Patent ID: 8028675

Claim:
A method for installation of a flame cone of a pre-ignition system for ignition of a combustible fuel/gas mixture within a combustion chamber of an internal combustion engine, the flame cone having an inboard end and an outboard end, a longitudinal centerline, and at least one exit port rotationally oriented about said longitudinal centerline, comprising the steps of: a. providing a physically structural rotational position indicator on the inboard end of the flame cone, said rotational position indicator mimicking the rotational position of the at least one exit port about the longitudinal centerline of the flame cone, b. providing a tool which is uniquely adapted to engage said rotational position indicator for threading said flame cone into said throughbore, said tool including a visible marker which is aligned with said rotational position indicator on said flame cone, whereby noted rotational movements of said tool are indicative of the rotational position of said flame cone, hence the rotational position of said at least one exit port; c. inserting the flame cone and its initially applied washer to a first depth into the throughbore, d. providing a 12 O'clock point of reference on said cylinder head proximate said throughbore and which is visible from a location external of the internal engine, e. from a location external of the head of the internal combustion engine and employing said tool, inserting said flame cone into said throughbore to a predetermined depth of sealingly engagement between the flame cone and the throughbore; f. thereupon, noting the rotational orientation of said marker on said tool relative to the 12 O'clock marker on said head; g. providing a plurality of flat spacer washers of differing individual thicknesses; h. providing a lookup table which identifies the thickness of a space washer which, when applied to that end of said flame cone which is inserted into the throughbore, will adjust the depth of insertion of the flame cone into the throughbore by an amount which will cause said marker on said tool to be relocated closer to alignment of said rotational position marker on said tool, with the 12 O'clock marker on said head; i. for any noted degree of misalignment of said marker on said tool from said 12 O'clock marker, employing said lookup table, selecting a spacer washer appropriate for adjusting the depth of insertion of the flame cone into said throughbore to cause said marker on said tool to move toward alignment with the 12 O'clock marker on said head; j. mounting said selected washer on that end of said flame cone which is insertable into said throughbore; k. employing said tool, reinserting said flame cone and said selected washer into said throughbore to a depth of sealing engagement between the flame cone and the throughbore; l. repeating steps (e) through (k).