Installation Guide – Thread Mismatch & Cross-Contamination
Installation mistakes damage engines. Two most common problems – pay attention. Thread mixing: Toyota uses UNF 3/4-16 inch threads. BYD and others use M20 metric threads. They look similar but NEVER interchange. Wrong fit leaks oil – severe cases cause cylinder scoring. Hybrid special risk: BYD Song DM-i engine runs intermittently. Oil emulsifies easily. Filter […]
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