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After all gasket mating surfaces have been carefully cleaned, place a straight edge across the cylinder head and engine block gasket surfaces. Flatness should not vary more than .0025˝. If a variance of more than .0025˝ is measured, we recommend correcting this situation before installing the head gasket.

Re-tap and thoroughly clean all head bolt/stud threaded holes. If existing bolts or studs are being reused, clean threads and lightly lubricate to insure accurate torque readings.

NOTE: Torque specs will vary with the type of lubricant used.

  • Use fresh 10W-30 weight motor oil and follow bolt/stud manufacturer’s recommendation.
  • Use a thread sealer or silicone on bolt holes that enter into cooling passages.
  • Do not use any type of adhesive or sealer on Mr. Gasket/Ultra-Seal® head gaskets. The special coatings used on the gaskets are more than adequate to properly seal all fluid passages and minor surface imperfections.

Applying proper clamp load is one of the most important steps to a successful seal. After installing head gasket and cylinder head, tighten bolts/studs following engine manufacturer’s recommended torque sequence. Tighten in at least three equal steps moving the torque wrench in a smooth, even pull, which will yield the most accurate torque readings. The use of Mr. Gasket hardened washers will further reduce friction and increase torque accuracy.