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PINNING BLOCK

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jim in ky

05-21-2002 07:30:43




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I have a TO-30 with a cracked blocked and i have heard of pinning the cracks is this hard to do or can it be done with simple tools. Do you have to order these pins, getting desprate need to try something. Thanks for all information. Jim




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Fred Oh

05-22-2002 07:34:49




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 Re: PINNING BLOCK in reply to jim in ky, 05-21-2002 07:30:43  
Jim, you might help your problem more by describing where the cracks are at so the board can be more helpful to you. Some places are pinned, some are bolted and some are welded. In any case, I don't believe I'd use stainless steel on one as I tend to think that as they rust, they seal better. I'd use all thread, as it is soft and when they are sawed off and tapped with the ball peen end of a hammer, they have a tendency to swell and make themselves fit tighter. Just an opinion. PS Ship us up some of that southern weather you got down there. It was 30 degrees here last night in southern (Greenfield) Ohio. Fred

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jim in ky---to fred (oh)

05-23-2002 04:53:45




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 Re: Re: PINNING BLOCK in reply to Fred Oh, 05-22-2002 07:34:49  
Hi fred, my block is cracked between all cylinders i have never pinned anything before.
Is it something I can do with basic tools? A block is 4 to 5 hundred dollars in my area that has been weilded and they say it may still crack. Where do i get the pins? Thank you for your help.



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Fred OH

05-24-2002 06:50:26




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 Re: Re: Re: PINNING BLOCK in reply to jim in ky---to fred (oh), 05-23-2002 04:53:45  
Jim, pinning a block is a process of drilling holes (along the crack)and threading them and screwing in soft steel into the holes, sawing the pins off an 1/8" long and taking a ballpein hammer and pounding them to swell them in the crack. Then, carefully grind and file them off till they are flush with the top of the block. The pins overlap one another meaning that as you drill the second one, you drill partly into the first one. I wouldn't recommend it for a novice mechanic. Look for an old one who has done it before and learn from him. Some just drill a 3/8"hole all the way through the block between the cylinders (Down a little from the top of the block)and put a bolt through it and draw it tight to prevent further spreading, probably using epoxy on the head and tail of the bolt to keep it from leaking. Others think that if it will hold a head gasket to just ignore it. The sleeves and head gasket seal the cylinder to the head so put it back together and put in a can or two of radiator sealer and not use it for any real hard service. It may have been cracked for years. It will look good painted resale red if you get my point. And before anybody gets any ideas about me, I have never sold one like that, it's just another option that some take. So, with all that said, would I weld it? It's a heck of a job, and a good welder is expensive and it will be down for a good while with no guarantee that it will hold. Radiator sealer and bolts get my vote. If you do it this way, there is a charge for this service, in that you have to report back to the other board members as to how it's holding up from time to time. Fair enough? Fred

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jim in ky

05-24-2002 12:12:10




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 Re: Re: Re: Re: PINNING BLOCK in reply to Fred OH, 05-24-2002 06:50:26  
THANKS FRED (OH) DON'T GUESS I BETTER TRY IT SOUNDS TOO MUCH FOR ME WATER IS DRAINING IN CYLINDERS I THINK IT IS TOO BAD FOR SEALER. ENGINE IS STUCK IF I GET IT UNSTUCK I WILL TRY BLOCK SEALER. THANKS AGAIN. JIM



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Phil (VA)

05-21-2002 08:39:25




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 Re: PINNING BLOCK in reply to jim in ky, 05-21-2002 07:30:43  
I got a pro who had done it before to do mine. He used stainless steel threaded rods. Cost about $200 a year ago, if I remember correctly.



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