Valve Adjustment & Plugs - Pictures too.


Information and questions on GL1100 Goldwings (1980-1983)
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Wingsconsin
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Valve Adjustment & Plugs - Pictures too.

Postby Wingsconsin » Sat Sep 22, 2012 5:06 pm



Toady I adjusted the valve clearences on the 1980 GL1100 Interstate.
I doubt it had been done for a LONG time as it was quite difficult to get the covers off ..I had to loosen the crash bars but eventually got to it...

Checking and double checking the TDC on T1 I was certain I had it right..
To my amazement all the tappets were TIGHT - so tight I could not get a feeler under them...so I set about re-setting them all correctly.
When I was done I took the bike out for a ride and it seemed to run better (placebo effect?) and was definietly more quiet !

My question is -- what effect does over tight tappets have on the engine...What happens..?

Second issue...
While I was doing the valve adjustment I also removed the plugs that now have about 2500 miles on them to get an idea of state of tune on the engine (which I know I changed by doing the valves)
Here is what I found -






It seems the tips were actually a nice beige color but more of the plug was dark than I thought should be..
There is anti-seize on the threads so it is supposed to be that copperish color...



Postings are my opinions based on experience and acquired knowledge.
Your results may vary. Universal disclaimers apply.


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Johnyy Smoke
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Re: Valve Adjustment & Plugs - Pictures too.

Postby Johnyy Smoke » Sat Sep 22, 2012 5:37 pm

I would'nt worry about the tight tappets,if it runs ok-and does'nt smoke alot.Once you have them properly adjusted-it should be ok.
The plugs look pretty much o.k. to me. Ride and enjoy. regards,Johnyy

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SteveB123
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Re: Valve Adjustment & Plugs - Pictures too.

Postby SteveB123 » Sun Sep 23, 2012 1:31 pm

Tight exhaust tappets will burn the valve, as it won't fully close and contact the head to disipate heat.
Current:82 GL1100 Interstate, 60 Amp Poorboy, MSD coil
Previous: 93 GSX1100F Katana
82 GL500 Silverwing

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Wingsconsin
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Re: Valve Adjustment & Plugs - Pictures too.

Postby Wingsconsin » Mon Sep 24, 2012 8:49 am

SteveB123 wrote:Tight exhaust tappets will burn the valve, as it won't fully close and contact the head to disipate heat.


It is now corrected, and I don't believe there is any real damage howeer I have no idea how laong they were like this..a while I suspect as the general state of maintenance was a bit low when we got the bike, ...What might I expect from properly adjusted valves now compared to before..?

Already the bike seems to run better...I hope to get a bit better fuel economy too..the avg before was about 33 to 35 MPG city commuting...
Postings are my opinions based on experience and acquired knowledge.
Your results may vary. Universal disclaimers apply.


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thrasherg
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Re: Valve Adjustment & Plugs - Pictures too.

Postby thrasherg » Mon Sep 24, 2012 11:20 am

As stated, tight tappets, will prevent the valves from closing correctly, causing the valve seats (In the head and on the valves) to burn, it will also reduce compression in the cylinder leading to a loss of performance. This will cause you to use more throttle to compensate for the loss of performance and that will cause you to use more gas (Lower MPG numbers). I would run the engine for a while now that you have the valves gapped correctly, and would then run a compression test in a 1000 miles just to make sure there wasn't any real damage done to the valve seats or the cylinder head seats.. Your plugs would indicate that there is NOTHING wrong with your mixture, they look a nice healthy color..

Gary

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Wingsconsin
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Re: Valve Adjustment & Plugs - Pictures too.

Postby Wingsconsin » Mon Sep 24, 2012 11:50 am

Gary (and others)
Thanks for the information...I think the bike is coming around nicely now...
It is my 19 years old sons bike and I want to be certain it can get him home when he needs too...
One good reason to get him on a Goldwing rather than a crotch rocket.... :mrgreen:
Postings are my opinions based on experience and acquired knowledge.
Your results may vary. Universal disclaimers apply.


Motorcycle Adventure Storys writen by me
http://neverlost-justexploring.blogspot.com/

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scotterichmond
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Re: Valve Adjustment & Plugs - Pictures too.

Postby scotterichmond » Tue Sep 25, 2012 8:39 am

I think you will be fine now. plug look just like I would expect. the effect on tight tappets can be two fold.
1- can burn valves if too tight for too long.( your ok I think)
2-it does change the valve timing (some).(early valve timing)
also it will open the valve wider and for a longer period (more air,more compression)
and could cause pinging/detination.

all that being said, it is very small effects , but it does affect things.




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