lifted club cars - lifted ezgo
Home FAQDonate Who's Online
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Gas Yamaha
Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles



Post New Thread  Reply
 
Thread Tools Display Modes
Old 04-18-2017, 08:39 PM   #1
icyveins
Gone Wild
 
icyveins's Avatar
Yamaha
 
Join Date: Mar 2013
Location: DORR MI
Posts: 230
Default G9 crank grind

I had my crankshaft ground to .010 undersized which put me at 1.245 inch.

stock crank should be 1.258-1.259......... so I ordered .010 under bearings.... would that be right? I assembled tonight and torqued rod cap to 38lbs and went to rotate the assembly and it had a mile of play on the rod..........

I disassembled the rod and took the piston back out of the block and put the rod back together and torqued to specs without the crank. I measured the bearing opening and it measured what the stock crank should measure. 1.256
I know I order the correct bearings on the package it was -

J38-11656-10 this is the bearing I am using

j38-11656-20

I ordered both because I didnt know what the crank size would be ground down to and I am on time constraint.
icyveins is offline   Reply With Quote
Alt Today
BGW

Golf car forum Sponsored Links

__________________
This advertising will not be shown in this way to registered members.
Register your free account today and become a member on Buggies Gone Wild Golf Cart Forum
   
Old 04-19-2017, 08:39 PM   #2
sho305
Vegas modded 420
 
sho305's Avatar
Yamaha
 
Join Date: Jun 2009
Location: West MI
Posts: 15,433
Default Re: G9 crank grind

That is .013-.014 under not .010. Can you ask the party that ground the crank about it? Manual says .0008-.002 clearance, .004 max for rod bearing on crank. Manual says there are two crank pin sizes, two rod sizes, and three bearing sizes to fit those. They are marked.
sho305 is offline   Reply With Quote
Old 04-20-2017, 06:56 AM   #3
icyveins
Gone Wild
 
icyveins's Avatar
Yamaha
 
Join Date: Mar 2013
Location: DORR MI
Posts: 230
Default Re: G9 crank grind

crank is now at 1.245. I am finding a used crank to put back in.
don't make the mistake that I did and assume that you can get undersized bearings for these engines...... I will have the undersize crank weld and regrind at some point and assemble a different engine with it. unfortunetly I do not see a number on the connecting rod that would indicate which one it is. does anyone know the numbers on the side of the rod that would help identify which rod it is.?
icyveins is offline   Reply With Quote
Old 04-22-2017, 07:15 PM   #4
sho305
Vegas modded 420
 
sho305's Avatar
Yamaha
 
Join Date: Jun 2009
Location: West MI
Posts: 15,433
Default Re: G9 crank grind

Its a number on the rod right where the cap meets the rod, right over the seam. Crank marked on side of counter weight. I don't know what the different sizes are, or what the numbers mean.

Crank pin size:
no 1 1.2583-1.2587
no 2 1.2580-1.2583

Rod, I think bore size of rod not bearing
no 0 1.3784-1.3789
no 1 1.3780-1.3784

Subtract rod size number from crank pin number to find bearing
no 0 brown j38-11656-00
no 1 black xxxxxxxx -10
no 2 blue xxxxxxxx -20

Does that make sense, you take crank number (1 or 2) minus rod number (0 or 1) and pick bearing from that code. Bearings should have that color on the side right in center of a half. So I guess the bearing bore and thickness could be different.
sho305 is offline   Reply With Quote
Old 05-05-2017, 10:10 AM   #5
ironmonkey17
Gone Wild
 
ironmonkey17's Avatar
Mixed Breed
 
Join Date: Apr 2014
Location: Ohio
Posts: 960
Default Re: G9 crank grind

Hey Sho305 I decided to do a rebuild on my G2 engine and I'm having an issue with the crank bearing (which one do I need) not seeing any marks on the Rod I do see a 2 on the crank.. what other options do I have to figure this out?
Attached Images
File Type: jpg 20170505_105050.jpg (241.7 KB, 0 views)
File Type: jpg 20170505_104931.jpg (209.9 KB, 0 views)
File Type: jpg 20170505_104730.jpg (176.5 KB, 0 views)
File Type: jpg 20170505_104840.jpg (259.0 KB, 0 views)
File Type: jpg 20170505_104822.jpg (199.5 KB, 0 views)
ironmonkey17 is offline   Reply With Quote
Old 05-05-2017, 10:14 AM   #6
ironmonkey17
Gone Wild
 
ironmonkey17's Avatar
Mixed Breed
 
Join Date: Apr 2014
Location: Ohio
Posts: 960
Default Re: G9 crank grind

Sorry about the highjack icyveins, only post that really came up on search..
ironmonkey17 is offline   Reply With Quote
Old 05-05-2017, 06:47 PM   #7
smallblock450sl
Sometime's............
 
smallblock450sl's Avatar
Yamaha
 
Join Date: Oct 2007
Location: Tacoma Washington
Posts: 11,868
Default Re: G9 crank grind

In this case (can not read the rod ink mark) I go with -10. BUT, plastigauge is the true test!
smallblock450sl is offline   Reply With Quote
Old 05-05-2017, 07:03 PM   #8
ironmonkey17
Gone Wild
 
ironmonkey17's Avatar
Mixed Breed
 
Join Date: Apr 2014
Location: Ohio
Posts: 960
Default Re: G9 crank grind

ok thanks smallblock450sl i'm taking the block to be bored .50mm on Wednesday, maybe the guy will have a plastigage to check it out, I did see this in the manual.. and of course there was no mark for the balancer neither, I did mark it before I took it apart but when I blasted the crank with degreaser I lost the paint mark I put on it..
ironmonkey17 is offline   Reply With Quote
Old 05-05-2017, 07:14 PM   #9
smallblock450sl
Sometime's............
 
smallblock450sl's Avatar
Yamaha
 
Join Date: Oct 2007
Location: Tacoma Washington
Posts: 11,868
Default Re: G9 crank grind

G2/G9/G14 timing marks...you will need to back off the crank to get the bancer alighned.
Attached Images
File Type: jpg P9290298.jpg (129.5 KB, 0 views)
smallblock450sl is offline   Reply With Quote
Old 05-05-2017, 07:35 PM   #10
sho305
Vegas modded 420
 
sho305's Avatar
Yamaha
 
Join Date: Jun 2009
Location: West MI
Posts: 15,433
Default Re: G9 crank grind

That is why I posted the sizes, should be able to measure the rod and find out. If the ink is gone, its gone, kind of half baked to use ink to ID inside an engine. They make things called stamps and scribes and all that.
sho305 is offline   Reply With Quote
Reply
Go Back   Buggies Gone Wild Golf Cart Forum > Golf Cart Repair and Troubleshooting > Gas Yamaha


Thread Tools
Display Modes


Similar Threads
Thread Forum
Rear wheel grind that I cannot solve Electric EZGO
2007 YDRE axle grind Electric Yamaha
ezgo dcs grind Electric EZGO
Yamaha G2 Axle grind? Gas Yamaha
98 dcs rear end grind noise Electric EZGO


All times are GMT -5. The time now is 01:59 AM.


Club Car Electric | EZGO Electric | Lifted Golf Carts | Gas EZGO | Used Golf Carts and Parts

Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
This Website and forum is the property of Buggiesgonewild.com. No material may be taken or duplicated in part or full without prior written consent of the owners of buggiesgonewild.com. © 2006-2017 Buggiesgonewild.com. All rights reserved.