jeepwm69 7,223 Posted March 4, 2020 Welcome to the board. Have you adjusted your valves? If you have fuel and spark, the only thing left is compression, which could be from a sticking or otherwise "off" valve. Another possibility would be a sheared flywheel key that would make your T mark not be in the right place relative to the crank. 1 Share this post Link to post Share on other sites
toodeep 1,733 Posted March 4, 2020 Welcome. Are you saying your T mark is at the bottom of the hole when the piston is at TDC? 2 Share this post Link to post Share on other sites
Melatv 774 Posted March 4, 2020 (edited) Hi: Big welcome here -- this may help with a couple of picture of a 420 --- line with notch Edited March 4, 2020 by Melatv 2 Share this post Link to post Share on other sites
Rancher-mudd-junkie 1 Posted March 4, 2020 I'm saying that the notch is in a different position then it is supposed to be. Should I just imagined that the knots is where it should be and time it that way? Share this post Link to post Share on other sites
Melatv 774 Posted March 4, 2020 Is the notch on threads right hand side? Share this post Link to post Share on other sites
Rancher-mudd-junkie 1 Posted March 4, 2020 1 minute ago, Melatv said: Is the notch on threads right hand side? Share this post Link to post Share on other sites
Rancher-mudd-junkie 1 Posted March 4, 2020 That's where my Notch is that dark spot right up under the T Share this post Link to post Share on other sites
Melatv 774 Posted March 4, 2020 (edited) Did you look on the threads? Edited March 4, 2020 by Melatv Share this post Link to post Share on other sites
Rancher-mudd-junkie 1 Posted March 4, 2020 Are you seeing the photos that I am posting? Share this post Link to post Share on other sites
Melatv 774 Posted March 4, 2020 The notch should be right on the threads right side Share this post Link to post Share on other sites
Rancher-mudd-junkie 1 Posted March 4, 2020 It's not where it should be Share this post Link to post Share on other sites
toodeep 1,733 Posted March 4, 2020 What are you using to try to line up the mark to verify TDC? Piston at TDC or timing marks on the cam? Share this post Link to post Share on other sites
Rancher-mudd-junkie 1 Posted March 4, 2020 I brought the piston to the top and the pushrods are lined up with one another and also in the roundabout area of the T and F Mark correct? I'm going back together with it right now after a top-end rebuild Share this post Link to post Share on other sites
shadetree 5,543 Posted March 4, 2020 the line UNDER the T mark, should line up with the line in the threads that run from outside to inside on the inspection hole, its made into the threads. Share this post Link to post Share on other sites
shadetree 5,543 Posted March 4, 2020 1 hour ago, Rancher-mudd-junkie said: impossible !!!, the line is either on right hand side, or left hand side of the threads. no way in the world is the notch at 7 o'clock like your saying. Share this post Link to post Share on other sites
toodeep 1,733 Posted March 4, 2020 20 minutes ago, Rancher-mudd-junkie said: I brought the piston to the top and the pushrods are lined up with one another and also in the roundabout area of the T and F Mark correct? I'm going back together with it right now after a top-end rebuild So when the __ mark is in the middle of the hole the piston is no longer at TDC? Share this post Link to post Share on other sites
Rancher-mudd-junkie 1 Posted March 4, 2020 12 minutes ago, shadetree said: impossible !!!, the line is either on right hand side, or left hand side of the threads. no way in the world is the notch at 7 o'clock like your saying. I would have thought that it is impossible myself but the pictures do not lie and I know I'm not the smartest crayon in the Box But there again it is not where it's supposed to be LOL Share this post Link to post Share on other sites
SlammedRanger 1,504 Posted March 4, 2020 Looks to me from the pic they machined the groove in the wrong spot in the threads. From the pic it is 100% in the 7 o'clock position? Thats not the right place for sure. It should be 9 o'clock or 3 o'clock. 1 Share this post Link to post Share on other sites
Rancher-mudd-junkie 1 Posted March 4, 2020 2 minutes ago, toodeep said: So when the __ mark is in the middle of the hole the piston is no longer at TDC? Yes it is still at TDC but could it be a notch or two off if it is not exactly TDC Share this post Link to post Share on other sites
Rancher-mudd-junkie 1 Posted March 4, 2020 1 minute ago, SlammedRanger said: Looks to me from the pic they machined the groove in the wrong spot in the threads. From the pic it is 100% in the 7 o'clock position? Thats not the right place for sure. It should be 9 o'clock or 3 o'clock. that's what I'm saying it is definitely not where it's supposed to be I was just confused and wondering if maybe someone has ever seen or ran into this rare phenomenon before LOL Share this post Link to post Share on other sites
