IMRC Deletes

IMRC Deletes

Two options exist for OEM-type IMRC delete plates. The OEM plates can be modified to serve as deletes (aluminum plates shown) or Ford Motorsport composite delete plates may be used. At the present, only Paul's High Performance is known to have any inventory of the Ford Motorsport IMRC deletes ($245 per kit). According to the Ford dealer parts locator system, the set shown was the last set available through dealerships. After receiving them, the decision was made to use a set of 'Home-Brewed' IMRC deletes to follow the Do-It-Yourself theme of the project. After disassembling the OEM plates and cleaning up/gasket matching the ports, epoxy was used to fill in the required holes. The whole process took about 2 hours.

Tips On Converting Stock IMRC Plate Assemblies To IMRC Deletes

1. Release the return spring from its retaining tab to release tension on the return spring.

2. Remove all of the secondary port plates (2 screws per plate), the cable bracket from each IMRC plate and the spring steel gizmo in each rectangular recess (i.e. from each of the 3 epoxy filled recesses shown in the pic above).

3. Pull the plate rod out of its bore.

4. Clean the plates thoroughtly.

5. While holding a particular gasket in place, use a permanent marker to mark the material of the IMRC plate that is to be removed. This should be done for the intake-to-IMRC plate gasket and for the IMRC plate-to-head gasket.

6. Using a die grinding bit (aluminum-type bit), remove the required material designated by the marker ink. Make sure to provide a smooth (tapered) transition from the edge of the bore toward the inside of the bore. Also, for the OEM aluminum plates, remove the ridges within the bore at the transition between the cast surface and the machined surface of the secondary (round) bore. Use sanding rolls to put a finishing contour/texture on each bore.

7. Clean the plates thoroughly.

8. Use duct tape to cover the rectangular recesses and each gasket alignment hole. Each plate rod bearing recess and each rectanglular recess between pairs of port passages defines a cavity that need to be filled. Use duct tape to cover a bottom hole (with respect to the plate being positioned vertically). When done, all of the cavities will be able to be filled with epoxy at the same time (i.e. with the IMRC plate positioend in a vertical orientation). Filling the passage between mating primary and secondary bores is not necessary.

9. With each plate held in a vertical orientation, use a syringe to inject a mixed two-part (liquid) epoxy into each cavity to be filled. Fill the cavities very slowly to prevent entrapped air within the epoxy.

10. After the epoxy cures, remove the duct tape and use a sanding roll to remove any excess epoxy. Use a razor blade or utility knife to remove any cured epoxy from the gasket mating surfaces.

11. Drill out the epoxy in each gasket alignment hole. Start with a small drill and work up to a final drill size of 15/64". Each gasket alignment hole only needs to be drilled to a depth of about 3/8".

12. Clean the plates thoroughly.

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