neale Posted August 8, 2007 Report Share Posted August 8, 2007 Hello All, I was busy setting up the static timing on my 1960 TR3A engine a few evenings ago. The engine is rebuilt but not run yet. The timing mark on the crank pulley does not line up with the pointer on the timing chain cover when number 1 piston is at TDC. It appears to be about '20 minutes' out of sync ? How can this be? The pulley is correctly fitted over the key way on the crank. The crank is a replacement / reground item. Could it be the pulley is from an earlier car? or that the new crank does not match the exsisting pulley? Any answers much appreciated. /neale. Quote Link to post Share on other sites
Les Posted August 8, 2007 Report Share Posted August 8, 2007 (edited) Hi Neale The pulley is bolted to the central part with the keyway by six bolts. Yours must have been assembled two bolts out of the correct position. I have just looked at a spare pulley assembly I have and the timing hole is directly opposite ( 180 degrees ) from the keyway. Also looked at a spare crankshaft and the keyway is directly opposite ( 180 degrees ) from the number one big-end journal. Hope this helps Les Edited August 8, 2007 by Les Quote Link to post Share on other sites
TR 2100 Posted August 9, 2007 Report Share Posted August 9, 2007 (edited) It appears to be about '20 minutes' out of sync ? How can this be? "20 minutes" is one third of 1° (I think). Or do you mean 20° ? AlanR Edited August 9, 2007 by TR 2100 Quote Link to post Share on other sites
RogerH Posted August 9, 2007 Report Share Posted August 9, 2007 Hi Folks, am I right in thinking that the crankshaft pulley is made in two parts and can be fitted incorrectly. 20 minutes = 1/3 degree, not much is it. Roger Quote Link to post Share on other sites
neale Posted August 9, 2007 Author Report Share Posted August 9, 2007 thanks for the help with my timing mark enquiry.... I was starting to jump to some strange conclusions. /neale. Hi Neale The pulley is bolted to the central part with the keyway by six bolts. Yours must have been assembled two bolts out of the correct position. I have just looked at a spare pulley assembly I have and the timing hole is directly opposite ( 180 degrees ) from the keyway. Also looked at a spare crankshaft and the keyway is directly opposite ( 180 degrees ) from the number one big-end journal. Hope this helps Les Quote Link to post Share on other sites
Les Posted August 9, 2007 Report Share Posted August 9, 2007 I have assumed that Neale means that the timing hole is 20 minutes out as if looking at the face of an analogue clock, for those of us that remember them. Six bolts so the difference between each bolt would be 10 minutes, or is this lateral thinking? Les Quote Link to post Share on other sites
jonlar Posted August 9, 2007 Report Share Posted August 9, 2007 That's how I'd read it as well Les. Quote Link to post Share on other sites
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