OzVMX Forum
Clubroom => Tech Talk => Topic started by: arwtee on November 28, 2019, 06:43:47 pm
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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?
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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.
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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.
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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.
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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.
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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.