 Where does this part go?, From the dapo files |
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| ChrisFoley |
 Jun 27 2017, 08:27 AM
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#21
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I am Tangerine Racing  Group: Members Posts: 7,920 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None 
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QUOTE(rgalla9146 @ Jun 27 2017, 10:18 AM)  To 'repair' a crack (and oil leak !) in the block due to a overtightened sump plate. That's not the center stud. More likely the case was bolted up with the cam bearing out of position, but even that's hard to believe. The visible crack is horizontal, oil comes out at a steady rate, along the center of the bearing saddle. I measured another case. The saddle is 3/8" thick there. Now the $5000 question. Can it be repaired satisfactorily without a full teardown? Or should I just tell the new owner the engine is junk? |
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| Valy |
Jun 27 2017, 08:34 AM
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#22
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Senior Member Group: Members Posts: 1,671 Joined: 6-April 10 From: Sunnyvale, CA Member No.: 11,573 Region Association: Northern California |
QUOTE(Racer Chris @ Jun 27 2017, 07:27 AM) QUOTE(rgalla9146 @ Jun 27 2017, 10:18 AM) To 'repair' a crack (and oil leak !) in the block due to a overtightened sump plate. That's not the center stud. More likely the case was bolted up with the cam bearing out of position, but even that's hard to believe. The visible crack is horizontal, oil comes out at a steady rate, along the center of the bearing saddle. I measured another case. The saddle is 3/8" thick there. Now the $5000 question. Can it be repaired satisfactorily without a full teardown? Or should I just tell the new owner the engine is junk? Just ask the owner if he has more of that magic black glue and move on... (IMG:style_emoticons/default/biggrin.gif) |
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| McMark |
Jun 27 2017, 11:03 AM
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#23
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
QUOTE More likely the case was bolted up with the cam bearing out of position, but even that's hard to believe. Not really. The flange bearing is a tight fit into the camshaft and if the crank turns slightly while assembling the case halves it can cause the two cam bearings to overlap. I'm extremely diligent about this when I put case halves together and I've caught it trying to do this multiple times. But if that's what happened, the case is trash. No cost effective fix. And nothing you can do without disassembly that would be reliable in the long run. Plus if it was the cam bearings, then those bearings are TOAST as well. Nothing about that says salvageable. |
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| Mark Henry |
Jun 27 2017, 02:22 PM
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#24
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that's what I do! Group: Members Posts: 20,065 Joined: 27-December 02 From: Port Hope, Ontario Member No.: 26 Region Association: Canada |
I've seen it all but that's a new one even to me.
I had a guy come in with a leaking bug engine , leaking right from the top of the case. Chipped out the devcon and yep... great big fork'in hole. A PO had thrown a rod, fixed the case with devcon and put her back together. (IMG:style_emoticons/default/blink.gif) |
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| ChrisFoley |
Jun 28 2017, 07:06 PM
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#25
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I am Tangerine Racing Group: Members Posts: 7,920 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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QUOTE(McMark @ Jun 27 2017, 01:03 PM) QUOTE More likely the case was bolted up with the cam bearing out of position, but even that's hard to believe. Not really. The flange bearing is a tight fit into the camshaft and if the crank turns slightly while assembling the case halves it can cause the two cam bearings to overlap. ... What I meant is that it's hard to believe someone torqued down the case to the point of breakage in that location, not that the bearing could move and become overlapped. I've already found another crankcase to work with. |
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| ChrisFoley |
Aug 8 2017, 01:27 PM
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#26
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I am Tangerine Racing Group: Members Posts: 7,920 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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Teardown is done.
Here's the crack from the inside.  |
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| 11tenths |
Aug 8 2017, 02:11 PM
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#27
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Ve get too soon old, und too late schmart Group: Members Posts: 142 Joined: 11-October 12 From: Islip, Long Island, NY Member No.: 15,026 Region Association: North East States
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| ChrisFoley |
Aug 8 2017, 03:02 PM
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#28
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I am Tangerine Racing Group: Members Posts: 7,920 Joined: 29-January 03 From: Bolton, CT Member No.: 209 Region Association: None
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QUOTE(11tenths @ Aug 8 2017, 04:11 PM) It's yours for the cost of shipping if you feel like trying, Harry. (IMG:style_emoticons/default/biggrin.gif) |
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| Ed_Turbo |
Aug 8 2017, 04:31 PM
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#29
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Member Group: Members Posts: 440 Joined: 5-June 17 From: Hacienda Heights, Ca. Member No.: 21,151 Region Association: Southern California |
QUOTE(BillC @ Jun 27 2017, 05:41 AM) Where does it go? In the trash. (IMG:style_emoticons/default/av-943.gif) I guess the bigger questions are: where did it come from and what was it supposed to do? (IMG:style_emoticons/default/lol-2.gif) Cheap fix for a neglected engine kinda like exercise pants for a married woman. |
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