Re: Chrysler 75 Hp Help With Dissassembly
RCH, Huh? You do realize that an RCH is a very small measurement, don't you?
Sometimes the two halves stick together from both the sealant and varnish deposits and sometimes the lower bearing and seal are tight in the crankcase. When you pop the top, the bottom cocks on the bearing and sticks a little. also, if the bottom piston is at or close to bottom dead center, or top, the crankcase half can bind on the crank cheeks. You need to use a little "psychology" on it. Couple of swear words also help--things like, it's making love and it's parents were never married. Only use a lot less words--you know them.
However, before you stick a prybar or large screwdriver in the lower pry point, please double check: There are six 1/4 bolts holding each cylinder flange and there are two additional 1/4 fillister head screws just below the two lower 3/8 x (9/16 head) bearing bolts. These screws seem to have no use but they actually put clamping force on the bottom crankshaft seal if the engine has a separate one, and they tend to be very difficult to remove without an impact screwdriver. Some engines have the seal separate and others have a bearing/seal combo. Factory just never eliminated the screws. Obviously, if you can separate the top, you have removed the alternator carrier/crankshaft seal and the two 1/4 inch bolts that go in the flange from the back because there is no room in the front of the flange
Of course, the two halves are held together at the bearings with one 3/8 stud and nut and one 3/8 bolt at the top. four 3/8 bolts bracket the top and bottom of the center cylinder, and two shorter 3/8 bolts secure the bottom bearing.
If the red spaghetti seal is broken when you remove it, you can substitute small grey screen splining--seals quite nicely, thank you, and seems to be resistant to oil as well. Cheap at the local home store.
When you reassemble, use a bead of RTV silicone--any color--or Locktite anaerobic sealer. I use the RTV when I have some on hand but I prefer the Loctite. Run a small blob at the point where the seals contact the upper and lower bearings. Run a thin bead inside and outside the spaghetti seals and around each 3/8 bearing bolt hole. Not too much or you will squeeze a lot into the crankcases.
