 I'm down to the last few details of finishing the 188 diesel installation in my 530CK. The o-rings and seals that came with my rebuild gasket kit don't match up exactly with what was originally on the engine. I've attached a picture with each of the o-rings/seals laid out and I'm hoping someone out there can help me identify them. Starting at the bottom: Row 1 has (4) 3/8" ID x 9/16" OD nylon rings. Row 2 has (4) 5/16" ID x 3/8" OD nylon rings. Row 3 has (3) 3/4" OD washers with rubber inserts. Row 4 has (2) 3/4" ID x 1" OD o-rings and (1) 3/4" ID x 1" OD copper washer. Row 5 has (3) 3/8" ID x 9/16" OD o-rings Row 6 has (1) 1-1/16" ID x 1-1/4" OD o-ring and (2) 7/8" ID x 1-1/8" OD copper crush washers. The plastic bag on the bottom left has (8) 9/32" ID x 3/8" OD flat rubber rings. The plastic bag on the top left has (8) 3/8" ID x 1/2" OD steel rings. I think these are the sealing washers where the copper injection lines fasten to the injection pump. Also included in the gasket rebuilt set were (4) 3/16" ID flat rubber rings that matched what was used in the injector return line fittings at the injectors. There were also (4) 5/16" ID flat rubber rings that matched what was used in the rest of the injector return line fittings from the pump to the fuel tank. I have a hunch that the (4) large nylon rings are for use at the injector feed tubes. However the original fittings used rubber seals. The nylon washers appear to be a little thinner. I haven't tried them as yet. Figured I'd ask for help! Needless to say any help here sorting this out would be greatly appreciated! Brad
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