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Author Topic: Help needed cracked engine block  (Read 1074 times)

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Offline bomber

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Help needed cracked engine block
« on: May 16, 2013, 04:11:32 PM »
Hello every one!
Thanks a lot for all the information on the forum, I'm still going thru tons of posts.
So I got my self a project... it took me a while to sort out little gremlins, and still a lot to do but today I realized that I have crack in engine block.
Funny enough oil doesn't seems to leak from that crack, I have a very slow drop on the end of gearshift spindle...

I'm thinking to either drop this bike and get something in better condition or.... bit the bullet and get new engine block...
I don't want to sell this bike, I love it and spent to much cash already plus this would be a defeat and i don't like that, on the other hand splitting engine and putting it together is something I've never done and so I'm a bit concerned...

Many thanks for advice!
There is a block going on eBay in UK right now...
My bike is 1976 CB550F

Regards
Greg
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Honda CB550F1 1976 Fire and Oil spitting machine.
Resident: London UK
Born: Poland

Offline bomber

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Re: Help needed cracked engine block
« Reply #1 on: May 16, 2013, 04:15:06 PM »
Another picture attached.
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Honda CB550F1 1976 Fire and Oil spitting machine.
Resident: London UK
Born: Poland

Offline uksparky

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Re: Help needed cracked engine block
« Reply #2 on: May 16, 2013, 04:57:54 PM »
If you can... use JB weld...amaizing stuff..
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Offline Xnavylfr

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Re: Help needed cracked engine block
« Reply #3 on: May 16, 2013, 05:02:08 PM »
Before you can use JB WELD you will need to clean the area REAL good with some acetone to remove any oil.. The JB Weld wont bond to oily surfaces!!!


Xnavylfr(CHUCK)
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Offline Old Scrambler

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Re: Help needed cracked engine block
« Reply #4 on: May 16, 2013, 05:17:57 PM »
Good advice from both..............minor at this point but REALLY clean it AFTER you drain the oil and prop the bike so the bottom of that case area drains. You may want to very slightly score the edge of one side of the crack to allow some room for the JB Weld to "fill" the space.  Follow the directions and don't fill the case too soon.  If you later have a small oil weep, you can remove the JB Weld and re-do the patch.
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Offline bomber

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Re: Help needed cracked engine block
« Reply #5 on: May 16, 2013, 11:35:08 PM »
Thank you!
Sounds like a good plan, I thought that would be the end of my bike...

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Honda CB550F1 1976 Fire and Oil spitting machine.
Resident: London UK
Born: Poland

Offline dave500

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Re: Help needed cracked engine block
« Reply #6 on: May 17, 2013, 12:39:19 AM »
umm?drop the pan,you might find its only a casting flaw?ive seen a few similar looking mold markings,the bolt should be holding it squared up?,man i think if that was cracked and slipped out of line that bad it would be pissing niagra falls oil?clean the area right up first and take a closer look,heres a random case i have,its a parting line in the casting mold.
« Last Edit: May 17, 2013, 12:51:25 AM by dave500 »
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Offline totty

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Re: Help needed cracked engine block
« Reply #7 on: May 17, 2013, 02:10:29 AM »
Dave500 is correct, it's a casting flaw - my 550 has an identical looking one in the same place that I initially thought was a crack.
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Offline dave500

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Re: Help needed cracked engine block
« Reply #8 on: May 17, 2013, 02:15:46 AM »
ha!good if your viewing a bike for sale?"oh man the case is cracked!"ill give you 50% of your asking price to take it off your hands?a little innocent grifting never hurt?
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Offline bomber

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Re: Help needed cracked engine block
« Reply #9 on: May 17, 2013, 02:22:39 AM »
AMAZING!
That would explain why there is no oil drip form there.
Man I had a nervous brake down when I saw it yesterday.

And yes there is so much gunk around plus the silver hamerite all over the place.

Thanks a bunch!!!
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Honda CB550F1 1976 Fire and Oil spitting machine.
Resident: London UK
Born: Poland

Offline dave500

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Re: Help needed cracked engine block
« Reply #10 on: May 17, 2013, 02:29:00 AM »
thatll be a beer man!you should see these castings on the inside,,a few members have freaked and thought they had dud cases or cracks etc.
« Last Edit: May 17, 2013, 02:30:54 AM by dave500 »
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Offline lucky

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Re: Help needed cracked engine block
« Reply #11 on: May 17, 2013, 08:57:19 AM »
A good visual inspection always should include cleaning the area AND using a bright LED flashlight.
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