01Z")\ **Posts on this page:** 8\ **Page:** 3
**Author:** ![mystic](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@mystic](https://community.cartalk.com/u/mystic)\ **Post date:** [February 13, 2012, 8:49pm UTC](https://community.cartalk.com/t/micrometer-selection/70892/41 "2012-02-13T20:49:43Z")
“If I remember correctly Caddyman, the tight valve may have been referred to another post and involved an intake instead of an exhaust valve.” [http://community.cartalk.com/discussion/2282671/whats-the-deal-with-this-engine#Item\_86](http://community.cartalk.com/discussion/2282671/whats-the-deal-with-this-engine#Item_86) ---
**Author:** ![mystic](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@mystic](https://community.cartalk.com/u/mystic)\ **Post date:** [February 13, 2012, 9:01pm UTC](https://community.cartalk.com/t/micrometer-selection/70892/42 "2012-02-13T21:01:18Z")
“This seemed to be more of a hobbyist kind of thing, checking stuff out of curiosity,” BINGO! And also to try and make the engine last as long as possible. But still considered part of the hobby. ---
**Author:** ![littlemouse](https://avatars.discourse-cdn.com/v4/letter/l/c4cdca/32.png) [@littlemouse](https://community.cartalk.com/u/littlemouse)\ **Post date:** [February 14, 2012, 3:43pm UTC](https://community.cartalk.com/t/micrometer-selection/70892/43 "2012-02-14T15:43:04Z")
“Cars do not wear out one part at a time, ESPECIALLY engines…” Bogus. ---
**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\ **Post date:** [February 14, 2012, 10:44pm UTC](https://community.cartalk.com/t/micrometer-selection/70892/44 "2012-02-14T22:44:10Z")
I don’t post “Bogus”…When I make a mistake, I correct it or accept correction offered by others… ---
**Author:** ![mystic](https://avatars.discourse-cdn.com/v4/letter/m/71e660/32.png) [@mystic](https://community.cartalk.com/u/mystic)\ **Post date:** [February 14, 2012, 11:08pm UTC](https://community.cartalk.com/t/micrometer-selection/70892/45 "2012-02-14T23:08:26Z")
This thread reminded me of this video ---
**Author:** ![keith](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/keith/32/5518_2.png) [@keith](https://community.cartalk.com/u/keith)\ **Post date:** [February 14, 2012, 11:26pm UTC](https://community.cartalk.com/t/micrometer-selection/70892/46 "2012-02-14T23:26:36Z")
Cars do NOT wear out one part at a time, however, cars will have typically have one part at a time wear beyond their limits. For example, look at your brakes. The pads may all wear at relatively the same rate, but one pad will be the first to exceed the wear limits first. Of course you don’t replace them one at a time as each reaches its wear limit. ---
**Author:** ![Caddyman](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/caddyman/32/23_2.png) [@Caddyman](https://community.cartalk.com/u/Caddyman)\ **Post date:** [February 14, 2012, 11:40pm UTC](https://community.cartalk.com/t/micrometer-selection/70892/47 "2012-02-14T23:40:10Z")
When a car engine or transmission reach 200K-300K miles, ALL the moving parts are worn to some degree, some a little more than others…It’s a race to the finish-line to see which part FAILS first and disables the vehicle…Car makers do NOT design or build there stuff to last forever…They build it to last long enough and no more… ---
**Author:** ![the\_same\_mountainbike](https://avatars.discourse-cdn.com/v4/letter/t/c89c15/32.png) [@the\_same\_mountainbike](https://community.cartalk.com/u/the_same_mountainbike)\ **Post date:** [February 15, 2012, 12:53am UTC](https://community.cartalk.com/t/micrometer-selection/70892/48 "2012-02-15T00:53:42Z")
If you really want to know what the dimensions are, and you have the budget for it, this is where I’d go: [http://www.starrett.com/](http://www.starrett.com/), and you’d want to request the Certificate of Calibration with the tool. The stuff on your link won’t IMHO be sufficient if you’re rebuilding the motor, but if you’re using plastigage anyway for the bearing clearances you should be fine for specifically the parameters that you mentioned. It isnn;t like you’re going to be grinding the cam lobes yourself. If you were, you wouldn;t be asking the question. [Previous page](https://community.cartalk.com/t/micrometer-selection/70892.md?page=2)