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Timing Problem
Okay while replacing a piston that i had burned while wheeling in my 72 Datsun pickup I accidently spun the crankshaft seperately from the cam shaft. What is the easiest way to reset the timing on the motor and then realign the distributor?
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well your best bet would be fist find out your firing order, then the degrees at which each piston is to hit top dead center, or the point at which the sparkplug fires and the fuel air mixture is ignited. the problem i'm gathering here is you're either having a misfire due to the new piston not being setup properly with the crank and things are prolly off by just a bit. what you should do is get a friend and remove the valve covers.(unhook the distributor plugs as well...we don't need combustion, just a little turning) then have your friend go in and just slightly crank the engine and you keep an eye on that misfiring piston and it's valves. then wait til you hear that knock of the side of the cam hitting the valve's closed prematurely.
now there's a special tool you use in this situation it looks like a pocket knife and has many little metal strips each of differing thicknesses. your job here is to figure out the proper thickness from the cam and the valve. the distance at which things run at optimum efficiency and at which this cylinder's valve should be. and place one of the metal strips in place (one that's thinner than the actual width) and pull it out after you get the knock. then do it again with a thicker one, and again with thicker ones until you reach the thickness required. this will have adjusted your engine's timing to the proper spot but you still need to adjust the distributor cap.
figure out what your cap should be set at (if you have a repair manual for your truck it should tell you in there) and figure out how it should be turned, clockwise or counter. then turn it to the proper position, line up the coils onto the distributor in the proper spots and begin cranking it, once you have it lined up right to your engine's proper firing order the distribution problem should be solved. as for the timing the knock method i just told you of works great on overhead cam engines, and i know that old datsun engine is OHC, so you should be fine. if not lemme know and i'll try and help out.
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I have no clue about this, but my husband would. BUT! I can direct you to a few sites that there are a few people who might can help you!
www.superstallions.com is a Mustang site...but the guys on there know a lot about cars and accept members who are only future mustang owners or who just like them and would like to participate in message boards.
www.automotiveforums.com has a lot of different car and truck owners who work on their own cars and could probably tell you what you need to do!
autoforums.carjunky.com is actually an auto REPAIR forum! Try them, they're great!
Sorry I couldn't directly answer your question, but at least I could send you in the right direction!
Good luck!
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