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Valve spring loaded height and test force (Mazdaspeed)

Pressing force IN: 38.72—43.78 lbf (172.60—195.15 N; 17.6—19.9 kgf) EX: 38.72—43.78 lbf (172.60—195.15 N; 17.6—19.9 kgf) Standard height IN: 1.56 in (39.5 mm) EX: 1.56 in (39.5 mm)Pressing force IN: 172.60—195.15 N {17.6—19.9 kgf, 38.72—43.78 lbf} EX: 172.60—195.15 N {17.6—19.9 kgf, 38.72—43.78 lbf} Standard height IN: 39.5 mm {1.56 in} EX: 39.5 mm {1.56 in}

Factory manualTaken from a Mazda factory workshop manual, with page citation.
Procedure

Apply the specified pressing force and measure spring height; this is a loaded measurement, not free length.

Applies to
  • NB 2004–2005 (BP-Z3-TURBO) — 2004 factory turbo-engine evidence; 2005 inferred within MSM family.
  • Verified in: 2004 Mazda Engine Workshop Manual BP (1.8L), normally aspirated and turbo

Sources (1)

View 1 source citations
  • 2004 Mazda Engine Workshop Manual BP (1.8L), normally aspirated and turboTier 1
    Page 01–10–20 (PDF p. 32) · Printed value & notes
    Part no. 9999-95-EWBP-04
    Page 01–10–20 (PDF p. 32)
    Printed: “Pressing force IN: 172.60—195.15 N {17.6—19.9 kgf, 38.72—43.78 lbf} EX: 172.60—195.15 N {17.6—19.9 kgf, 38.72—43.78 lbf} Standard height IN: 39.5 mm {1.56 in} EX: 39.5 mm {1.56 in}”

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