Front hub - do I have a problem? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Railroadman · Yesterday, 09:46 PM

'66 C20. I'm seeing 2 lines inside the hub, diametrically opposite each other and each centered on the square notch. I THINK they are something from casting or machining, but want to be sure they're not cracks. Opinions?

SkinnyG · Yesterday, 11:23 PM

Cast metals do not usually crack only partway, they don't really flex - they just crack completely. What does the other side look like? Any cracks on the machined surface?

You could hang it by a wrench or on a nail and give it a wee rap with a hammer - if it rings, it's likely fine, if it's more of a thud, it may actually be cracked.

Yesterday, 09:46 PM	#1
Railroadman Registered User Join Date: Jun 2016 Location: Rochester NY Posts: 114	Front hub - do I have a problem? '66 C20. I'm seeing 2 lines inside the hub, diametrically opposite each other and each centered on the square notch. I THINK they are something from casting or machining, but want to be sure they're not cracks. Opinions? Attached Images

Yesterday, 11:23 PM	#2
SkinnyG Registered User Join Date: Feb 2012 Location: Beautiful BC, Canada, eh?! Posts: 2,252	Re: Front hub - do I have a problem? Cast metals do not usually crack only partway, they don't really flex - they just crack completely. What does the other side look like? Any cracks on the machined surface? You could hang it by a wrench or on a nail and give it a wee rap with a hammer - if it rings, it's likely fine, if it's more of a thud, it may actually be cracked. __________________ 1961 Apache: "Grabber Orange" Shortboxed, pancake, step-notch, air-ride, boosted-LS 1977 Silverado: Shortboxed & dropped, potato-potato V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag Lotus Super 7 Replica: Scratch-built street-legal rollerskate



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