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Author Topic: Frozen engine  (Read 10760 times)

Offline daveson

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Re: Frozen engine
« Reply #25 on: March 21, 2022, 05:17:06 AM »
"... cleaned, replaced some parts... "

Which parts? (and which parts under the air box do you mean)

Could it be the alternator?

With the clutch pulled in, can you turn the camshaft anti clockwise with a spanner? Can you turn it clockwise?
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  • Victoria, Australia
  • Current; '85 K100RT~100,000km; four other bricks. Past; Vulcan 1500, V Star 650, KLX 250(dirt bike) TT250(dirt bike)

Offline redwolfstudio

  • ^ Motobrick Curious
  • Posts: 74
Re: Frozen engine
« Reply #26 on: March 21, 2022, 05:29:37 AM »
I replaced the 3 rubber parts connecting the airbox to throttle assy.
On the alternator I replaced an internal seal after removing the main shaft as well as the rubber bushings on the outer end.
Just tried turning camshaft with clutch pulled in an hardly budge, either directions. In fact my spacer slipped over not catching anymore.
But, for a split second there was a slight movement and a sound of gear, yet am in neutral and wheel spins…
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  • Sweden
  • 1990 K75 RT

Offline daveson

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Re: Frozen engine
« Reply #27 on: March 21, 2022, 05:46:42 AM »
Spacer slipped over...?

Maybe the camshaft will turn with the alternator removed, or the clutch basket, or some other thing you replaced.
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  • Victoria, Australia
  • Current; '85 K100RT~100,000km; four other bricks. Past; Vulcan 1500, V Star 650, KLX 250(dirt bike) TT250(dirt bike)

Offline redwolfstudio

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Re: Frozen engine
« Reply #28 on: March 21, 2022, 05:49:30 AM »
Well I mean I pulled hard to rotate and the spanned just “rolled “ over .
Yes, at this point I am going to remove the alternator and see what happens…
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  • 1990 K75 RT

Offline Laitch

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Re: Frozen engine
« Reply #29 on: March 21, 2022, 08:28:07 AM »
Quote from: redwolfstudio on March 21, 2022, 04:34:10 AM
When turned on I have the neutral light on but also the battery light, despite being a new battery…
The battery light will stay on until the engine operates the alternator to shut it off. It works that way with all Bricks and yours is no exception unless your alternator light never worked or your alternator wasn't charging in the first place.
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  • 1995 K75 89,000 miles

Offline redwolfstudio

  • ^ Motobrick Curious
  • Posts: 74
Re: Frozen engine
« Reply #30 on: March 21, 2022, 08:45:06 AM »
Thank you everyone for all your help and advice!
In my haste to remove the alternator I just stripped the lower bolt’s head…and now it keeps turning into a slower progress…I’ll be back soon 😩🤬
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  • Sweden
  • 1990 K75 RT

Offline redwolfstudio

  • ^ Motobrick Curious
  • Posts: 74
Re: Frozen engine
« Reply #31 on: March 21, 2022, 09:23:44 AM »
Success! After finally removing the alternator I am able to spin the wheel in high gear! spark plugs removed.
So my engine is not seized:-))
I tested my starter motor and it spins but, the alternator am unsure how to test…I bet I screwed up something when I took it apart earlier on…
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  • Sweden
  • 1990 K75 RT

Offline frankenduck

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Re: Frozen engine
« Reply #32 on: March 21, 2022, 09:44:40 AM »
Battery light should be lit until the bike starts running.
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Offline daveson

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Re: Frozen engine
« Reply #33 on: March 21, 2022, 01:57:50 PM »
"~ but for a split second there was a slight movement and the sound of a gear... "

Maybe you pushed a bit too hard. Make sure the timing marks are still good before going much further.
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  • Victoria, Australia
  • Current; '85 K100RT~100,000km; four other bricks. Past; Vulcan 1500, V Star 650, KLX 250(dirt bike) TT250(dirt bike)

Offline redwolfstudio

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  • Posts: 74
Re: Frozen engine
« Reply #34 on: March 21, 2022, 02:05:16 PM »
Thank you!
Forgive my stupid question, how do I keep the timing marks?
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  • Sweden
  • 1990 K75 RT

Offline daveson

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Re: Frozen engine
« Reply #35 on: March 21, 2022, 02:19:09 PM »
It's best described in a workshop manual (available here at motobrick) but the camshaft gears have marks which should be parallel and inline at top dead centre of compression stroke. The crankshaft position will also be shown. 


The alternator test, as with the starter motor, when removed, you should be able to turn it with your fingers.

