How to Measure Rod Journal Clearance | Engine Building 101
Proper rod bearing clearance is essential when building an engine.
While some aftermarket bearing manufacturers offer general rules of thumb as starting points for target bearing clearances, there is no one-size-fits-all number. Things like engine type/size, operating conditions, intended application, and lubricant selection can ultimately effect the ideal bearing clearance number.
For our Project LS high-horsepower engine, which will have forced induction, we were shooting for a .0027-inch or .0028-inch number. Once you've established your target clearance, you can determine your existing bearing clearance by measuring the rod journals with a micrometer and subtracting the numbers from measurements taken with a dial bore gauge on the installed bearings. For the greatest accuracy, the dial bore gauge should be "zeroed" on the inside of the micrometer before measuring the bearing to ensure the measurement is the exact difference between the two.
In this video we'll take you through the entire process, from measuring and recording the journal size and checking the final rod bearing clearance. Follow along...
Tools Used:
Micrometer: https://www.summitracing.com/search/part-type/micrometers
Dial Bore Gauge: https://www.summitracing.com/search/part-type/bore-gauges
Connecting Rod Vise: https://www.summitracing.com/search/part-type/connecting-rod-vises
Видео How to Measure Rod Journal Clearance | Engine Building 101 канала Summit Racing
While some aftermarket bearing manufacturers offer general rules of thumb as starting points for target bearing clearances, there is no one-size-fits-all number. Things like engine type/size, operating conditions, intended application, and lubricant selection can ultimately effect the ideal bearing clearance number.
For our Project LS high-horsepower engine, which will have forced induction, we were shooting for a .0027-inch or .0028-inch number. Once you've established your target clearance, you can determine your existing bearing clearance by measuring the rod journals with a micrometer and subtracting the numbers from measurements taken with a dial bore gauge on the installed bearings. For the greatest accuracy, the dial bore gauge should be "zeroed" on the inside of the micrometer before measuring the bearing to ensure the measurement is the exact difference between the two.
In this video we'll take you through the entire process, from measuring and recording the journal size and checking the final rod bearing clearance. Follow along...
Tools Used:
Micrometer: https://www.summitracing.com/search/part-type/micrometers
Dial Bore Gauge: https://www.summitracing.com/search/part-type/bore-gauges
Connecting Rod Vise: https://www.summitracing.com/search/part-type/connecting-rod-vises
Видео How to Measure Rod Journal Clearance | Engine Building 101 канала Summit Racing
Показать
Комментарии отсутствуют
Информация о видео
Другие видео канала
![How To Use Plastigage -EricTheCarGuy](https://i.ytimg.com/vi/q3pHb-qXZc8/default.jpg)
![Measuring Bearing Clearance (very easy) - Tech Tip Tuesday](https://i.ytimg.com/vi/sMldj8IexYU/default.jpg)
![Installing Pistons and Connecting Rod Assemblies (Engine Building 101)](https://i.ytimg.com/vi/pzjjB7EcuE0/default.jpg)
![Measuring cylinder bores using a dial bore gauge | DIY](https://i.ytimg.com/vi/VXiN1lNZ7TY/default.jpg)
![How to Read Micrometers](https://i.ytimg.com/vi/j0ARvWwMZX8/default.jpg)
![How to measure rod bearing oil clearance for ANY engine. Pontiac short block re-build, Part 3](https://i.ytimg.com/vi/q0-2ULbc7qw/default.jpg)
![Bearing Clearances Part 1](https://i.ytimg.com/vi/tKyC-yH40Xo/default.jpg)
![Grinding The Crankshaft Rod Journals - Spun Rod Bearing - '68 Firebird 350 Engine Rebuild - Pt 6](https://i.ytimg.com/vi/12UdcpXHxPM/default.jpg)
![How to Calculate and Measure Main Bearing Clearance -- Engine Building 101](https://i.ytimg.com/vi/WYx-de7cyxs/default.jpg)
![David Vizard's PowerTec 10 EP 12 Part 1 Checking Bearing Clearance. To Plastigage or Not.](https://i.ytimg.com/vi/Q85pE6Po-28/default.jpg)
![Rod Bolt Torque VS Stretch Test (Surprising Results!)](https://i.ytimg.com/vi/RSB-qc5Nk1g/default.jpg)
![Steve Tech Video - How to Set Bearing Clearance](https://i.ytimg.com/vi/zWo5cDxY0lo/default.jpg)
![Engine Building 101:Installing LS Cam Bearings](https://i.ytimg.com/vi/tqoZufK-iOI/default.jpg)
![What Makes an Engine Rod Knock Noise? | TSI TearDown](https://i.ytimg.com/vi/M-oseGpfoVI/default.jpg)
![Better Engine Building: Does Plastigauge Work? (Testing Against "Real" Engine Builder's Tools)](https://i.ytimg.com/vi/Mj0_Njqmoc0/default.jpg)
![Crankshaft Rod & Main Journal Measurement](https://i.ytimg.com/vi/HgUOnbOMj1k/default.jpg)
![Dial Bore Gauge and Cylinder Measurements](https://i.ytimg.com/vi/taYrCRERzIs/default.jpg)
![Summit Racing Engine Building 101: Piston Ring Installation](https://i.ytimg.com/vi/e9NBo-XC7AY/default.jpg)
![BEARING CLEARANCE - How to MEASURE and PREVENT engine damage](https://i.ytimg.com/vi/WEuedVJJgIA/default.jpg)
![GM Gen 3 vs Gen 4 LS Engines...What are the Differences?](https://i.ytimg.com/vi/1T5ruycaD4M/default.jpg)