BMW K bikes (Bricks)

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1Back to top Go down   Engine, left side ticking noise. Empty Engine, left side ticking noise. on Sat Jul 21, 2012 8:14 pm

Rabidchiwawa007

Rabidchiwawa007
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Hi again, second post here!

So the bike is a 1985 K100RS that I've had for a few months now. This ticking sound from the left side of ye engine has been happening since I first bought the bike. I changed the oil about 1000mi ago and put 20w-50 regular motor oil in it. I realize that's on the thicker side for this bike, but it didn't make any difference in the noise.

Now, I believe this noise is a lifter. And since I -think- it's only one of them, based on the speed of the tick, I dont believe it's an oiling problem, because if that were the case, I would assume all of them would be ticking.

I suppose my questions are: is my assumption correct that it is a lifter?
Are these things adjustable on the 1985 k100?
And if it needs a replacement, an approximation of price of parts (and labor if I decide to take it in)
And would an oil additive and a couple oil changes even be worth trying?

Thanks all!

    

2Back to top Go down   Engine, left side ticking noise. Empty Re: Engine, left side ticking noise. on Sat Jul 21, 2012 9:15 pm

RicK G

RicK G
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The K bikes don't have "lifters" in the general term of Hydraulic lifters like auto engines.
They have the cam working almost directly on the top of the valve stem with a follower and a shim for adjustment.
If you remove the cam cover on the left side you can then very easily measure the valve clearance using a set of feeler gauges.
I would suggest downloading the clymer or haynes or OEM manual from the downloads section (you need a password from Crazy Frog to do this) and those manuals will give you a good run through on how to do the job including changing the shims if needed.

The ticking could also be an injector clicking.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

3Back to top Go down   Engine, left side ticking noise. Empty Re: Engine, left side ticking noise. on Sat Jul 21, 2012 10:28 pm

Rabidchiwawa007

Rabidchiwawa007
Platinum member
Platinum member
So essentially, it could be a valve adjustment (the shim) that could just be a little high on clearance that could be ticking and I would just have to check that out? Is it possible that it's worn and is ticking due to that?

I've heard that about injectors as well, that they will sometimes tick. The ticking increases speed in conjunction with RPMs, if that tells you anything helpful. If it was an injector, I would have no idea where to begin as I've only worked with my 1968 BSA before. Is an injector ticking a detrimental thing?

    

4Back to top Go down   Engine, left side ticking noise. Empty Re: Engine, left side ticking noise. on Sat Jul 21, 2012 11:05 pm

Avenger GT

Avenger GT
Life time member
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You can use a screwdriver as a stethoscope to check where the noise is coming from. Work along the cam covers over the valves, and if one of them is noisy you will be able to pinpoint it.

    

5Back to top Go down   Engine, left side ticking noise. Empty Engine, left side ticking noise. on Sat Jul 21, 2012 11:29 pm

RT

RT
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Life time member
Put the pointy end on the engine


__________________________________________________
2011 R1200RT
    

6Back to top Go down   Engine, left side ticking noise. Empty Re: Engine, left side ticking noise. on Sun Jul 22, 2012 2:26 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Some would say that it's "better to hear the valves ticking that to not". But these valves don't do a lot of ticking. If it's loose it's a too-wide clearance issue and can be shimmed to the proper clearance as per Rick's suggestion, with the proper tools and a reasonable understanding of the correct procedure, as well as the useful info available from the downloadable manuals here.

The shims don't wear much, per se, it's the valve seat or valve face itself that wears, usually leading to an excessive tightness of clearance. If the tickover (idle) is steady and smooth and the revs increase without obvious strain then that's an indicator that the valves are likely within or close to spec.

A ticking injector is of no particularly big drama unless she runs like sh*te.

20W50 oil is a good viscosity for the mighty K in a Summer climate.


__________________________________________________

"It is a capital mistake to theorize before one has data. Insensibly one begins to twist facts to suit theories, instead of theories to suit facts."

Arthur Conan Doyle
1970 R60/5, '77 R75/7-R100, '85 K100'87 K75C, '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-Polizia  - all of the Beemers in my life I can recall, owned still or sold on.
    

7Back to top Go down   Engine, left side ticking noise. Empty Re: Engine, left side ticking noise. on Tue Aug 14, 2012 1:39 am

Rabidchiwawa007

Rabidchiwawa007
Platinum member
Platinum member
So I finally got around to stethoscoping the engine, and I actually couldn't hear any ticking noise when through the screw driver when placing it on the valve cover over each piston. I DID hear a ticking when I placed the screw driver on each injector. So I'm assuming it's just one or more injectors ticking, which is no biggie as far as i know.

Thanks everyone!


__________________________________________________
1968 BSA Lightning
1991 BMW K100RS 16v with K1100LT fairing
    

8Back to top Go down   Engine, left side ticking noise. Empty Re: Engine, left side ticking noise. on Tue Aug 14, 2012 2:16 am

RicK G

RicK G
VIP
VIP
The injectors are always ticking it's when they stop you got problems.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

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