Bike of the Year voting in the Clubhouse
https://ngwclub.com/forum/viewtopic.php?t=78995#p828493
https://ngwclub.com/forum/viewtopic.php?t=78995#p828493
Tip for refitting heads or changing belts
Moderators: Whiskerfish, Forum Moderators
- mooseheadm5
- Platinum Member
- Posts: 1660
- Joined: Sun Jan 27, 2008 10:11 pm
- Location: Charlottesville
Tip for refitting heads or changing belts
I just swapped heads on my 77 (8 bent valves from PO) and one thing that made it super easy (and reduced the anxiety level quite a bit) was that I loosened the tappet adjusters all the way before fitting the heads. I have changed countless timing belts on interference engined cars without doing this, but wanted to be safe here and that seemed to be the best way. I always do this when swapping heads on car engines where possible, belt or chain, and have not f'dup yet! This reduced the valve lift to next to nil. I put the heads on the wing with the cams at a neutral position (no valves open, which I think you can only do if the tappets are loose) then after torquing, set the cams at their TDC positions. This is much easier when you do not have to fight the valve springs much, plus the cams do not want to snap back or forward so you do not necessarily need to use Octane's zip-tied wrench trick. Also reduces the chance of damaging open valves with the piston, or by dropping the head or misalligning it or whatever. It may give enough clearance to make the motor non interference while assembling BUT I did not check this (I will do this on my spare motor later, though.) After timing the cams, I timed the crank, threw on the belts, tensioning the left bank belt first, then turning the motor over 1 revolution and tensioning the right belt. Carefully turned motor over by hand several times and rechecked cam timing and belt tension. When I was satisfied, I set the valve clearances back to spec and ran through again by hand several times to make sure there was no valve contact. Had no problems with this method, and the bike fired right up after I installed the plug wires correctly (duh.) Hope this helps.
It's not what people know that gets them into trouble, but what they know that ain't so. -Variously ascribed
-P
[b][color=blue][url=http://www.ladyada.net/learn/multimeter/]Learn to use a Multimeter, Click here![/url][/color][/b]
-P
[b][color=blue][url=http://www.ladyada.net/learn/multimeter/]Learn to use a Multimeter, Click here![/url][/color][/b]
- muaymendez1
- Chrome Member
- Posts: 111
- Joined: Thu Mar 27, 2008 8:41 pm
- Location: union county Rahway Nj
Just make sure when taking the belts off that you mark the crank pulley as well as the cam pulleys. I saw marks on my previous wings pulleys and thought that would be fine.
I didnt realize till after everything ws together that the right side was 180 degrrees off. I made sure to turn the motor over by handto make sure no interference was going on. all seemed fine.
When cranked the bike even ran but the staerter did no want to turn the motor to well.
The bike will run with the cam pulley 180 out but will not run well.
I didnt realize till after everything ws together that the right side was 180 degrrees off. I made sure to turn the motor over by handto make sure no interference was going on. all seemed fine.
When cranked the bike even ran but the staerter did no want to turn the motor to well.
The bike will run with the cam pulley 180 out but will not run well.
Do what you love, love what you do . Live happier
- mooseheadm5
- Platinum Member
- Posts: 1660
- Joined: Sun Jan 27, 2008 10:11 pm
- Location: Charlottesville
Good point. There is a mark on the crank (make sure you go for T1, not T2) and there are marks on the pulleys, but they are small. White out is good for marking things. The right side pulley clearly says UP at the top so you know which arrow to use to line it up, but you can never be too safe. Always pull it through by hand at least 2 full revolutions and recheck timing. If you feel any mechanical resistance, STOP, turn back and check again.
