D21 Hardbody 4WD V6-2960cc 3.0L SOHC MFI (VG30E) (1991)
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Comments regarding R-134a manifold gauge set:
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Be certain that the gauge face indicates R134a or 134a.
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Be certain that the manifold gauge set has the 1/2" - 16 ACME threaded connections for service hoses, ensuring that only R-134a service hoses are
used.
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Be certain that no refrigerants other than R-134a (along with only specified lubricants) are used with the manifold gauge set.