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Author Topic: Blown motor NOW I"VE DONE IT  (Read 4023 times)

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ElCheapo

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Blown motor NOW I"VE DONE IT
« on: November 09, 2005, 05:57:36 PM »
Damn Damn Damn. I went for a quick ride today. I think it was 15 miles one way. When I was on my way back I hit third gear and  :o :o :o SCHREEEEEEEEEEEEEEECH d >:( >:( >:( Deep and low in the motor. And then clunk lunk..... coasting... nothing. I hit the starter and nothing moves. I flip out the kick starter and go to give her a kick and with quite a bit of force she comes loose and starts. It runs for about 10 seconds with no noise, no oil light then dead again just before it lets out the death schreech again. :'(
As of right now the motor still turns but sound like someone dumped thier spare bolts can in the crankcase. With any luck at all I will only have to hang new rods and a crank in it. Start it again and it will be a grenade.

Fortunately I have two parts bikes, both Super Sports. I had no plans of putting a super sport motor in my K but it appears that I have no other choice. With any luck I will have it running again this weekend. I have to say I like the idea of just a little higher redline. I cant help but think this has something to do 40K on the motor and a sprint in the redline area for about 8-10 seconds last week to fend off a stupid van fading in my lane as I kicked the damn door. I really wound her up tight ::).
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Offline MRieck

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Re: Blown motor NOW I"VE DONE IT
« Reply #1 on: November 09, 2005, 06:30:08 PM »
8 to 10 at redline for 10 to15 seconds isn't going to do it. Even low oil won't as it's dry sump. Oil pump went bad or something. I hope you're not talking about those late F engines in regard to replacement.
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Offline Terry in Australia

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Re: Blown motor NOW I"VE DONE IT
« Reply #2 on: November 09, 2005, 06:59:32 PM »
Is this a timely juncture to advertise my patented oil pressure gauges? Only $75.00 to your door, and it'll save you from blowing up your engine! Oh wait a minute, you already have? Hmmnn, what about a nice oil pressure gauge for your replacement engine? Only $75.00 to your door Cheapy, and you'll never blow it up again, ha ha! Cheers, "Mercenary" Terry. ;D
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Offline Steve F

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Re: Blown motor NOW I"VE DONE IT
« Reply #3 on: November 09, 2005, 07:53:29 PM »
Quote from: Terry in Australia on November 09, 2005, 06:59:32 PM
Is this a timely juncture to advertise my patented oil pressure gauges? Only $75.00 to your door, and it'll save you from blowing up your engine! Oh wait a minute, you already have? Hmmnn, what about a nice oil pressure gauge for your replacement engine? Only $75.00 to your door Cheapy, and you'll never blow it up again, ha ha! Cheers, "Mercenary" Terry. ;D
I have an oil pressure gauge too, but that won't prevent the engine from blowing up, unless of course you're watching it all of the time.  :-\
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Offline mick750F

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Re: Blown motor NOW I"VE DONE IT
« Reply #4 on: November 09, 2005, 08:55:26 PM »
Quote from: Terry in Australia on November 09, 2005, 06:59:32 PM
Is this a timely juncture to advertise my patented oil pressure gauges? Only $75.00 to your door, and it'll save you from blowing up your engine! Oh wait a minute, you already have? Hmmnn, what about a nice oil pressure gauge for your replacement engine? Only $75.00 to your door Cheapy, and you'll never blow it up again, ha ha! Cheers, "Mercenary" Terry. ;D

   Damn Terry, ElCheapo just blew his mill and you're making a sales pitch?!?! Running low on the ol' Jack Daniels? ;D ;D ;D

Mike
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ElCheapo

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Re: Blown motor NOW I"VE DONE IT
« Reply #5 on: November 09, 2005, 09:22:21 PM »
The SS motors that I have are a 76 and 77. The 77 is in better condition. The kickstarter on the 76 is jammed but the rest is ok. I will set up replacment motor with an oil pressure gauge and an adjustable low oil pressure ignition kill. Easy to hide and works real well. Simple oil pressure drops below a certain pressure it kills the ignition pronto. This also works in reverse. No oil pressure when starting? It won't start. This system has been in use in race cars for years and takes very little expertise in the electrical world to make one with basic radio shack components.

