laytonanthony Posted May 27, 2015 Share Posted May 27, 2015 Hi Guys Need some help figuring out what bearing grades i need to re-build my nissan engine. I have stripped the engine and removed the crank as its no good. I have now received my new crank. My new Cranks markings are below and below that the diagram to get the bearing grades. Im having trouble understanding the chart to determine which grade bearings I need. If someone could be of any help i would be very much grateful. New Crankshaft stamps EMMKN FEHHHH K= Identification number M=Journal diameter grade no.1 M=Journal diameter grade no.2 K=Journal diameter grade no.3 N=Journal diameter grade no.4 F= Pin diameter grade no. 1 E= Pin diameter grade no. 2 H= Pin diameter grade no. 3 H= Pin diameter grade no. 4 H= Pin diameter grade no. 5 H= Pin diameter grade no. 6 Connecting Rods stamps Cylinder 1= 0E5U - G11E Cylinder 2= 0E5U - G22E Cylinder 3= 0E5U - H33H Cylinder 4= 0E5U - J44E Cylinder 5= 0E5U - L55E Cylinder 6= 0E5U - L66E Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted May 27, 2015 Share Posted May 27, 2015 Are you fitting a brand new (unused) crank and rods? Is the motor a VQ35DE? Quote Link to comment Share on other sites More sharing options...
Ebized Posted May 27, 2015 Share Posted May 27, 2015 Its a 370 engine Alex- see here: http://www.350z-uk.c...engine-rebuild/ Quote Link to comment Share on other sites More sharing options...
laytonanthony Posted May 27, 2015 Author Share Posted May 27, 2015 (edited) Ok I was getting confused as that diagram only shows you how to find the Big end bearing grades and not the main bearing grades. First 4 digits are for main bearing grades (MMKN) but I need to remove the head to find the other marks on top of the block too match up the main bearings. This chart basically matches up the Connecting rod diameter with the crank shaft journal. So with Crank markings F E H H H H rod markings G G F J L L grades on chart 1 1 2 2 2 2 Just matched them up to get the grades. Is that right? Edited May 27, 2015 by laytonanthony Quote Link to comment Share on other sites More sharing options...
laytonanthony Posted May 27, 2015 Author Share Posted May 27, 2015 No Alex its the VQ37VHR I'm fitting a new crank and 1x new connecting rod which i have the markings of both new parts and old parts! Quote Link to comment Share on other sites More sharing options...
laytonanthony Posted May 27, 2015 Author Share Posted May 27, 2015 Here is the diagram for the main bearings!!!!! Quote Link to comment Share on other sites More sharing options...
evilscorp Posted May 27, 2015 Share Posted May 27, 2015 (edited) Why not just measure each journal and big end then order some ACL bearings to suit the desired gap? Slight polish of the crank if needed to get them all even. Then plasti gauge to check its all good. Edited May 27, 2015 by evilscorp Quote Link to comment Share on other sites More sharing options...
laytonanthony Posted May 27, 2015 Author Share Posted May 27, 2015 More complications tbh. Im not an engine builder and have no more interest in the car. As soon as its repaired its being sold as i want a GTR. OEM parts are just fine for me! Thanks for your advice anyway. 1 Quote Link to comment Share on other sites More sharing options...
ZMANALEX Posted May 27, 2015 Share Posted May 27, 2015 (edited) My best advice is to hire an experienced engine builder, otherwise I guess that this may all end in tears. It is not rocket science however you do require a considerable level of build experience to carry out the build properly. If the crank was not bent then why did you not just get it turned at a machine shop ? Alex. Edited May 27, 2015 by ZMANALEX Quote Link to comment Share on other sites More sharing options...
laytonanthony Posted May 27, 2015 Author Share Posted May 27, 2015 The Engine is at the engine builders!!! He is a friend of mine so I am helping strip it apart to save on the pennies!!! I removed the engine myself as well and plan on putting it back in as well. The crank was bent and could not be machined! TBH I genuinely think I could re-build it myself but again not worth the risk! Quote Link to comment Share on other sites More sharing options...
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