The 15 second cranking test was reasonable when most people were driving around in 1.3L or 1.6L petrol cars. A 2L diesel engine requires a lot more cranking current due to the higher compression. The starter solenoid as well as the starter motor would be in danger of overheating over 15 seconds.
Personally, I would never crank an engine on one of my cars for more than 5 seconds, which will feel like eternity when doing it.
A local garage will do the equivalent high-current drop test for little more than beer money!
|