LeonV Posted June 17, 2013 Share #13 Posted June 17, 2013 I'm sorry Leon, I was speaking of their size and fitment.Ok. Saying that "cams '70 through '83 are the same except the turbo" doesn't convey that very well... Link to comment https://www.classiczcars.com/topic/46768-camshafts/?page=2#findComment-425841 Share on other sites More sharing options...
siteunseen Posted June 17, 2013 Share #14 Posted June 17, 2013 I have this saved in my links and it's the first thing that hit my mind, Motorsport! Performance Camshaft, Stage III, 70-83 Z/ZX Non Turbo - The Z Store! Nissan-Datsun 240Z-260Z-280Z-280ZX-300ZX(Z31/Z32)-350Z-370Z PartsI'm used to common sense thinking people, me being from Alabama, not engineers, so once again I'll apologize... Link to comment https://www.classiczcars.com/topic/46768-camshafts/?page=2#findComment-425852 Share on other sites More sharing options...
nuinqua Posted July 4, 2013 Author Share #15 Posted July 4, 2013 (edited) I'm replacing my camshaft because it was running terrible and I discovered it was broken. Is there a proper way to install the new camshaft? I heard they could break if not installed properly. Thanks. Edited July 4, 2013 by nuinqua Link to comment https://www.classiczcars.com/topic/46768-camshafts/?page=2#findComment-426870 Share on other sites More sharing options...
lenponz Posted July 4, 2013 Share #16 Posted July 4, 2013 The stamp with a "C" marking is what i use. Its off a 260 but it did have a bit more pep than an "A" cam. Externally oiled..Cam Mark A C ADate all all < 8/81 Part # 13001-E4126 N3626 E4126Intake duration 248 256 248BTC intake opens 16 20 16ABC int closes 52 56 52Int center angle 18 18 18Exhaust duration 248 256 248BBC exh opens 54 58 54ATC exh closes 14 18 14Exh center angle 20 20 20Lobe centers 109 109 109Cam lift intake 7.35 7 7.35Cam lift exh 7.35 7.35 7.35Valve lift int 10.5 10 10.5Valve lift exh 10.4 10.4 10.4 Link to comment https://www.classiczcars.com/topic/46768-camshafts/?page=2#findComment-426885 Share on other sites More sharing options...
Zed Head Posted July 4, 2013 Share #17 Posted July 4, 2013 I'm replacing my camshaft because it was running terrible and I discovered it was broken. Is there a proper way to install the new camshaft? I heard they could break if not installed properly. Thanks.The recommended way to install a used camshaft is to get everything else that was used with the shaft along with it. The cam towers, the rocker arms, the wear pads, everything. Keep everything in the same order and orientation it was removed and reinstall that way. Your camshaft might have broke because someone installed just the shaft in the old towers and it flexed and fatigued. Link to comment https://www.classiczcars.com/topic/46768-camshafts/?page=2#findComment-426888 Share on other sites More sharing options...
nuinqua Posted July 4, 2013 Author Share #18 Posted July 4, 2013 Do I tighten one tower at a time a little at a time evenly? I don't want to break the one I install. Thanks. Link to comment https://www.classiczcars.com/topic/46768-camshafts/?page=2#findComment-426896 Share on other sites More sharing options...
Zed Head Posted July 4, 2013 Share #19 Posted July 4, 2013 I'm not an expert, that's just what I've read. Other sources say never remove the cam towers. But almost everybody says to get the matching rocker arms and pieces, unless you want to buy new rocker arms. The key to knowing if the cam is installed correctly is if it rotates easily. Also, don't use the torque specs. in the "How to Rebuild..." book. There's a typo, it's too high.Any idea why your cam broke in the first place? Is it the original cam shaft or a replacement? Link to comment https://www.classiczcars.com/topic/46768-camshafts/?page=2#findComment-426900 Share on other sites More sharing options...
nuinqua Posted July 9, 2013 Author Share #20 Posted July 9, 2013 Thanks, it was the original camshaft. Not sure why it broke. It broke about six months after I drove it to Las Vegas and back from Ohio. Link to comment https://www.classiczcars.com/topic/46768-camshafts/?page=2#findComment-427241 Share on other sites More sharing options...
Jeff G 78 Posted July 9, 2013 Share #21 Posted July 9, 2013 Check your head for warpage. If the head was warped an a machine shop milled it flat, the TOP of the head will still be warped. A warped top will force the cam to bind and break. Run a straight edge along the valve cover mating surface and check all along between the straight edge and head with your thinnest feeler gauge. There should be zero gap anywhere front to back. If you don't have feeler gauges, shine a flashlight at the joint and see if light bleeds though anywhere.I would not swap the towers. I leave them alone and just keep the cam, rockers, and lash pads together. Link to comment https://www.classiczcars.com/topic/46768-camshafts/?page=2#findComment-427242 Share on other sites More sharing options...
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