It's not what people know that gets them into trouble, but what they know that ain't so. -Variously ascribed
-P
[b][color=blue][url=http://www.ladyada.net/learn/multimeter/]Learn to use a Multimeter, Click here![/url][/color][/b]
-P
[b][color=blue][url=http://www.ladyada.net/learn/multimeter/]Learn to use a Multimeter, Click here![/url][/color][/b]
- shoe
- Tin Member
- Posts: 14
- Joined: Wed Apr 16, 2008 5:25 am
- Location: Minnesota
- scmedic6
- Cast Iron Member
- Posts: 59
- Joined: Fri Apr 04, 2008 3:28 am
- Location: Augusta Ga
warped cam pully
Hey, Something strange happened the other day. Finishing up a carb rebuilding project on a bike that has been idol for 5 years. synking the carbs when I noticed a scraping and rubbing noise on the left timing cover side. also noticed the cover getting very hot quickly. took the timing cover off and the pully started rubbing the inside of housing. became very warped.??????? What would make the pully all of a sudden warp? I almost ready to put it back on the road and dont want the other side to do the same. what say the forum? fluke of nature? bad karma? sign from Above? Gregg
1978 GL1000 naked restoring
1983 Gl1100 dressed just aquired
1983 Gl1100 dressed just aquired
- Frenchy
- True Blue Steel Biker
- Posts: 2850
- Joined: Sat Jan 22, 2005 12:15 am
- My Album: http://www.ngwclub.com/gallery/v/wingmans/frenchy1
- Location: Prescott Valley, AZ
- Contact:
Re: warped cam pully
I haven't run across a warped timing pully before...... Sounds like it may have been damaged by the PO..... Either way you need to swap it out. I'm sute I've got a good used one laying around, for a reasonable price. Of they're on Fleebay as well..scmedic6 wrote:Hey, Something strange happened the other day. Finishing up a carb rebuilding project on a bike that has been idol for 5 years. synking the carbs when I noticed a scraping and rubbing noise on the left timing cover side. also noticed the cover getting very hot quickly. took the timing cover off and the pully started rubbing the inside of housing. became very warped.??????? What would make the pully all of a sudden warp? I almost ready to put it back on the road and dont want the other side to do the same. what say the forum? fluke of nature? bad karma? sign from Above? Gregg
Frenchy
- Hanky Panky
- Brass Member
- Posts: 30
- Joined: Fri Mar 28, 2008 11:11 pm
- Location: Cape Cod,Massachusetts
- mooseheadm5
- Platinum Member
- Posts: 1660
- Joined: Sun Jan 27, 2008 10:11 pm
- Location: Charlottesville
I had 0 compression on all cylinders. Generally if you want to test for bent valves that may be only lightly bent, you want to do a leakdown test if the heads are on the motor. If they are off, you may be able to see the spot where they hit, or light through the port or you can turn the head upside down and pour some solvent into the chamber and see if it leaks out of one of the ports. Did that help? if not, lemme know.
It's not what people know that gets them into trouble, but what they know that ain't so. -Variously ascribed
-P
[b][color=blue][url=http://www.ladyada.net/learn/multimeter/]Learn to use a Multimeter, Click here![/url][/color][/b]
-P
[b][color=blue][url=http://www.ladyada.net/learn/multimeter/]Learn to use a Multimeter, Click here![/url][/color][/b]
- scmedic6
- Cast Iron Member
- Posts: 59
- Joined: Fri Apr 04, 2008 3:28 am
- Location: Augusta Ga
valve job gone bad
Hey, not sure this is the place to post this, But I need some help. after replacing the head gaskets on my 83 gl1100 i am having a hard time getting the valves adjusted. when I set the timing and adjust the valves according to the first sequence( #1 intake and exaust,#3 Exaust, and #4 intake) . all is well until I rotate the crank 360deg for the second sequence, which puts the #1 piston on it's exaust stroke. The valves that I adjusted the first time are hitting the #1 piston, causing my engine to lock up. when I back them off, the engine turns. What am I overlooking? something simple I imagine. been working on all weekend and am ready to get finished and ride tomorrow. Thanks
1978 GL1000 naked restoring
1983 Gl1100 dressed just aquired
1983 Gl1100 dressed just aquired
- mooseheadm5
- Platinum Member
- Posts: 1660
- Joined: Sun Jan 27, 2008 10:11 pm
- Location: Charlottesville
You may have one bank 180 degrees out! Be very careful how you proceed! You need to go back to square 1 for belting the motor. Slacken all the adjusters all the way, set the crank at TDC (T1 mark) and then check to make sure you are lining up the cams correctly. The pulleys each have 2 marks, but usually people would mess up the right bank by not noticing that the pulley is marked "UP" and that when the motor is TDC on 1, the "UP" is up and the marks should then line up properly. Hope you didn't bend anything by forcing it.
It's not what people know that gets them into trouble, but what they know that ain't so. -Variously ascribed
-P
[b][color=blue][url=http://www.ladyada.net/learn/multimeter/]Learn to use a Multimeter, Click here![/url][/color][/b]
-P
[b][color=blue][url=http://www.ladyada.net/learn/multimeter/]Learn to use a Multimeter, Click here![/url][/color][/b]
- scmedic6
- Cast Iron Member
- Posts: 59
- Joined: Fri Apr 04, 2008 3:28 am
- Location: Augusta Ga
Hey Moose head, Thanks for your reply. I'm heading back out there to check it out. BTW just confirming, the pulley for the right side and the left side are the same except for how there are turned. right? I will send photos in a few mins Thanks
1978 GL1000 naked restoring
1983 Gl1100 dressed just aquired
1983 Gl1100 dressed just aquired
- mooseheadm5
- Platinum Member
- Posts: 1660
- Joined: Sun Jan 27, 2008 10:11 pm
- Location: Charlottesville
Correct. I believe that the pulley on the right side, when installed correctly has an R on it somewhere. The PO of my wing I believe set the timing with new belts on T2 NOT T1 as he was supposed to. This bent every single valve when he cranked it over. I cannot think of any other way to do this.