There's no stupid questions, it's better to ask if not sure.
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  • Victoria, Australia
  • Current; '85 K100RT~100,000km; four other bricks. Past; Vulcan 1500, V Star 650, KLX 250(dirt bike) TT250(dirt bike)

Offline redwolfstudio

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Re: Frozen engine
« Reply #36 on: March 21, 2022, 03:04:27 PM »
Super, I really appreciate:-)
Thank you.
I will resume tomorrow.
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  • Sweden
  • 1990 K75 RT

Offline redwolfstudio

  • ^ Motobrick Curious
  • Posts: 74
Re: Frozen engine
« Reply #37 on: March 22, 2022, 11:00:53 AM »
So upon removing the alternator I hooked up the battery to the lead on bike and the engine turned! What a relief:-)
Now I need to fix the alternator or replace it.
Thanx again for all your support, really appreciate 👏
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  • 1990 K75 RT

Offline The Mighty Gryphon

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Re: Frozen engine
« Reply #38 on: March 22, 2022, 12:17:37 PM »
Can you turn the alternator with your hand?
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline redwolfstudio

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  • Posts: 74
Re: Frozen engine
« Reply #39 on: March 22, 2022, 01:48:25 PM »
Yes it does, easily
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  • 1990 K75 RT

Offline redwolfstudio

  • ^ Motobrick Curious
  • Posts: 74
Re: Frozen engine
« Reply #40 on: March 22, 2022, 04:50:57 PM »
The bike was mostly taken apart by previous owner and then left for 3-4 years. Hard to know what he did…
Although he did say the bike ran but poorly and he suggested possibly on only 2 cylinders. The injectors were all rusty and I have replaced them and cleaned everything.
But now that engine turns I feel better about it.
The alternator is my next project…how to fix it…
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  • Sweden
  • 1990 K75 RT

Offline rbm

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Re: Frozen engine
« Reply #41 on: March 22, 2022, 06:04:42 PM »
I had a problem once where I replaced the 30W K75 alternator with a 50W K1100 one.  Unknown to me, someone had inserted a washer below the drive cup.  Off the bike, both engine and alternator spun freely.  When mated, the alternator pushed on the vane and bound the engine.  After a very short run, a bearing blew in the intermediate housing and I have an expensive teardown to repair the damage.  Maybe the same is happening to you.

This is a link to the discussion thread:  https://www.k100-forum.com/t2332-k100rt-intermediate-gear-repair-thread
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Offline redwolfstudio

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Re: Frozen engine
« Reply #42 on: March 24, 2022, 09:13:42 AM »
So now that I have removed the alternator, the part where the head of the alternator fits, is that something that I should be able to spin by hand? Or is it not doable?
Trying to figure out if the alternator is the guilty party.
Thank you!
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  • Sweden
  • 1990 K75 RT

Offline The Mighty Gryphon

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Re: Frozen engine
« Reply #43 on: March 24, 2022, 09:28:27 AM »
The drive dog cannot be turned by hand because it is linked to the crankshaft.  It should spin when the engine turns.

Does the engine turn over when the starter runs with the alternator off the engine?  If it does, you have done something to the alternator when you "serviced" it.  That is where your problem is.
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline redwolfstudio

  • ^ Motobrick Curious
  • Posts: 74
Re: Frozen engine
« Reply #44 on: March 24, 2022, 09:30:59 AM »
Yes, the engine turns. I was afraid of that but it does look like I caused the alternator to malfunction.
I will restart its overall, again.
Thank you!
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  • Sweden
  • 1990 K75 RT

Offline The Mighty Gryphon

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Re: Frozen engine
« Reply #45 on: March 24, 2022, 12:25:33 PM »
So, to clearly state the problem.

The engine cranks without the alternator, and the alternator turns freely when it is off the engine, but nothing moves when the alternator is installed on the engine.

Is that correct?
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline redwolfstudio

  • ^ Motobrick Curious
  • Posts: 74
Re: Frozen engine
« Reply #46 on: March 24, 2022, 01:14:18 PM »
Yes, that is correct
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  • Sweden
  • 1990 K75 RT

Offline The Mighty Gryphon

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Re: Frozen engine
« Reply #47 on: March 24, 2022, 02:37:50 PM »
The problem is in how you put the drive clutch on the alternator or how you installed the alternator on the engine.  See RBM's post #41 above.
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  • In my garage in Marilla, NY
  • '91K100RS White/Blue
Current:
'91 K100RS16V "Moby Brick Too"

Past:
'94 K75RT "Ilsa, She Wolf of the SS"
'92 K100RS16V "Moby Brick" (RIP, deceased in a vehicular assault)
'94 K75S Special Edition Dakar Yellow "Cheetos"
'89 K100RS Special Edition "Special Ed"

Offline daveson

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  • Posts: 1268
Re: Frozen engine
« Reply #48 on: March 24, 2022, 03:23:50 PM »
Can you see a circular mark at the front of the intermediate housing, pointing to the possibility that the rubber absorber housing thingo was compressed against it while the mounting bolts were tightened? You could measure the clearance required. Maybe you put the spring washer on the wrong side of the absorber housing, or something like that. 
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  • Victoria, Australia
  • Current; '85 K100RT~100,000km; four other bricks. Past; Vulcan 1500, V Star 650, KLX 250(dirt bike) TT250(dirt bike)

Offline redwolfstudio

  • ^ Motobrick Curious
  • Posts: 74
Re: Frozen engine
« Reply #49 on: March 24, 2022, 03:40:28 PM »
Here’s a pic, I don’t see any marks shut that is an interesting point you bring.
Thank you!
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  • Sweden
  • 1990 K75 RT
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