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3886 Posts in 1208 Topics- by 2247 Members - Latest Member: Steve Ahmann

May 23, 2012, 02:18:11 AM
Maintenance IssuesSpitfire - GT6Determining TDC on "75" 1500
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Jakeporter
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« on: August 18, 2011, 01:48:29 PM »
Looking for a sanity check.... How exactly do I determione TDC on the compression stroke? Was told that the two rearmost valves should be moving when the timing mark on the crank pully is at 0 deg's and the #1 piston is at the top of its travel. Just looking to confirm this to be true
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herald948
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« Reply #1 on: August 19, 2011, 01:10:29 PM »
That should do it!
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Andrew (Andy) Mace, lifelong Triumph owner! Smiley Please check out the North American Triumph Sports 6 and Herald Database site at http://triumph-herald.us
bobhustead
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« Reply #2 on: August 24, 2011, 07:43:17 PM »
An easier to follow approach is to watch #1 valves, watch exhaust open and close and then intake open and close. Closure of intake is the commencement of the compression stroke. Then look at the crank pulley. When the dot and indicator next correspond, you are at TDC of compression stroke on #1.
Bob Hustead
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bobhustead
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