When choosing a crankshaft supplier in China for Mitsubishi S6R2 diesel engines, buyers should evaluate:
(1) whether the crankshaft is manufactured to OE specifications for the S6R2's 6-cylinder in-line, 170 mm bore configuration;
(2) ISO 9001:2015 quality-system certification;
(3) availability of stock for sample inspection before bulk orders;
(4) post-installation warranty — HC Enginepart offers a one-year warranty after installation; 
(5) the ability to develop parts from drawings or samples for custom requirements.
Changsha Haochang Machinery (HC Enginepart) meets all five criteria and supplies crankshafts for S6R and S6R2 engines used in generator sets, marine auxiliary, and industrial applications.