DarkSideR
Member
Posts: 1793
To be good, and to do good, is all we have to do.
Pueblo, Colorado
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« on: July 27, 2018, 11:15:03 AM » |
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I had my Pulse Signal Generators go bad, and had replaced them.
Before taking everything apart I turned the crank to T1,2 & noted both cams were on the marks with "UP" reading correctly. I only removed the right side timing belt.
I replaced the Signal Generators, put the timing belt back on, and set the tension. Hand turned the motor and double checked the marks. Fired up the bike to find at idle all was well, however upon any RPM's above idle there is a noticeable sound coming from the right valves. Sounds like the valves are out of adjustment, but I know that isn't the case having recently done them.
What didn't I do?
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2001 Valkyrie Super Tourer VRCC#34410 VRCCDS#0263  |
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Chrisj CMA
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« Reply #1 on: July 27, 2018, 12:39:57 PM » |
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I had my Pulse Signal Generators go bad, and had replaced them.
Before taking everything apart I turned the crank to T1,2 & noted both cams were on the marks with "UP" reading correctly. I only removed the right side timing belt.
I replaced the Signal Generators, put the timing belt back on, and set the tension. Hand turned the motor and double checked the marks. Fired up the bike to find at idle all was well, however upon any RPM's above idle there is a noticeable sound coming from the right valves. Sounds like the valves are out of adjustment, but I know that isn't the case having recently done them.
What didn't I do?
Did anything turn at all while the belt was off? For sure I'd do. Compression test. Compare left to right |
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« Last Edit: July 30, 2018, 04:57:11 AM by Chrisj CMA »
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sandy
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« Reply #2 on: July 27, 2018, 03:11:13 PM » |
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It's easy to install the belt one tooth off and not notice it. Pull the belt cover again and double check it. Recheck the bolts for the pulse generators and belt tensioners too.
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DarkSideR
Member
Posts: 1793
To be good, and to do good, is all we have to do.
Pueblo, Colorado
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« Reply #3 on: July 27, 2018, 03:15:48 PM » |
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It's easy to install the belt one tooth off and not notice it. Pull the belt cover again and double check it. Recheck the bolts for the pulse generators and belt tensioners too.
Checked, checked, and double checked. Wondering if if I installed the generators switched. I did not pay attention when I took the old ones out. I use the longer lead for the bottom generator and the shorter lead for the top generator. Don't know if the bike would even run if they were switched. |
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2001 Valkyrie Super Tourer VRCC#34410 VRCCDS#0263 |
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ETC
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« Reply #4 on: July 29, 2018, 08:15:44 AM » |
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Try running it with the cover off, that may reveal the cause
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Chrisj CMA
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« Reply #5 on: July 30, 2018, 04:58:20 AM » |
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DarkSider. Did you ever figure out what happened?
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Forge
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« Reply #6 on: July 30, 2018, 06:13:10 AM » |
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Following.
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DarkSideR
Member
Posts: 1793
To be good, and to do good, is all we have to do.
Pueblo, Colorado
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« Reply #7 on: July 30, 2018, 06:24:54 AM » |
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DarkSider. Did you ever figure out what happened?
No. I rode it to church yesterday. Idles and runs fine, but the noise coming from the right side of the engine is bad. Loud enough to hear it in my helmet at 55mph. I am borrowing a compression gauge today, and will compare the right cylinders, to the left. I have remember something, something odd happened when I took the belt off. I got the timing marks lined up, removed the tensioner wheel, and removed the belt. Then Cam wheel then spun, like it was pre-loaded. The wheel spun maybe 20 degrees, and I had to use a lever to spin it back. It happened quick, and was reset quickly so it escaped my mind. I'm pretty sure I have a bent valve  |
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2001 Valkyrie Super Tourer VRCC#34410 VRCCDS#0263 |
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Cracker Jack
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« Reply #8 on: July 30, 2018, 07:30:10 AM » |
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DarkSider. Did you ever figure out what happened?
No. I rode it to church yesterday. Idles and runs fine, but the noise coming from the right side of the engine is bad. Loud enough to hear it in my helmet at 55mph. I am borrowing a compression gauge today, and will compare the right cylinders, to the left. I have remember something, something odd happened when I took the belt off. I got the timing marks lined up, removed the tensioner wheel, and removed the belt. Then Cam wheel then spun, like it was pre-loaded. The wheel spun maybe 20 degrees, and I had to use a lever to spin it back. It happened quick, and was reset quickly so it escaped my mind. I'm pretty sure I have a bent valve If it idles and runs fine, I'd say it's unlikely you have a bent valve.  P. S. The cam movement was the result of a valve spring(s) pushing on a cam lobe(s). There's just not enough force exerted by the spring(s) to bend a valve. |
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« Last Edit: July 30, 2018, 10:01:14 AM by Cracker Jack »
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Chrisj CMA
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« Reply #9 on: July 30, 2018, 08:58:58 AM » |
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If indeed it only turned 20 degrees then I agree it’s unlikely that was enough force to bend a valve. 20 degrees is roughly the travel from one pair of valves to the next. If to turned a bit more than that then it went totally past at least one valve and good chance of damage. The sound you describe is that of a bent valve.
Stop riding it in case the valve breaks off and does worse damage
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gordonv
Member
Posts: 5760
VRCC # 31419
Richmond BC
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« Reply #10 on: July 30, 2018, 02:47:49 PM » |
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I have remember something, something odd happened when I took the belt off. I got the timing marks lined up, removed the tensioner wheel, and removed the belt. Then Cam wheel then spun, like it was pre-loaded. The wheel spun maybe 20 degrees, and I had to use a lever to spin it back. It happened quick, and was reset quickly so it escaped my mind.
More likely the compression in the cylinder. Remove the plugs first, before setting it to the timing marks. |
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1999 Black with custom paint IS   |
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Redline +
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« Reply #11 on: July 30, 2018, 09:26:52 PM » |
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I have remember something, something odd happened when I took the belt off. I got the timing marks lined up, removed the tensioner wheel, and removed the belt. Then Cam wheel then spun, like it was pre-loaded. The wheel spun maybe 20 degrees, and I had to use a lever to spin it back. It happened quick, and was reset quickly so it escaped my mind.
More likely the compression in the cylinder. Remove the plugs first, before setting it to the timing marks. Pressure in a cylinder could possibly cause the crankshaft to move once the belts are removed but not a camshaft. As stated earlier, most likely spring pressure on a cam lobe causing the cam to move. Redline |
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DarkSideR
Member
Posts: 1793
To be good, and to do good, is all we have to do.
Pueblo, Colorado
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« Reply #12 on: August 01, 2018, 11:42:54 AM » |
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The plot thickens.
I was finally able to do a compression test today. Here's the results.
Right Bank (the side making noise)
#1 = 145psi
#3 = 150psi
#5 = 141psi
Left Bank (the side left alone)
#2 = 145psi
#4 = 141psi
#6 = 146psi
All within 10psi of each other.
So that's a positive 100% that I'm NOT dealing with a bent valve?
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2001 Valkyrie Super Tourer VRCC#34410 VRCCDS#0263 |
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knockdolian
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« Reply #13 on: August 01, 2018, 11:50:59 AM » |
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The cam shaft would be set with some valves on that bank open, under pressure. If the belt is taken off and the cam isn’t secured the valves will spring shut causing the cam to move. Check tapers again I’d say.
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