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12-04-2020, 09:47 AM | #1 |
Junior Member
Join Date: Apr 2014
Location: Princeton,Mn
Posts: 12
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Block cleaning and magnaflux
Hey fellas- Can anybody recommend a place in Minnesota to get my flathead block cleaned and magnafluxed? I live between St Cloud and Princeton,but will drive as far as needed. Thanks
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12-04-2020, 10:58 AM | #2 | |
Senior Member
Join Date: May 2010
Location: Long Island, NY
Posts: 1,052
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Re: Block cleaning and magnaflux
Quote:
Thanks, Gary in N.Y. P.S. "Magging" is definitely OK though! Pressure test first, "mag" second! (Tip), whatever shop you choose for machining try to find one that has a block-plate to finish hone the bores?
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12-04-2020, 11:05 AM | #3 |
Junior Member
Join Date: Apr 2014
Location: Princeton,Mn
Posts: 12
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Re: Block cleaning and magnaflux
Thanks Gary. I will try to find someone to pressure test then.
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12-04-2020, 11:10 AM | #4 | |
Senior Member
Join Date: May 2010
Location: NJ
Posts: 6,181
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Re: Block cleaning and magnaflux
Quote:
Clean it the best you can at home first before doing any tests. The fifth block that I wound up using had so much crud in the rear of the block, I literally could drive a long screw driver into the mass like a nail into wood. If I keep that crud in, I believe it would have sealed a leak while pressure testing. When you are up and personal with the block, you can sometimes find cracks yourself before spending any money on any services. On two of them, I was able to locate cracks by eye. Its a dirty job, but a necessary step. Use braided cable in a drill, screw drivers, coat hanger, or anything you can to get in there and clean as much out as you can first. Having it on a stand helps because you can tilt the block to get the crud to fall either forward or back and you can vacuum it out with a shop vac. Once you scrape out as much as you can, then have it pressure tested. I prefer to give it a quick cleaning dip before magging it. If it all checks out, I highly recommend a bake and blast cleaning before the machine work starts to get any of the remaining crud out. After machining, it will need to be dipped cleaned again to get rid of the metal dust that is there. A rag cleaning doesn't always get off all of the cast iron dust left from the machining process. Many steps involved but worth the effort and expense to ensure you have a good block before building. Last edited by Tim Ayers; 12-04-2020 at 11:55 AM. |
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12-04-2020, 11:49 AM | #5 |
Junior Member
Join Date: Apr 2014
Location: Princeton,Mn
Posts: 12
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Re: Block cleaning and magnaflux
Thanks for all the info,Tim. The knowledge on this site is amazing
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12-04-2020, 07:49 PM | #6 |
Senior Member
Join Date: Jan 2011
Posts: 342
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Re: Block cleaning and magnaflux
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12-04-2020, 08:48 PM | #7 |
Member
Join Date: Oct 2020
Posts: 73
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Re: Block cleaning and magnaflux
best way is the furnace method
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12-04-2020, 09:07 PM | #8 |
Junior Member
Join Date: Apr 2014
Location: Princeton,Mn
Posts: 12
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Re: Block cleaning and magnaflux
Thanks swedish steel. Little falls isn't that far away
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12-05-2020, 05:53 PM | #9 |
Member
Join Date: Jul 2019
Location: St. Paul MN
Posts: 30
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Re: Block cleaning and magnaflux
You could check on this place. https://wagamonbrothers.com I have not used them but I know they do flat heads. I stop there for something and they had a couple on the floor. I used this shop in New Brighton MN when I rebuilt my willys 134 flathead. They did a great job on the block and machine work. Very friendly. I think it is called Metro Engine service (52 1st St SE, New Brighton, MN 55112 +16516364008. I know it is in the same building. They changed there name a couple years ago. They are very busy. But have done a lot of flatty's.
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12-06-2020, 09:52 AM | #10 |
Junior Member
Join Date: Apr 2014
Location: Princeton,Mn
Posts: 12
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Re: Block cleaning and magnaflux
Thanks for the info,kketchmark
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