Silent Posted April 27, 2006 Share Posted April 27, 2006 pokin through the "how to modify your datsun" book last night while watchin cartoons {yes i still watch cartoons} the plug, right above the timing tensioner. why is this sucker plugged? same on the back side of the motor? why? more oil pressure? more pressure to the head? im at a loss here. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted April 27, 2006 Share Posted April 27, 2006 That is the main oil galley. It needs to be plugged at the ends because you don't need oil coming out the front and back of the block, you want it to build pressure and come out through the crankshaft bearings and go up to the cam. Quote Link to comment Share on other sites More sharing options...
Nismo280zEd Posted April 27, 2006 Share Posted April 27, 2006 ask and you shall recieve. Quote Link to comment Share on other sites More sharing options...
Silent Posted April 27, 2006 Author Share Posted April 27, 2006 ask and you shall recieve. tiz true mine aren't plugged, i don't think i'll check em tonight Quote Link to comment Share on other sites More sharing options...
Jason Jarvis Posted April 28, 2006 Share Posted April 28, 2006 No plugs = no oil pressure = bad day.... Quote Link to comment Share on other sites More sharing options...
TimZ Posted April 28, 2006 Share Posted April 28, 2006 No plugs = no oil pressure = bad day.... This was most likely part of the block machining process - the oil galley was created by boring a long hole through the block in a precise location. In order for it to work, the ends of the galley have to be plugged, else the oil would just bleed out either end, as others have stated. The plugs also allow you to clean out the galley during a rebuild. You can't leave them out, though. Quote Link to comment Share on other sites More sharing options...
JMortensen Posted April 28, 2006 Share Posted April 28, 2006 This was most likely part of the block machining process - the oil galley was created by boring a long hole through the block in a precise location. In order for it to work' date=' the ends of the galley have to be plugged, else the oil would just bleed out either end, as others have stated. The plugs also allow you to clean out the galley during a rebuild. You can't leave them out, though.[/quote'] Yeah, probably should have mentioned that. You can get ones that you just hammer in, or you can tap the hole in the block and use 3/8" pipe plugs. You have to be careful though, because the galley that pressurizes the tensioner is right inside the front of the block, so if you put the pipe plug in too deep you can block it off. Don't want to do that!!! Quote Link to comment Share on other sites More sharing options...
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