It's not what people know that gets them into trouble, but what they know that ain't so. -Variously ascribed
-P
[b][color=blue][url=http://www.ladyada.net/learn/multimeter/]Learn to use a Multimeter, Click here![/url][/color][/b]
-P
[b][color=blue][url=http://www.ladyada.net/learn/multimeter/]Learn to use a Multimeter, Click here![/url][/color][/b]
- Rat
- Photo Gallery Admin
- Posts: 15706
- Joined: Fri Oct 21, 2005 9:59 pm
- My Album: https://www.ngwclub.com/gallery/v/wingmans/rat/
- RIP: cookie, KyPM, Roady
- Location: Toronto .... Canada
-
- Cast Iron Member
- Posts: 82
- Joined: Tue Dec 18, 2018 9:35 am
- Location: South Africa
Re: Tip for refitting heads or changing belts
Quick question how on this.
Im installing my new belts.
My left pulley has its timing mark a tooth or two above the cover plate’s alignment mark. In order to get it to lign up, i need to rotate the pulley somewhat clockwise, which has a cam lobe starting to engage a valve. The adjusters are backed out all the way. Does this sound correct? After reading all the how to’s I was under the impression the left side cam will not be engaged when setting the timing belt...?
Im installing my new belts.
My left pulley has its timing mark a tooth or two above the cover plate’s alignment mark. In order to get it to lign up, i need to rotate the pulley somewhat clockwise, which has a cam lobe starting to engage a valve. The adjusters are backed out all the way. Does this sound correct? After reading all the how to’s I was under the impression the left side cam will not be engaged when setting the timing belt...?
'75 GL1000 project, '82 Kawasaki GT750 turbo project.
ex: K6 GSXR1000, '07 Hyabusa
ex: K6 GSXR1000, '07 Hyabusa
- pidjones
- SUPER BIKER!!!!
- Posts: 3285
- Joined: Wed May 22, 2013 4:06 pm
- Location: East TN
Re: Tip for refitting heads or changing belts
Yep. That's why it is suggested to get down on plane with the cam to sight it in. I can usually rotate the pulley with a 12mm to put it on line.GT-Ron wrote:Quick question how on this.
Im installing my new belts.
My left pulley has its timing mark a tooth or two above the cover plate’s alignment mark. In order to get it to lign up, i need to rotate the pulley somewhat clockwise, which has a cam lobe starting to engage a valve. The adjusters are backed out all the way. Does this sound correct? After reading all the how to’s I was under the impression the left side cam will not be engaged when setting the timing belt...?
"Love 'em all.... let God sort 'em out!"
Ex 2006 GL1800 - the Black Pearl SOLD! to make room for:
2021 Can-Am Spyder RT Limited Dark Chalk Metallic
1975 Red GL1000 project - ex Pistol Pete project
1972 Triumph T150V Trident rescue - finished and FOR SALE!
1976 Yamaha RD400c
1978 GL1000 with '75 engine - the Hunley
Ex 1978 GL1000
Ex 1979 GL1000
Ex '79 CB750F rat bike
Ex '86 SEi
Ex '77 GL1000
Ex '76 RD400
Ex '72 Penton 125 set up for flat track
Ex '73 RD250
Ex '68 TR6C - chopped
Ex 2006 GL1800 - the Black Pearl SOLD! to make room for:
2021 Can-Am Spyder RT Limited Dark Chalk Metallic
1975 Red GL1000 project - ex Pistol Pete project
1972 Triumph T150V Trident rescue - finished and FOR SALE!
1976 Yamaha RD400c
1978 GL1000 with '75 engine - the Hunley
Ex 1978 GL1000
Ex 1979 GL1000
Ex '79 CB750F rat bike
Ex '86 SEi
Ex '77 GL1000
Ex '76 RD400
Ex '72 Penton 125 set up for flat track
Ex '73 RD250
Ex '68 TR6C - chopped
-
- Similar Topics
- Replies
- Views
- Last post
-
- 7 Replies
- 1263 Views
-
Last post by Graham Cracker
-
- 14 Replies
- 1730 Views
-
Last post by CYBORG
-
- 25 Replies
- 1850 Views
-
Last post by jdvorchak