Quote:
Originally Posted by Marrk
This s a longstanding mystery, Bald. It's hard to believe that a volume manufacturer, like Toyota or GM, is bench testing and bench-breaking-in each and every one of the hundreds of thousands of engines that it produces each year. Maybe M-B or Porsche do it on some of their models. On the other hand, I suppose they could fire each engine up for a few seconds, once it reaches the end of the production line, just to look for major leaks, etc.
I do not know. This is akin to that other great mystery, i.e., Is there such a thing as break-in oil from the factory?
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Hey Marrk,
You maybe surprised to know that at one Toyota facility they used to test fire (break in) every AZ engine.
Most GR's currently being manufactured are dry fired, meaning they are fully lubricated and revved to redline but without fuel. This is the end of the line production check. But this is hardly the first time they check for quality issues along the production line.
When an audit engine is brought into the performance testing room and put tested on a dyno it is first brought up to temperature. Then the factory worker continues with the performance test. Loading it at different RPM's and recording key performance indicators. The total test takes about 2-3 hours. It is then completely disassembled and inspected for quality issues. Then reassembled and shipped off.
I have never heard of break-in oil.
More relevant information:
After rebuilding any 13B's, 2JZ, or VQs we would burp the coolant and listen and visually inspect during start up. Then it went onto the dyno for tuning. Hopefully hitting 500,600, and 700 whp. Without break in.