Re: Rebuild Engine Block without Magnaflux?
[Re: vinnyd76]
#2449456
02/10/18 12:12 PM
02/10/18 12:12 PM
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Joined: Dec 2007
Posts: 18,157 Mass
DAYCLONA
I Live Here
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I Live Here
Joined: Dec 2007
Posts: 18,157
Mass
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A guy selling a 340 short block states that the motor was running when he received it. He had all the machine work done prior to reassembly. When I asked if the block was magnafluxed, he said no, it was a running engine no need. Risky move/purchase? Unless you personally know the running history of the block, it's not worth the chance, it's $100-$150 well spent before investing in a boat anchor
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Re: Rebuild Engine Block without Magnaflux?
[Re: vinnyd76]
#2449475
02/10/18 12:45 PM
02/10/18 12:45 PM
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Joined: May 2015
Posts: 1,134 Lost in Time
Iowan
super stock
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super stock
Joined: May 2015
Posts: 1,134
Lost in Time
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I magnaflux my blocks and iron heads on a refresh, and yes they were running and not hurt. I'd like to know before I put new dollers in an old block. On the flipside, I know guys that have never paid to have done and have been racing for twenty five years with no problems.
Have a great day Iowan
"obsolete is neat"
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Re: Rebuild Engine Block without Magnaflux?
[Re: Iowan]
#2449559
02/10/18 03:45 PM
02/10/18 03:45 PM
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Joined: Aug 2005
Posts: 1,043 Motown, Mi
PAULS_340
super stock
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super stock
Joined: Aug 2005
Posts: 1,043
Motown, Mi
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Vinny, Paul here with the '71 Demon. As you know my engine is getting re-done right now. It was kinda running when he got it and he magnafluxes all his rebuilds. He found a inch long crack in one of the valley's. My2C's
Still looking for LM29H1B415501, '71 Demon 340
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Re: Rebuild Engine Block without Magnaflux?
[Re: vinnyd76]
#2449576
02/10/18 04:08 PM
02/10/18 04:08 PM
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Joined: Jul 2011
Posts: 956 Chicago
PurpleBeeper
super stock
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super stock
Joined: Jul 2011
Posts: 956
Chicago
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A guy selling a 340 short block states that the motor was running when he received it. He had all the machine work done prior to reassembly. When I asked if the block was magnafluxed, he said no, it was a running engine no need. Risky move/purchase? Maybe you could offer him a partial payment pending passing a magnaflux?
70 Roadrunner convt. street car
440+6, NOS, 4-spd, SS springs
'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"
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Re: Rebuild Engine Block without Magnaflux?
[Re: ScottSmith_Harms]
#2450633
02/12/18 01:14 PM
02/12/18 01:14 PM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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Definitely magnaflux any 340. I've taken a part several that ran just fine only to find cracks upon teardown, most were in the lifter galley. They can crack from over heating,freezing, or just from too much stress/HP if raced. unfortunately it's pretty common. I haven't had a 340, but how common is it? I have had several 318 and 360 engines and never magnafluxed the blocks?
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Re: Rebuild Engine Block without Magnaflux?
[Re: rarefish]
#2451248
02/13/18 04:45 PM
02/13/18 04:45 PM
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Joined: Dec 2003
Posts: 10,938 Spokane Valley, WA
Big Bad Bee
I Live Here
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I Live Here
Joined: Dec 2003
Posts: 10,938
Spokane Valley, WA
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Seems crazy to gamble with it. Why risk all the rebuild money and time for $150? I read another similar question on another forum this week. "I'm rebuilding my engine. Should I reuse my rod bolts?" I built my car on the cheap for sure, but I absolutely don't get this line of thinking. The last thing I want to do after finishing my resto is replace an engine that I just built. Hanging over those shiny fenders and keeping things nice is a PAIN.
I’m listening.
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Re: Rebuild Engine Block without Magnaflux?
[Re: vinnyd76]
#2451294
02/13/18 06:20 PM
02/13/18 06:20 PM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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Thank you for the feedback! It was strange that the guy had all the necessary machine work completed, but decided against having it magnafluxed. Pretty common not to have it done. I've even talked to some guys with hot rods way nicer than mine who didn't even know what magnafluxing is.
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Re: Rebuild Engine Block without Magnaflux?
[Re: DaytonaTurbo]
#2451325
02/13/18 07:09 PM
02/13/18 07:09 PM
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Joined: Sep 2007
Posts: 14,889 up yours
Supercuda
About to go away
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About to go away
Joined: Sep 2007
Posts: 14,889
up yours
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Thank you for the feedback! It was strange that the guy had all the necessary machine work completed, but decided against having it magnafluxed. Pretty common not to have it done. I've even talked to some guys with hot rods way nicer than mine who didn't even know what magnafluxing is. Did those guys build their engines or pay someone else to?
They say there are no such thing as a stupid question. They say there is always the exception that proves the rule. Don't be the exception.
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