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Author Topic: Sound advice please!  (Read 1817 times)

Offline quadracer351

  • Posts: 516
Re: Sound advice please!
« Reply #15 on: Jun 19, 2017, 14:06:34 »
Tapping with the plug out


No tapping plug in


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Offline irk miller

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Re: Sound advice please!
« Reply #16 on: Jun 19, 2017, 14:32:11 »
Are the valves seated in their retainers at the top of the spring?  I'd take the tappets completely out on those two valves and look for something loose.  It still sounds like the tappets are clicking on top of the valve. 

Offline Kamn

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Re: Sound advice please!
« Reply #17 on: Jun 19, 2017, 15:49:38 »
I can still hear it in the second video where you say "no tapping with plug in"
It definitely sounds like its coming from valve train........take it apart.
Who put this motor together?
« Last Edit: Jun 19, 2017, 15:55:57 by Kamn »
'82 Kawi GPZ550
'79 CX500 Cafe/Brat (in progress build)(took a break from it to.......)
'81 CX500 Custom (almost done)
'73 CB750 K3 (needs restoration)

Offline Kamn

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Re: Sound advice please!
« Reply #18 on: Jun 19, 2017, 15:53:16 »
Can you get a wrench on the crank bolt (with plugs removed) and rotate slowly until click happens then roll back a little and forward on the part of the cycle its happening at.....you will be able to pinpoint better.
Also, maybe have a friend do the rotating of the motor while you have a stethoscope on it
Id also drop the oil out and inspect for any metaly bits
'82 Kawi GPZ550
'79 CX500 Cafe/Brat (in progress build)(took a break from it to.......)
'81 CX500 Custom (almost done)
'73 CB750 K3 (needs restoration)

Offline quadracer351

  • Posts: 516
Re: Sound advice please!
« Reply #19 on: Jun 19, 2017, 16:09:48 »
I can still hear it in the second video where you say "no tapping with plug in"
It definitely sounds like its coming from valve train........take it apart.
Who put this motor together?
Works Engineering in Brooklyn. Photo of what was found during rebuild and what was done

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Offline Kamn

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Re: Sound advice please!
« Reply #20 on: Jun 19, 2017, 16:14:26 »
looks like its past warranty (date on invoice is from 2014 or at least what I can see)
was this motor run before? Or is this the first time you have run it?
If they are in your area, you may want to go back with it......just a thought
Any decent mechanic would square this up for you if it hasn't been run before now
« Last Edit: Jun 19, 2017, 16:19:15 by Kamn »
'82 Kawi GPZ550
'79 CX500 Cafe/Brat (in progress build)(took a break from it to.......)
'81 CX500 Custom (almost done)
'73 CB750 K3 (needs restoration)

Offline quadracer351

  • Posts: 516
Re: Sound advice please!
« Reply #21 on: Jun 19, 2017, 16:34:03 »
Motor was ran for the first time since the rebuild last week which is immediately when I heard the tapping. Work was done awhile ago but was never turned over till and the work was completed on it in 2016 not 14  told them to hold onto it to keep it out of my garage while I worked on other things here. I'm starting to get nervous that the problem is further down in the motor since I'm not able to pin point what it is on top

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« Last Edit: Jun 19, 2017, 16:41:20 by quadracer351 »

Offline Kamn

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Re: Sound advice please!
« Reply #22 on: Jun 19, 2017, 16:43:09 »
My advice to you would be to bring it back and let them solve it.
If I as mech did something wrong and then the owner tried to correct it, I wash my hands of it because I don't know who actually messed up
BUT if client brings back without touching it, its all my responsibility to see that its corrected and customer is happy. It happens to all of us that we mess up every now and then for whatever reason, I just like having the chance to correct the problem and also learning what i made a mistake on and why....or it was failed part

If you wish to tear into it, then start by removing the tappet in #4 exhaust + other suggestions of stethoscope to pinpoint location of noise
'82 Kawi GPZ550
'79 CX500 Cafe/Brat (in progress build)(took a break from it to.......)
'81 CX500 Custom (almost done)
'73 CB750 K3 (needs restoration)

Offline quadracer351

  • Posts: 516
Re: Sound advice please!
« Reply #23 on: Jun 19, 2017, 17:12:30 »
My advice to you would be to bring it back and let them solve it.
If I as mech did something wrong and then the owner tried to correct it, I wash my hands of it because I don't know who actually messed up
BUT if client brings back without touching it, its all my responsibility to see that its corrected and customer is happy. It happens to all of us that we mess up every now and then for whatever reason, I just like having the chance to correct the problem and also learning what i made a mistake on and why....or it was failed part

If you wish to tear into it, then start by removing the tappet in #4 exhaust + other suggestions of stethoscope to pinpoint location of noise
Agreed just sent them an email trying to see if they'll pick it up tomorrow

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Offline Kamn

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Re: Sound advice please!
« Reply #25 on: Jun 19, 2017, 17:32:31 »
was thinking the same thing as well
'82 Kawi GPZ550
'79 CX500 Cafe/Brat (in progress build)(took a break from it to.......)
'81 CX500 Custom (almost done)
'73 CB750 K3 (needs restoration)

Offline quadracer351

  • Posts: 516
Re: Sound advice please!
« Reply #26 on: Jun 19, 2017, 17:36:07 »
At all possible to get the valve cover off while in the frame? Not about to pull the motor if there going to come get the bike and want to have it running too see what I'm talking about

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Offline quadracer351

  • Posts: 516
Re: Sound advice please!
« Reply #28 on: Jun 19, 2017, 20:06:36 »
Worst case scenario??

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Offline irk miller

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Re: Sound advice please!
« Reply #29 on: Jun 19, 2017, 20:16:32 »
Worst case scenario, the shop effed up your head and stretched those holes trying to swap valve guides.  Your supposed to heat up the head, which opens up the holes enough to help the guides go in easier.  Typically, the replacement valve guides are slightly larger on the OD to insure a tight fit.  We don't know anything until you find exactly what's making that noise. If you look at the valve guides in the pic, they have a machined ring in the center of the valve.  I suspect they may be lifting in the head from the spring pressure and when the cam rotates the tappet is pushing it back into the head and making that clicking sound when the ring hits the head.  I agree with Kamn that you need another person to turn the motor so you can get in there and see what's going on.