trucker40 said: (quoted from post at 08:35:06 01/18/10) If a timing belt breaks,then you put it on and it wont start,bumping it to TDC wont work.You have to find out which mark on the crank and which mark on the cam..You could still be half way off,or 180 degrees.
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!!!!! NO !!!!!!
When an engine is TOGETHER an PROPERLY timed crank--to--cam THEN TDC happens "twice" ---once on no1 fireing stroke and 360* around from that which is ONE turn of the crank
WHEN YOU HAVE THE CAM BELT OFF and you properly line up the cam mark and the crank mark IT IS IN TIME. The only possible way that it can be off so far is cam timing is on a vehicle on which the dampener rubber allows the timing mark to "slip" on the dampener
On this particular engine the only other snafu is the third drive which is the distributor, but you can CHANGE that.
You might be interested to know that many older V8's----Chivvy's and Chryslers----when you correctly line up the cam drive marks---mark--to--mark, the engine is NOT on the no1 firing stroke but rather so called "180 out" which means that IF you install a cam drive and then install the distributor without rotating the engine ONE turn, you put the distributor in pointing to no6 with the timing marks lined up.
THIS IS WHY I always tell people to use the "blow your finger out" routine, because then you KNOW that no1 is "up." Alternately, if you have the valve cover off, you can eyeball the no1 valves "both closed"
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