There’s more than a couple things that seem like universal laws in the world. As carpenters like to say, “measure twice and cut once.” Engine builders would tell you that their version is “measure twice and assemble once.” In this video from MAHLE Motorsports we get an awesome rundown of the proper piston pre-assembly measurements that one should partake in before screwing a short block together.
These measurements include checking clearances between the crank and the pistons, the connecting rod side clearance, the relationship between the piston and the deck, the length of the cylinder liners, and more. None of it is hard to do per se but we know that sometimes these are steps that get skipped over due to time constraints and all.
After seeing this video you’ll not miss them again, we bet. Why? Well when you see someone do something like this, it registers. The next time you are making parts come together as one unit, you’ll think twice about ailing on the relatively unsexy world of measurements and feeler gauges. Hey, your engine will thank you and its performance will be your reward. Is there anything worse than having to do stuff twice because you blasted through the work before you realized that the crank counterweights were running into the bottoms of the pistons? No good!