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Old 07-20-2011, 04:16 PM   #1
bristol3261
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Default valve noise / 1500

bike sat for a week. upon startup, a new engine noise that sounded
kinda like valves. Noise went away in 3 or 4 mins. We rode 75 miles
and stopped for a 1/2 hour. Upon startup ticky/tick is back but went away in a couple mins. and we rode home. After sitting for 3 days,
I started bike today, noise was there but DID NOT go away.
Oil is fresh GN-4 10/40 and on the upper mark, filter is fresh OEM Honda. Bike is a 98 SE,new to me 2 years now. Less than 5000
miles on the bike
Noise seems to be on the left side. Using a wooden dowl, it is not coming from alternator. Help Please.
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Old 07-21-2011, 10:35 AM   #2
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It's "possible" that the valves need adjusting and valve adjustments on the 1500 are screw and lock nut method. Intake clearance: 0.15 mm/0.006"; Exhaust 0.22mm/0.009". If the mileage is correct (5000?) it does seem unlikely that the valves should need adjusting, but anythings possible. After 13-14 years I'd be leary of the timing belts as well due to the effect of time and lack of use, not necessarily related to the ticking but you don't want the belts to fail and pile up your entire valve train. Another possibility is improper lubrication of the top end; again, lack of use can do bad things to an engine's internal systems.
Neither valve adjustment or belts are a major undertaking, but I'd start there. As to the lubrication, there could be some sludge blocking a small oil channel or such.
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Old 07-21-2011, 10:49 AM   #3
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Could this be an exhaust leak at the heads? I know that makes that kind of tick~tick sound.
Not to get TOO far off topic, I'm thinking of flushing my oil by adding a half can of sea Foam to the crankcase & running it to operating temps, then changing the oil...a couple of times. I want to use a cheaper oil because it won't be in there long.
Should I be concerned about friction modifiers in regular oil? Should I just stick with the proper oil? It's a new to me '88 1500 & I'm doing all the fluids, cooling system flush,brake fluids, timing belts, a trigger wheel..etc.
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Old 07-21-2011, 12:15 PM   #4
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Quote:
Originally Posted by budoka View Post
It's "possible" that the valves need adjusting and valve adjustments on the 1500 are screw and lock nut method. Intake clearance: 0.15 mm/0.006"; Exhaust 0.22mm/0.009". If the mileage is correct (5000?) it does seem unlikely that the valves should need adjusting, but anythings possible. After 13-14 years I'd be leary of the timing belts as well due to the effect of time and lack of use, not necessarily related to the ticking but you don't want the belts to fail and pile up your entire valve train. Another possibility is improper lubrication of the top end; again, lack of use can do bad things to an engine's internal systems.
Neither valve adjustment or belts are a major undertaking, but I'd start there. As to the lubrication, there could be some sludge blocking a small oil channel or such.
you sure about that? i thought gl 1100's had screw and locknut valve adjustment and 1500 wings were hydraluic
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Old 07-21-2011, 12:35 PM   #5
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I'm just looking in my Honda '88 service manual that I got 4 days ago..printed in April 1988, it says the hydraulic valve adjuster shim selection;
Shim the hydraulic valve adjusters when any of the following parts are replaced:
cylinder head/camshaft holder
camshaft
valve/valve seat (refaced)
rocker arm/rocker arm shaft
So, I would say hydraulic is what they are. Unless they were changed in later years.
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Old 07-21-2011, 01:15 PM   #6
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Maintenance schedule GL1500 shows valve clearance inspection every 12,000 miles or 20,000km.
Section 3 (maintenance) page 7+. Adjustments are screw and locknut; adjustment screw on the top of the valve assembly and the lock nut is just below it. Same as earlier models, the piston must be at TDC and then you insert the guage between the stem and the adjustiong screw. To adjust, loosen the locknut and then turn the adjusting screw until there is just a slight drag on the feeler guage. Tighten the locknut to specified torque (17 ft/lb) and move on to the next specified cylinder and so on until done.
As far as I can remember, the 1200 was the only engines that were hydraulically adjusted (no hands on adjusting).
Specs I quoted are out of the '97-'99 model GL1500 service manual since it is a '98 SE mentioned.
GL1200 engines/maintenance sections show no valve adjustment or maintenance requirements in the service manual.
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Old 07-21-2011, 01:32 PM   #7
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I guess there was a change at some point, my manual shows no lock or screw..says hydraulic adjusters; This is interesting, Now I'm curious as to when there was a change?
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Old 07-21-2011, 04:26 PM   #8
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This is interesting, I pulled my 1997 GL1500 Honda Factory service manual and the Clymer and Clymer mentions 4 different hydraulic tappet shim sizes for 1998 to 2000, this is used when you change the cam shafts or other valve train components. My 97 Honda manual makes no mention of valve adjustments at 12,000 miles.
Will scan the pages and post them.
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Old 07-21-2011, 05:04 PM   #9
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actually the 1200 wings valves can be adjusted too, it takes the excess slack out the lifter and thanks for the info on the 1500 wing
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Old 07-21-2011, 05:43 PM   #10
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I have scanned the pages from the factory manual and they make no mention of an adjustment @ 12,000 miles. But they do show the hydraulic tappets and a shim change when valve train components are replaced.
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