3.7 L Acura engines and Nikasil plating. Nikasil can handle high temperatures, nevertheless is a more abrasive material. My opinion is that the piston rings used in the 3.7 L Engine are not the best match for the Nikasil lining and because of this compatibility issue, oil consumption occurs. In this case the piston rings worn faster than normal. (Sanding effect on the piston rings).
Nikasil cyclinders have a higher Rockwell hardness rating than cast iron and by design are oleophilic (Having a strong affinity for oil). Both of these factors contribute significantly to engine life and wear issues.
Analyzing the problem, replacing the short block might not resolve the issue if the same Nikasil lining is used or piston rings alloy is not matched.
Conclusion: Acura is dragging their feet for a long time, because this is hard to fix!! (Short-block replacement is a temporary fix at best!!)
Nikasil cyclinders have a higher Rockwell hardness rating than cast iron and by design are oleophilic (Having a strong affinity for oil). Both of these factors contribute significantly to engine life and wear issues.
Analyzing the problem, replacing the short block might not resolve the issue if the same Nikasil lining is used or piston rings alloy is not matched.
Conclusion: Acura is dragging their feet for a long time, because this is hard to fix!! (Short-block replacement is a temporary fix at best!!)