Tore my engine dow a little further. - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 12 (permalink) Old 10-24-2011, 01:26 AM Thread Starter
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Tore my engine dow a little further.

I took the rear cylinder and piston off of my engine this afternoon.
I soon realized why the engine is so hard to turn over.
The rear rod is seized to the crank, and the front rod bearing is gone.
There is a good 1/8 play in the front rod, so now I know where the copper shavings come from. I had a good idea the rod bearing was bad, but not that bad.
I'm waiting to find a bolt to pull the stator so I can get the front cylinder off so I can split the cases.
Damn! I was hoping for a better find, but I knew in the back of my head otherwise.
I will post pics as soon as I get the cases apart.
Back to court I go.
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post #2 of 12 (permalink) Old 10-24-2011, 01:38 AM
If only it had 6th gear..
 
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Wow man. Hope it goes smoothly for you. Best of luck.

Dave

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post #3 of 12 (permalink) Old 10-24-2011, 01:52 AM Thread Starter
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I have found a crank and rod assy from another member. I just need to get the funds together to get them.
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post #4 of 12 (permalink) Old 10-24-2011, 10:13 AM
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If you can't find a bolt let me know. If you pay the shipping you can have one of the ones I got.

02 honda sabre 1100
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post #5 of 12 (permalink) Old 10-24-2011, 11:23 AM
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Welcome to the club Bill. That's just what we found. Both rods frozen but, no copper filings. We should be able to just replace inserts.

I think what happened in our engine is that all the filings from the counter-balance grinding pieces up clogged the oil filter. When the oil pressure got high enough the relief valve popped and let all the filings into the oil passages. Filings were every where. The oil holes in the crank shaft were full leading to bearing failure. There were even filings in the little oil filters that protect the HLA's. TGFT's.

I have a question about rod play. With the old inserts in and the rods on the crank. The rods have noticeable linear movement. Didn't have plasti-gage. Do you think you could feel the oil gap move? There is some rocking movement side to side. How much is tolerable?

Thanks and Good Luck Bill
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post #6 of 12 (permalink) Old 10-24-2011, 11:50 PM Thread Starter
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I'm not sure about the side to side movement. I know there will be a little bit, but it can't be too much, or it wouldn't allow oil pressure to build up.
I know on a car, if the rods & mains have too much clearance, the oil pressure will be low.
I will have to read in the manual to see what the specs are.
The rear rod is frozen to the crank, but it will turn with a quite a bit of force. The front rod flops around on the crank. I think the bearing is gone.
All I know is that it's going to cost me a lot of money to get it going.
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post #7 of 12 (permalink) Old 10-25-2011, 11:01 AM
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When we first got this bike(2001vn750) it would not turn over. Both side engine covers were AWOL and a majority of the innards.

We tried turning it over with a breaker bar on the primary nut but it wouldn't budge.

Then we added a strap wrench around the rotor. It took both of us to break it free(and we're no lightweights 245lbs and 250lbs).

Had hoped that with exersize it would start turning more easily.

Didn't happen.

The starter would turn it over very slowly and only 1 or 2 times before it needed a boost.

After wasting way too much time trying to free it up by hand we finally took the plunge.

I have new respect for that starter.
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post #8 of 12 (permalink) Old 10-30-2011, 10:33 PM Thread Starter
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I finally got the engine torn down.
The front rod is toast along with the crank.
The bearing spun on the crank, and tore the crank up pretty good.
The rear rod is still intact, the bearing is good other than a scar mark from metal shavings on the bearings themselves.
I thought it was seized to the crank, but it wasn't.
A piece on the front rod bearing had wedged itself between the rods, and after I pulled the piece out the rear rod moved fine.
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post #9 of 12 (permalink) Old 10-30-2011, 10:35 PM
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Are the rods interchangeable??

02 honda sabre 1100
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post #10 of 12 (permalink) Old 10-30-2011, 10:42 PM Thread Starter
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I believe they are interchangeable. I will look at the manual to see, but I don't see any difference in them.
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