Author Topic: Phoenix Rising - '93 K75RT Fire Recovery  (Read 4777 times)

Offline brichbk

  • ^ Motobrick Curious
  • Posts: 103
Re: Phoenix Rising - '93 K75RT Fire Recovery
« Reply #100 on: December 14, 2018, 02:27:48 PM »
Looking for a little confirmation about how to install the timing chain and camshafts to make sure they line up properly.  I've been using my chlymers manual and the instructions on this page (http://www.bmw-k100rt-page.eu/manual/Engine/ReassemblingEngine_32.htm) to do the reinstalls but I'm just a little unsure.  Based on the video below it shows I have to install the cams with the #3 lobe pointed away from the valve and after all the journals are installed then I rotate the camshaft so that the sprocket cut out aligns properly with the head.  Then to install the chain I need to loosen the sprocket so that there is "wiggle room" to get the chain on.

start at 4:40

  • Central Valley California
  • 1993 BMW K75RT // 1982 Honda Nighthawk 650sc

Offline brichbk

  • ^ Motobrick Curious
  • Posts: 103
Re: Phoenix Rising - '93 K75RT Fire Recovery
« Reply #101 on: December 15, 2018, 09:29:52 PM »
Had a very productive day.  Got my engine put back together, radiator and new fan installed and wired up, the throttle body installed, throttle and throttle advance cables adjusted, airbox installed, spark plugs and wires, new oil & coolant.  All that is left is to hook up the gas tank, battery and EFI, and to double check my clutch cable.  Those last few will have to wait until tomorrow.
  • Central Valley California
  • 1993 BMW K75RT // 1982 Honda Nighthawk 650sc

Offline John Lang

  • ^ Proficient Motobricker
  • Posts: 133
  • John Lang
Re: Phoenix Rising - '93 K75RT Fire Recovery
« Reply #102 on: December 16, 2018, 07:11:51 AM »
As has been suggested, could the ring terminals on your mystery wires attach to the ground point on the central tube of the frame under the tank? See #9 on p.2 of 'Bert's Bible' as per the link in johnny's post: http://www.motobrick.com/index.php/topic,5067.msg31282.html#msg31282

You do not say where the invisible ends of the wires in your photo lead to. Were the ring terminals we can see attached to the battery to power a USB power plug or similar?
  • Ottawa, ON Canada
  • 1987 K75C

Offline brichbk

  • ^ Motobrick Curious
  • Posts: 103
Re: Phoenix Rising - '93 K75RT Fire Recovery
« Reply #103 on: December 17, 2018, 03:37:39 PM »
Good News!  The bike starts and runs.  I have compression on all three cylinders (1-145, 2-150, 3-145) before the valve job I only had 8psi on #3.  The throttle response is much better than it was before.  I have an air leak at the TB boots so I'm pulling the TB boot and reinstalling them with some gasket sealer to seal up the leak.  I had a heck of a time getting the TB clamps oriented correctly the first time so they didn't interfere with the throttle linkage.  But a quick search and this thread came up to help me out, http://www.motobrick.com/index.php/topic,10235.msg87216.html#msg87216.  I should be able to get the Throttle body put back together later today then I'll need to balance the TB and I will be good to go.
  • Central Valley California
  • 1993 BMW K75RT // 1982 Honda Nighthawk 650sc

Offline The Mighty Gryphon

  • ^ Quintessential Motobricker
  • Posts: 4118
Re: Phoenix Rising - '93 K75RT Fire Recovery
« Reply #104 on: December 17, 2018, 04:24:30 PM »
 :yippee: :yippee: :clap: :yippee:

        :clap:

          :clap:     :yippee:
  • In my garage in Marilla, NY
  • '94 K75RT Mystic Red, '92K100RS White, '94 K75S Dakar Yellow
Current:
'94 K75RT "Ilsa, She Wolf of the SS"
'94 K75S "Cheetos"
'91 K100RS "Moby Brick Too

Offline brichbk

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  • Posts: 103
Re: Phoenix Rising - '93 K75RT Fire Recovery
« Reply #105 on: December 18, 2018, 10:36:56 AM »
Reinstalled the throttle body and tested for air leaks, no air leaks!  So I took the bike for a 10 mile ride last night and it ran great.  I still have a couple of minor tweaks but for the most part, the bike is done.  Thank you to all of you who have helped me get this K bike back on the road.  Thank you for enduring my mistakes, questions, and doubts.  I've learned a lot and I appreciate each and every one of you.

