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08-12-2012, 12:23 PM | #1 |
Senior Member
Join Date: Dec 2010
Location: Verdi, Nevada
Posts: 166
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Model B Block Crack
I've sent a similar post previously about this and thought we had the problem solved. What I have is a B block with water running out of the # 5 and # 6 valve seats, both the intake and exhaust valve ports have water coming out of the side of the block when I take the manifold off, with water in the # 3 cylinder when I pull the head. The machine shop did a pressure test and "sealed" the crack with a ceramic seal under pressure, but as soon as I put a 100 + miles on the engine and brought it up to temp the crack has again opened up. This block was magnafluxed before we did all the work on it, but did not find this crack until all was done (valve seats, sleeves, insert bearings),,,,. I have too much invested in this engine to junk it, does anyone have or know of anybody who may be able to salvage this block? I would appreciate any help
Thanks Rick Jensen 775-527-1419 [email protected] |
08-12-2012, 01:26 PM | #2 |
Senior Member
Join Date: May 2010
Location: on the Littlefield
Posts: 6,159
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Re: Model B Block Crack
http://www.locknstitch.com/
They probably had too much work in the block before they found the crack to tell you, one of the problems is that the cleaning methods obscure some of the cracks, when the counter bore was cut for the valve seat--cracks will show, when the cyl was bored for the sleeve --cracks show, most times I can see a valve seat crack without magnaflux -before any cleaning is done |
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08-12-2012, 01:38 PM | #3 | |
Senior Member
Join Date: May 2010
Location: 60615,330th Ave.,Clare, Iowa, 50524
Posts: 1,457
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Re: Model B Block Crack
Quote:
Call J and M Machine Co. 508-460-0733, Southborough, Ma. |
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08-13-2012, 08:54 AM | #4 |
Senior Member
Join Date: Dec 2010
Location: Verdi, Nevada
Posts: 166
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Re: Model B Block Crack
Thanks for the info. Called and talked with John this morning. I'll ship my problem block to him
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08-13-2012, 09:41 AM | #5 |
Member
Join Date: May 2010
Location: Visalia CA
Posts: 86
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Re: Model B Block Crack
I have a B block with similar cracks. I had Taylor Machine in LA to the braze on the cracks. I still have the block with the repairs, but since I found another block, I have not put this one back in a car.
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08-13-2012, 09:50 AM | #6 |
Senior Member
Join Date: May 2010
Location: Camino, CA.
Posts: 3,086
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Re: Model B Block Crack
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08-13-2012, 03:55 PM | #7 |
Senior Member
Join Date: Aug 2010
Location: Grass Valley,CA
Posts: 295
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Re: Model B Block Crack
There is an outfit in or near Turlock,CA that does "crack stitching" Hey I found it...
LOCK-N-Stitch Inc. 1015 S. Soderquist Rd. Turlock,CA 95380 www.locknstitch.com 1-800-736-8261 |
08-13-2012, 06:03 PM | #8 |
Member
Join Date: May 2010
Location: Visalia CA
Posts: 86
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Re: Model B Block Crack
The cast iron area below the head inside the valve chamber is connected to the water chamber and is much too thin to do the "crack stitching". The head surface on a B is thinner than an A but can be stitched or "lap pin" repaired. The block will still need to be surfaced when the pin job is finished and make the block even a bit thinner but usuable as long as you don't over-heat the engine ........ which is probably why it cracked in the first place.
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