Challenger Posted June 2, 2008 Share Posted June 2, 2008 Anyone know if the n42/n47 engine had 8mm or 9mm bolts on the connecting rods? Selling a set on ebay and a potential buyer wants to know. Thanks Quote Link to comment Share on other sites More sharing options...
Challenger Posted June 2, 2008 Author Share Posted June 2, 2008 Nevermind, 9mm. Thanks anyways. Quote Link to comment Share on other sites More sharing options...
Xnke Posted June 3, 2008 Share Posted June 3, 2008 uhhhh....NO. the L28 got 8mm rods, period. Unless the rods have been drilled and fitted with 9mm bolts, which i guess could be done. Quote Link to comment Share on other sites More sharing options...
Challenger Posted June 3, 2008 Author Share Posted June 3, 2008 I saw that the 9mm bolts have a 14mm bolt, and the 8mm have a 13mm. I tried the 13mm wrench and it was to small... Quote Link to comment Share on other sites More sharing options...
junglist Posted June 3, 2008 Share Posted June 3, 2008 I saw that the 9mm bolts have a 14mm bolt, and the 8mm have a 13mm. I tried the 13mm wrench and it was to small... Different bolts of the same metric thread size can have different head sizes. You might want to measure the actual threaded area of the bolts with a caliper to be sure. Quote Link to comment Share on other sites More sharing options...
X64v Posted June 4, 2008 Share Posted June 4, 2008 uhhhh....NO. the L28 got 8mm rods, period. Unless the rods have been drilled and fitted with 9mm bolts, which i guess could be done. uhhhhh.....NO. The L26 and L28 both had 9mm bolts. Quote Link to comment Share on other sites More sharing options...
Challenger Posted June 4, 2008 Author Share Posted June 4, 2008 uhhhhhh.... which one... Quote Link to comment Share on other sites More sharing options...
Xnke Posted June 4, 2008 Share Posted June 4, 2008 If that's the case, then why all the hullaballoo about 9mm L24 rods? On a side note, one of my projects in the ME lab was tensile testing of various fasteners of my choice. By tensile test in the lab at school, the old datsun 8mm and 9mm rod bolts for the L24 fail within 100lbs of each other... Quote Link to comment Share on other sites More sharing options...
X64v Posted June 4, 2008 Share Posted June 4, 2008 If that's the case, then why all the hullaballoo about 9mm L24 rods? Because they're longer than the L28 rods, giving a better rod/stroke ratio, yet have the same bolt size, yielding the same strength. They want the 9mm instead of the 8mm so they don't give up any strength by switching rods. Quote Link to comment Share on other sites More sharing options...
Xnke Posted June 4, 2008 Share Posted June 4, 2008 Sounds reasonable. I'd venture a guess that some of the early L26's with 8mm bolts had some bolt breaking issues, what with the (possibly) greater forces on them. Quote Link to comment Share on other sites More sharing options...
josh817 Posted June 4, 2008 Share Posted June 4, 2008 Tell me what model and year these rods are from and I'll look in the How To Mod Your Datsun OHC Engine. They have a chart and everything. Quote Link to comment Share on other sites More sharing options...
1 fast z Posted June 4, 2008 Share Posted June 4, 2008 uhhhh....NO. the L28 got 8mm rods, period. Unless the rods have been drilled and fitted with 9mm bolts, which i guess could be done. Dont you just love it when these un-experienced guys say "PERIOD". And they are totally wrong! Dont act so confident, if you are not speaking from experience, that is how internet myths get started. To answer, any 130mm rod is 9mm. Quote Link to comment Share on other sites More sharing options...
woldson Posted June 4, 2008 Share Posted June 4, 2008 Period. Heehee....... Quote Link to comment Share on other sites More sharing options...
Xnke Posted June 5, 2008 Share Posted June 5, 2008 Well, 1 Fast Z, I may be inexperienced, but I do have an incomplete set of 130mm rods with 8mm bolts. There are (I think) 3 rods left, they were sacrificed to the tensile test gods in the lab at school. the 8mm and 9mm rods were tensile tested and failed within 100lbs of each other, both in the section of the bolt right around where the split is in the bearing, WHEN the rod bolt was the failure point. when the rod bolts didn't fail, the failure happened at the oil hole drilled in the upper part of the rod, once the rod broke straight across, the other one that failed this way broke in a jagged diagonal. I would post graphs and figures, however I am no longer allowed at that school. I couldn't cut it in calculus II, regardless of how well I was doing in my other classes. Quote Link to comment Share on other sites More sharing options...
Challenger Posted June 5, 2008 Author Share Posted June 5, 2008 Why arent you allowed there anymore.... what did you do? Quote Link to comment Share on other sites More sharing options...
Careless Posted June 5, 2008 Share Posted June 5, 2008 *rolls two dice* I got cat-eyes. maybe my bolts are 11mm Quote Link to comment Share on other sites More sharing options...
Xnke Posted June 5, 2008 Share Posted June 5, 2008 Why arent you allowed there anymore.... what did you do? As I said, I couldn't pass calculus II. They sent me the "go home, and don't come back next semester" letter. Quote Link to comment Share on other sites More sharing options...
Careless Posted June 5, 2008 Share Posted June 5, 2008 so how do we know whether or not your perception of the difference between 8mm and 9mm are correct.... JUST KIDDING It'd rock if you ever got your hands on the info. cool project to do! Quote Link to comment Share on other sites More sharing options...
josh817 Posted June 5, 2008 Share Posted June 5, 2008 Ok you guys are bugging me... Let me just settle it all now... NO MORE BICKERING. XD Quote Link to comment Share on other sites More sharing options...
Challenger Posted June 5, 2008 Author Share Posted June 5, 2008 -"(++++++*******--9mm--*******+++++++)"- Quote Link to comment Share on other sites More sharing options...
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