How to magnaflux an engine block

Demonstration of magnafluxing an engine block. This is done to find cracks in an engine block. Block being used for demo is a chevrolet small block.

Category:

Autos & Vehicles

Tags:

• magnaflux
• magna-flux
• how
• to
• find
• crack
• in
• an
• engine
• block
• 4g63
• 4g63t
• dsm
• galant
• vr4

[idusclothing]

what if its aluminum?

[h22aaccord94]

@idusclothing Since you can't use magnetic particle inspection (magnaflux) on non ferrous metals, mostly people use dye penetrant inspection instead.

[h22aaccord94]

@4Liberty74 I appreciate the comment, and decided to look into it a bit so i asked a friend who has been a machinist for the last 30 years and currently does so for marine/racing applications. His response "I wouldn't be worrying about that. By the time the block is assembled, the residual magnetism has dissipated and the bores have been cleaned to within an inch of their life. Cast iron is fairly soft and is both quick to magnatize and quick to demagnatize. It's the nature of the material."

[mys13isdirty]

Good to know

[4Liberty74]

@ParaConMan

I didn't insult his work, simply stating a fact. I was just trying to save some newbee a lot trouble down the line. I'm sorry you took my comment as a negative, I sure didn't mean it that way. I've been doing Nondestructive Inspection for almost 20 years,.. just trying to spread som good info.

[ParaConMan]

@4Liberty74

dude its just a demonstration. its not meant for you to insult his work and make a 45 minute video from start to finish so you can make unwanted comments

[4Liberty74]

I sure hope he demagnetized that block afterward,... otherwise you'll pull every little piece ferrous metal into those cylinder bores. You'll be wondering why your rings have gone bad already.

[87ASC]

Interesting to see how it's done like that. Gives me insight on what is being paid for at machine shops.