Author Topic: Non destructive testing and engine part measuring  (Read 274 times)

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Offline arwtee

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Non destructive testing and engine part measuring
« on: November 28, 2019, 06:43:47 PM »
I just bought a cheap engine with a stuffed top end from a broken valve. I want to get the crank, conrods and case tested for cracks and distortion before going to the expense of a rebuild. Anyone know where I can get this done in the Sydney region?

Offline Momus

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Re: Non destructive testing and engine part measuring
« Reply #1 on: November 28, 2019, 07:02:57 PM »
At home is as good a place as any?

Do a visual for cracks. Use a bar that fits in the small end bore and a square to check the truth of the rod.

Measure your crank runout is inside the manufacturers limits with a dial guage with the crank in the cases.

Aviation standard non destructive testing is very pricey relative to the value of old motorbike bits.


Offline XRH348

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Re: Non destructive testing and engine part measuring
« Reply #2 on: November 29, 2019, 01:09:29 AM »
There should be a General Aviation supply store at the Sydney Airport.
Check with them for a "Dye Penetrant" crack detecting kit. it should be relatively inexpensive, and You tube should be able to show you how to use it.
its a three part system.
you spray the dye on, clean off the excess, then apply a spray on powder ( like talcum powder).
if there is a crack , the dye will have been absorbed into the crack, and then a thin line will show on the powder.

Offline arwtee

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Re: Non destructive testing and engine part measuring
« Reply #3 on: December 04, 2019, 05:34:15 PM »
Thanks, Yes, It is a bit of an overkill sending stuff away so I have explored the "at home" suggestion and it looks like the go.
The penetrant die kit isn't expensive and a great thing to have in the workshop to check for cracking that you can't see.
Dial guage and mount not expensive either.

Offline arwtee

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Re: Non destructive testing and engine part measuring
« Reply #4 on: December 05, 2019, 07:50:48 AM »
A forum member sent me an email recommended MT&C engineers in Silverdale, Sydney for crack testing. I checked and they are very reasonably priced so I might get them to magnaflux the crankshaft and rods and I will do the rest at home.

Offline skypig

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Re: Non destructive testing and engine part measuring
« Reply #5 on: December 05, 2019, 07:55:07 AM »
Would “magnaflux” testing be an appropriate test for 30yo road wheels (“Mags”)
Do they need to be paint stripped?
Approx cost?

Thanks in advance for any info.