Mike Hage Posted January 31 Share Posted January 31 Hello Just wondering how this was sealed up for dust when it was new. The 2 ta s on the elbow dont allow me to put a gasket or ring on the lid very well. Curious to see what others have done... Link to comment Share on other sites More sharing options...
15sd Posted February 4 Share Posted February 4 The cap also provides crankcase ventilation ( as you may know ) and this design on your SF? may be an improvement to give more ventilation than was provided on the SD design. ( photo of mine attached ) The vent holes were quite small on the old design and may have clogged up easily on the dusty roads back in the day. However, anything that would filter out dust would inhibit air flow. For larger debris there should be a mesh strainer inserted in the filler pipe. ( SD Part no. 20188 ) Link to comment Share on other sites More sharing options...
Mike Hage Posted February 8 Author Share Posted February 8 Ah yes I completely forgot about that. So where does the air go out? Link to comment Share on other sites More sharing options...
15sd Posted February 8 Share Posted February 8 Through the small holes in my cap and through the larger v-shaped gaps in the underside of your cap ( looks like an inverted Jughead's hat ). If the crankcase is pressurized by blow-by past the piston rings, the oil gets contaminated by the products of combustion and can also push oil out the rear main bearing seal. Link to comment Share on other sites More sharing options...
15sd Posted February 8 Share Posted February 8 I should have written SF part number 20188 "Oil Filler Strainer ". My SD uses the smaller strainer, the same one as the SC and SA models. Link to comment Share on other sites More sharing options...
Mike Hage Posted February 9 Author Share Posted February 9 Its just a mesh or horsehair ring around the lid then. Could maybe just make something... Link to comment Share on other sites More sharing options...
Mike Hage Posted February 9 Author Share Posted February 9 Or it goes into the filler tube itself? Link to comment Share on other sites More sharing options...
15sd Posted February 9 Share Posted February 9 (edited) Mine goes into the filler tube. It's the original one in brass mesh. I've used a stainless steel kitchen strainer to make one for the radiator neck ( which was missing ). Mine is cup-shaped so flat on the bottom and simply crimp and bend up the sides for a tight fit in the filler tube. Parts book photo of yours looks the same. You could make a nicer job soldering and brazing it into a cup shape but carefully folding up the sides will work. Restoration Supply sells various "brass screen" . # 100 is for fuel filters so perhaps # 80 or # 50 for oil. You could always remove it when you pour in the oil if it's too fine but you might need to check it once in while to make sure it isn't clogged with dust. Edited February 9 by 15sd change (see edit history) Link to comment Share on other sites More sharing options...
Mike Hage Posted February 10 Author Share Posted February 10 Cool I can build that thank you! Im looking for some brass mesh for the oil pickup in the pan too. My oil filler has a brass mesh right where the filler gasket is bolted to the crank case as well. Link to comment Share on other sites More sharing options...
Mike Hage Posted February 13 Author Share Posted February 13 I found these at the Lethbridge swap meet yesterday. They were in a free box too!! Cut them lengthwise and make a little basket? Fold the sides over double, solder Link to comment Share on other sites More sharing options...
15sd Posted February 13 Share Posted February 13 Definitely all you'll need. Link to comment Share on other sites More sharing options...
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