I don't know what the hell I did to kill it. Oil pump had to die on it. It was running great earlier and then clink, clunk O....
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Offline Terry in Australia

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Re: Blown motor NOW I"VE DONE IT
« Reply #6 on: November 10, 2005, 05:33:45 AM »
Quote from: Steve F on November 09, 2005, 07:53:29 PM
I have an oil pressure gauge too, but that won't prevent the engine from blowing up, unless of course you're watching it all of the time.  :-\

Well that's true Steve, just like your brakes won't stop you from running up the ass of the car in front of you if you don't apply them, or your speedo won't stop you getting booked if you don't look at it, you won't be able to see behind you if you don't check your mirrors, etc etc. Sorry mate, what was your point again? ha ha, cheers, Terry. ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline SCJIM

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Re: Blown motor NOW I"VE DONE IT
« Reply #7 on: November 10, 2005, 05:49:21 AM »
i just gotta ask...

when you do break open the engine could you share this nightmare with us by snapping a fiew pics?
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ElCheapo

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Re: Blown motor NOW I"VE DONE IT
« Reply #8 on: November 10, 2005, 07:24:22 AM »
I will share the pics of the tear down in about a week. For reference I checked oil pressure and it is in spec even with all the noise and the oil light never even flickered during the engine failure. I have seen several times that a rod bearing spins and lines up just right so the oil holes still allow oil pressure. Remember this motor has 44,000 on it. No one has ever been in it.

So oil pump is ok. My guess is that a tiny piece of oil hose came loose and jammed itself into a galley starving key parts of oil.

An oil pressure gauge would have done absolutely nothing as it would have continued to read the correct oil pressure.

Anyone got a few pieces of bread for Terry's foot? ;D Relish is always nice. LOL just kidding Terry..........

I almost have the snotter SS motor out. Just have to pull the bottom mount bolt and oil lines and away we go. Then it's time to get the beast off the trailer and get the motor out of it.
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Offline GoatBaSS

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Re: Blown motor NOW I"VE DONE IT
« Reply #9 on: November 10, 2005, 10:29:58 AM »
Are you using the innards for the old engine? Or are you trying to swap engines as in F eng in K bike? I think you run in to a sprocket offset issue as well as a mounting issue. I have been told that the sprocket will eat chains. Just a heads up. Sorry about your loss. Let me know about the viewing and where to send flowers.
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ElCheapo

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Re: Blown motor NOW I"VE DONE IT
« Reply #10 on: November 10, 2005, 10:53:09 AM »
Just doing a straight swap at this time.
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Offline clarkjh

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Re: Blown motor NOW I"VE DONE IT
« Reply #11 on: November 10, 2005, 10:59:27 AM »
Sorry to hear you lost you plant.  Hope you up and running again soon.

Terry, your oil gage, will it fit a 74 550K?  I don't trust my idiot light.

James
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Offline Terry in Australia

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Re: Blown motor NOW I"VE DONE IT
« Reply #12 on: November 10, 2005, 04:26:14 PM »
Quote from: ElCheapo on November 10, 2005, 07:24:22 AM

Anyone got a few pieces of bread for Terry's foot? ;D Relish is always nice. LOL just kidding Terry..........


Ha ha, fair enough mate, most of the CB750 engine failures I've seen were caused by either oil pump failure or blocked oil jets in the cylinder head, or of course dropped camchains causing bent valves/pushrods etc.

As your original post hinted at a lubrication problem, I assumed it'd be a more common oil failure, than a piece of hose stuck somewhere, I've never heard of that one?

44000 miles is not unusually high for a CB750, a mate of mine bought his K2 new in 1972, and has "lapped" the odometer, without ever pulling the engine, but he is fastidious with oil and filter changes, and regular maintenance.

Sean Condon emailed me recently to say that even though his oil light is still "working", his oil pressure gauge is indicating a big drop in oil pressure, indicating that his pump is dying, so he's happy that the gauge has saved his engine on this occasion, it'd be a tragedy to destroy a fresh 836CC engine, topped with one of Mike Rieck's beautiful heads and a new Megacycle cam!

