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Has anyone had any experience replacing the four outer crown nuts on cylinder head by removing one nut at a time, installing the new part and re-torqueing before moving to the next one? I'm familiar with the textbook answer which is if you loosen the torque the head gasket could breech/head warpage but what I'm looking for is people who have actually done this and had success or failure with a decent amount of mileage on the motor after the retrofit.
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Taking off one at a time and replacing will not hurt anything. The torque value is only 25 ft/lb. Apply oil to the threads before torquing. Yes I have done this.Last edited by bikerphil; 08-30-2023, 04:08 PM.2H7 (79) owned since '89
3H3 owned since '06
"If it ain't broke, modify it"
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I've wire brushed them with a Dremel tool and painted them Rustoleum silver. They came out pretty decent if that's what you are looking to improve.-Mike
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'79 XS1100SF 20k miles
'80 XS1100SG 44k miles
'81 XS1100H Venturer 35k miles
'79 XS750SF 17k miles
'85 Honda V65 Magna ~7k miles
'84 Honda V65 Magna 48k miles (parts bike)
'86 Yamaha VMAX 9k miles
Previous: '68 Motoguzzi 600cc + '79 XS750SF 22k miles +'84 Honda V65Comment
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I have done it, too. No issues."Galaxy" 1982 XJ1100J, 1983 XV handlebars, new fusebox, homemade SS wind screen and SS muffler heat shields, homemade grab bar extension and luggage rack. XS750 140 mph speedo, '81 Venture oil cooler, V-Max ACCT, Yahman YICS Eliminator, 1st and 2nd gear Dremel fix.Comment
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I'm glad this has worked for a few of your motors. I am going to give it a try.Comment
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Mine are looking pretty crusty, thanks for the info!1980 XS1100G
I identify as a man but according to the label on a package of Stauffers Baked Lasagne I'm actually a family of four!Comment
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I did mine the same way. replaced with stainless acorn nutsSlow down and enjoy life. If you are in that much of a hurry, you should have left eariler.
Current rides:
80 XS1100SG
82 JX1100
83 Venture Royale
86 V-MaxComment
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Do you remember the size and thread pitch? Is it M10 x 1.0mm?
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Acorn nut is M10X1.252H7 (79) owned since '89
3H3 owned since '06
"If it ain't broke, modify it"
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1980 XS1100G
I identify as a man but according to the label on a package of Stauffers Baked Lasagne I'm actually a family of four!Comment
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Not too many farkles still available for our bikes
2H7 (79) owned since '89
3H3 owned since '06
"If it ain't broke, modify it"
☮Comment
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Thank you, gentlemen. Very helpful info.Comment
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