2milehi Posted March 31, 2011 Share Posted March 31, 2011 This probably belongs in "The Garage" but I can't post there yet. So how are the timing marks divided up? I have searched to only find conflicting data. I am assuming that the red line identifies 10° ATDC. Each division is 5° and the last mark is 20° BTDC. Is this correct? Link to comment Share on other sites More sharing options...
sewebster Posted April 1, 2011 Share Posted April 1, 2011 My understanding is that it is, from right to left, 30 BTDC, 25, 20, 15, 10, 5, 0 BTDC. So you put it on the middle mark. But however apparently there are a variety of pulleys out there. Mine is a 91. 1 Link to comment Share on other sites More sharing options...
Kingman Posted April 1, 2011 Share Posted April 1, 2011 (edited) ^ Correct. The timing marks on all VGs are the same. You do know there's a timing/emissions sticker on the hood, right...? Edited April 1, 2011 by Kingman Link to comment Share on other sites More sharing options...
2milehi Posted April 2, 2011 Author Share Posted April 2, 2011 ^ Correct. The timing marks on all VGs are the same. You do know there's a timing/emissions sticker on the hood, right...? The emissions sticker just says 15° BTDC, there is no picture explaining the various timing marks. I am not convinced that your guys are certain. The reason I ask is because I am adding a VR and a trigger wheel to the pulleys. I need to know for sure which mark is TDC. Here is an example of what I am doing. Link to comment Share on other sites More sharing options...
Kingman Posted April 2, 2011 Share Posted April 2, 2011 (edited) Not convinced that we are certain? I know exactly what I'm talking about, thanks. What sewbster posted is correct. If you want to test what I (we) know, go ahead and align the timing pin on the lower timing belt cover with the furthest left timing mark on the crank pulley. You'll find that the NO. 1 piston is all the way up, both valves are closed, and the rotor is pointed almost directly left at the NO. 1 contact on the cap. Also, the alignment dimple on the crank gear will be aligned with the notch in the oil pump lip. The key way will be facing upwards, a little to the side. Edited April 2, 2011 by Kingman Link to comment Share on other sites More sharing options...
sewebster Posted April 2, 2011 Share Posted April 2, 2011 Yep, you can check with the timing cover off, or also by sticking something in the #1 spark plug hole. Link to comment Share on other sites More sharing options...
2milehi Posted April 2, 2011 Author Share Posted April 2, 2011 Not convinced that we are certain? I know exactly what I'm talking about, thanks. What sewbster posted is correct. If you want to test what I (we) know, go ahead and align the timing pin on the lower timing belt cover with the furthest left timing mark on the crank pulley. You'll find that the NO. 1 piston is all the way up, both valves are closed, and the rotor is pointed almost directly left at the NO. 1 contact on the cap. Also, the alignment dimple on the crank gear will be aligned with the notch in the oil pump lip. The key way will be facing upwards, a little to the side. Really - you gave some info that was not correct when you said to look at my emission sticker. You are human and can make mistakes or have a misunderstand yourself. I have searched on the 'net for an explanation for setting timing and the manuals show some graphic of the timing marks. None match the VG30s, but all of the others show ATDC indications. Hence why I have my doubts. . . . . . . . OK, OK looks like you are correct. I am sorry I doubted you. I finally found a pic that explains what you were trying to say. I need to make a bracket that holds the VR sensor and I need to be certain of where TDC is. Measure twice, cut once. Link to comment Share on other sites More sharing options...
jj big shoe Posted April 2, 2011 Share Posted April 2, 2011 You might want to do a physical double check that your engine is at TDC since it looks like you've separated your pulley from your damper. You could easily bolt them back together wrong (unless you marked them). Pull #1 plug Rotate crank until air pushes out #1 plug hole (compression stroke) Insert dowel into #1 plug hole Keep rotating crank until dowel is at its highest position = TDC Link to comment Share on other sites More sharing options...
2milehi Posted April 2, 2011 Author Share Posted April 2, 2011 (edited) Thanks for the heads up. Yeah you can bolt the timing marks 6 different ways. I gotta say that this has to be Nissan's low point. This is about the most Mickey Mouse way of indicating timing marks. Edited April 2, 2011 by 2milehi Link to comment Share on other sites More sharing options...
Kingman Posted April 2, 2011 Share Posted April 2, 2011 (edited) Yeah, Nissan didn't think the pulley out to well when they designed it for the Pathfinders and I haven't figured out why they changed it. Engines like the one in my 4/87 Z31 which is a VG30, uses a single 27MM bolt to hold the crank pulley on without the 6 smaller bolts that separate it into pieces. It's all one piece and has one notch to slide over the key way on the crank gear. It's impossible to put it on wrong, therefore the timing marks will always be correct. Go to the pinned topic section in the garage, there's a link to downloading the '94 FSM. Shoulda been the first thing to do instead of finding shady pictures on the internet. Edited April 2, 2011 by Kingman Link to comment Share on other sites More sharing options...
2milehi Posted April 3, 2011 Author Share Posted April 3, 2011 Thanks for all of the help. I temporarily installed the EDIS ignition system and started up the Pf. I adjusted the trigger wheel until it read 10º BTDC and then welded it on. Link to comment Share on other sites More sharing options...
Kingman Posted April 3, 2011 Share Posted April 3, 2011 What are your goals with this? Link to comment Share on other sites More sharing options...
2milehi Posted April 6, 2011 Author Share Posted April 6, 2011 (edited) What are your goals with this? This but I am using an EDIS-6 Edited April 6, 2011 by 2milehi Link to comment Share on other sites More sharing options...
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