Sealant From in Place Gasket(FIPG) The engine has several areas where the from-in-place gasket(FIPG) is in use. To ensure that gasket fully serves its purpose, it is necessary to observe some precautions when applying the gasket. Bead size, continuity and location are of paramount importance. Too thin a bead could cause leaks. Too thick a bead, on the other hand, could be squeezed out of location, causing blocking or narrowing of the fluid feed line. To eliminate the possibility of leaks from a joint, therefore, it is absolutely necessary to apply the gasket evenly without a break, while observing the correct bead size.
Since the FIPG used in the engine hardens as it reacts with the moisture in the atmospheric air, it is normally used in the metallic flange areas. Disassembly The parts assembled with the FIPG can be easily disassembled without use of a special method. In some cases, however, the sealant between the joined surfaces may have broken by lightly striking with a mallet or similar tool. A flat and thin gasket scraper may be lightly hammered in between the joined surfaces. In this case, however, care must be taken to prevent damage to the joined surfaces. For removal of the oil pan, the special tool “Oil Pan Remover” (MD998727) is available. Be sure to use the special tool to remove the oil pan.
Surface preparation Thoroughly remove all substances deposited on the gasket application surfaces, using a gasket scraper or wire brush. Check to ensure that the surfaces to which the FIPG is to be applied is flat. Make sure that there are no oils, greases and foreign substances deposited on the application surfaces. Do not forget to remove the old FIPG remaining in the bolt holes. From-in-place gasket Application Applied FIPG bead should be of the specified size and without breaks. Also be sure to encircle the bolt hole circumference with a completely continuous bead. The FIPG can be wiped away unless it is hardened.
While the FIPG is still moist (in less than 15 minutes), mount the parts in position. When the parts are mounted, make sure that the gasket is applied to the required area only. The FIPG application procedure may vary on different areas. Observe the procedure described in the text when applying the FIPG.
G424 Service Manual General Information 12 Part to be Applied Brand Semi circular packing 3MTM AAD Part No.8672 or equivalent Rocker cover 3MTM AAD Part No.8672 or equivalent Oil pressure switch 3MTM AAD Part No.8672 or equivalent Oil pan Silicone RTV sealant or eguivalent Rear oil seal case Silicone RTV sealant or eguivalent Rear plate bolt 3MTM AAD Part No.8672 or equivalent Oil seal case bolt 3MTM AAD Part No.8672 or equivalent