I am excited to say, "the Phoenix has risen and taken flight".
  • Central Valley California
  • 1993 BMW K75RT // 1982 Honda Nighthawk 650sc

Offline brichbk

  • ^ Motobrick Curious
  • Posts: 103
Re: Phoenix Rising - '93 K75RT Fire Recovery
« Reply #106 on: January 23, 2019, 04:30:31 PM »
I think my head gasket might be leaking coolant into my engine oil.  It's been about 200 miles since I got the bike running again.  Here's what I noticed and what I've done about it so far.

I first started noticing white smoke out of the exhaust when I first started the bike but after it was warmed up the smoke would stop.  I store the bike on the center stand in the garage overnight.

So, I started watching the oil level.  I didn't really notice anything until this week.  The bike has sat in the garage on the center stand for the past 8 days or so.  When I went out the other day I was looking the bike over and noticed that my oil sight glass showed that the oil level was above the 3/4 mark.  When I added oil I made sure it only went to halfway up the sight glass.  The week or two after the bike was running I checked the oil level and it was always about halfway up the sight glass.  I put Mobile1 20w50 in the engine after the cylinder head repair.

Today I decided to drain the oil to see what it looked like.  The oil has only been in the engine for about 200 miles.





It looks murky and kind of an olive greenish brown color.

I drained the coolant and it looks clean and it was pretty full.  Before I drained the coolant I opened the fill cap and could see coolant in the system.  I have also noticed that my coolant reservoir is at about !/4 full when it was just over half when I first added coolant after the repair work.

What do you think, does it look like coolant is getting in the engine oil?
I was reading up on some posts and one post suggested removing the oil pan, putting coolant in the radiator and seeing if it comes out through the crankcase.  This was to see if the engine block was cracked.  I don't think that is the case, but I'm willing to try this if it is necessary.
What other things should I check if the head gasket is leaking?

Note:  when I reinstalled the cylinder head I torqued everything to spec and did the two-stage torque that the manual calls for and cleaned the mating surfaces (but perhaps I didn't clean them good enough).

  • Central Valley California
  • 1993 BMW K75RT // 1982 Honda Nighthawk 650sc

Online daveson

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  • Posts: 87
Re: Phoenix Rising - '93 K75RT Fire Recovery
« Reply #107 on: January 23, 2019, 09:29:57 PM »
Often recent work is the cause of a problem.
If your lucky it might be a simple problem.

Could be a leaky seal between oil and water pump.

Could be a loose head bolt. If any bolts are loose shortly after they have been tightened,  they are probably stretched and weakened, you can measure the length,  a stretched bolt may be just 0.2 mm longer. I have to admit I didn't read all posts in this problem.
  • victoria australia
  • current; 1986 bmw k100rt, '88 k100rt, '91 k100rt, '92 k75s '96 kawasaki vulcan 1500 Past;v star 650, kawasaki klx250, yamaha tt250

Online daveson

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Re: Phoenix Rising - '93 K75RT Fire Recovery
« Reply #108 on: January 23, 2019, 11:40:04 PM »
After refilling coolant there can sometimes be a certain amount of self bleeding, lowering the coolant level,  but that would have happened before 200 miles. If the coolant level dropped at the same time as the oil level raised, it's not looking good.

If a head bolt is loose,  tighten it, if it becomes  loose again replace it, and the others related to that cam.
  • victoria australia
  • current; 1986 bmw k100rt, '88 k100rt, '91 k100rt, '92 k75s '96 kawasaki vulcan 1500 Past;v star 650, kawasaki klx250, yamaha tt250

Online daveson

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Re: Phoenix Rising - '93 K75RT Fire Recovery
« Reply #109 on: January 23, 2019, 11:45:41 PM »
It is a good sign that it seemed to be good for 200 miles and that you are monitoring it closely.
  • victoria australia
  • current; 1986 bmw k100rt, '88 k100rt, '91 k100rt, '92 k75s '96 kawasaki vulcan 1500 Past;v star 650, kawasaki klx250, yamaha tt250

Online daveson

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Re: Phoenix Rising - '93 K75RT Fire Recovery
« Reply #110 on: Today at 12:03:01 AM »
Are there bubbles in the coolant, oil in the coolant or condensation in the exhaust the same colour as your coolant?
  • victoria australia
  • current; 1986 bmw k100rt, '88 k100rt, '91 k100rt, '92 k75s '96 kawasaki vulcan 1500 Past;v star 650, kawasaki klx250, yamaha tt250

Online Martin

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Re: Phoenix Rising - '93 K75RT Fire Recovery
« Reply #111 on: Today at 12:23:06 AM »
 Do a compression test and compare the cylinders. The condition and colour of the spark plug may also show signs.
Regards Martin
  • North Lakes Queensland Australia
  • 1992 K75s Hybrid, Lefaux, Vespa V twin.

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