Anyway, I'm off to buy a bag of bread rolls, and some Vegemite to cover the smell.............. Cheers, Terry. ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

ElCheapo

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Re: Blown motor NOW I"VE DONE IT
« Reply #13 on: November 10, 2005, 05:27:39 PM »
It's all good Terry. ;D I respect your input as you have forgotten more than I know right now. I just made a killer score tonoght. I bought an 84 Honda Sabre for $50. Looks a bit like #$%*e but it runs ok. I think I will calm down on the motor swap pace on the old 750 and ride the Sabre a bit. I have not looked at it too much. Most of it is there. The turn signals are busted but who cares, a dangling turn signal works as good as a mounted one. ;D
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Offline Terry in Australia

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Re: Blown motor NOW I"VE DONE IT
« Reply #14 on: November 10, 2005, 06:03:55 PM »
Quote from: ElCheapo on November 10, 2005, 05:27:39 PM
The turn signals are busted but who cares, a dangling turn signal works as good as a mounted one. ;D

And it's omni-directional! Fifty bucks for a running bike? Bloody incredible mate, talk about "Land of the Free", I'm filling out the immigration forms as I type this, ha ha! Whassa Honda sabre? Is that Honda taking the piss out of Suzuki's Katana? Is it a four? Cheers, Terry. ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline MRieck

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Re: Blown motor NOW I"VE DONE IT
« Reply #15 on: November 10, 2005, 06:15:05 PM »
Quote from: Terry in Australia on November 10, 2005, 05:33:45 AM
Quote from: Steve F on November 09, 2005, 07:53:29 PM
I have an oil pressure gauge too, but that won't prevent the engine from blowing up, unless of course you're watching it all of the time.  :-\

Well that's true Steve, just like your brakes won't stop you from running up the ass of the car in front of you if you don't apply them
That's funny #$%*....sorry guys. Cheapo...if I can help in any way.
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ElCheapo

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Re: Blown motor NOW I"VE DONE IT
« Reply #16 on: November 10, 2005, 07:32:25 PM »
You might say all that. It a 700 V-four liquid cooled. Like a intereceptor in different clothing. I know I never want to do the carb work on it. Holy FREAKIN COW man talk about jammed in there. No place to even spray the old carb spray in!!  ::)
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Offline 6adan

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Re: Blown motor NOW I"VE DONE IT
« Reply #17 on: November 10, 2005, 08:51:41 PM »
  Terry what is Vegemite ???
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eldar

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Re: Blown motor NOW I"VE DONE IT
« Reply #18 on: November 10, 2005, 09:15:21 PM »
OH NO  NO NOOO!! Do not get these wackos started on the vegemite! You would need to spend all day reading this post with as long winded as this subject gets! ;D
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Offline Harry

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Re: Blown motor NOW I"VE DONE IT
« Reply #19 on: November 11, 2005, 12:03:42 AM »
Quote from: 6adan on November 10, 2005, 08:51:41 PM
  Terry what is Vegemite ???

MODERATOR (speaking slowly in a loud clear voice): We wil not, repeat not, be going down this path again. Raul, sit down.....yees, you know who I mean, SIT DOWN! Terry, go out and wash your mouth...

BTW, 6adan, vegemite is a cheap Australian version of the nutrititious sandwich spread known as Marmite by Queen Elizabeth and her (loyal) subjects.
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Offline Bob Wessner

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Re: Blown motor NOW I"VE DONE IT
« Reply #20 on: November 11, 2005, 03:21:24 AM »
Quote
vegemite is a cheap Australian version

Uh, oh, now you've gone and done it!
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Offline SteveD CB500F

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Re: Blown motor NOW I"VE DONE IT
« Reply #21 on: November 11, 2005, 06:42:47 AM »
Quote from: ElCheapo on November 10, 2005, 05:27:39 PM
The turn signals are busted but who cares, a dangling turn signal works as good as a mounted one. ;D

In London (and probably everywhere else), a dangling turn signal says "I'm a motorcycle courier - keep well clear"

Usually (semi) attached to a black CX500 of indefinite vintage.
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Offline dpen

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Re: Blown motor NOW I"VE DONE IT
« Reply #22 on: November 11, 2005, 07:36:37 AM »
Did you know that the delicious & nutritous substance known as Vegemite was originally called "Pawill".

Then the imitators made a poor quality substitute & called it "Marmite".

To stop the whole sh*tfight, the champion Aussies changed the name to (drum roll & national anthem) Vegemite.
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eldar

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Re: Blown motor NOW I"VE DONE IT
« Reply #23 on: November 11, 2005, 08:03:09 AM »
aussies have a national anthem? I thought they all just ran around playing road warrior and hiding behind bushes???
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Offline dpen

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Re: Blown motor NOW I"VE DONE IT
« Reply #24 on: November 11, 2005, 08:24:23 AM »
Aaaahhhh, Mad Max. Another champion Aussie export in the shape of Mel Gibson.

Even though his physique and dashing good looks are not in the same class as yours truly.
« Last Edit: November 11, 2005, 08:26:21 AM by dpen »
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