Question on 401 just picked up

[mika01]

Picked up this 401 over the weekend and I have questions on some markings that it has. On the front of the block just above the timing cover (barelly visible) it has stamped on the block "*gaging*4580" anybody know what this means???

It also has a little round thing stamped on the block and it says "warranty void if removed"? Dont know what to make of it because the pistons say "std" on them so I dont think it was rebuilt.

[1980_Cj7]

I've heard that some shops put little heat sensors on engines when they rebuild them. If you over heat the engine, they can tell by looking at them. I thought they were put on the freeze plugs, but have never actually seen one.

[hotratz]

Usually those little round buttons are an over temperature indicator put on by engine rebuilders. I don't think they come from the factory with them. It's a way of the rebuilder to know if you over heated your engine (it melts at a certain temp) that way you can't claim warrantee.

EDIT: Damn! You beat me to it

[Mudrat]

Time to void the warranty and remove that sucker

We use little round discs like that on rotating machinery to mount vibration sensors though ....

[mika01]

Thanks, looks like the engine was rebuilt but honed only not bored. Also the cam has #2491 stamped at the flywheel end, cant find any manufacturer name. Anybody know what this is? i assume its a replacement OEM grind?

[mika01]

Also what would you guys think if I used the 401 cam in a 360? Its rebuilt with about 5000 miles on it, new heads roller rockers, performer intake and 650 Edy. I saw on American Motors Forum that the 401 cam has a little more lift and duration then the 360 cam.
304/360 Cam lobe lift .266"
401 .286"

304/360 intake duration 263.5
401 296.32

304/360 exhaust duration 263.5
401 303.55

[tufcj]

The tag and stamping probably indicate that the motor was remanufactured at a larger shop at some time. The tag is exactly what was mentioned above, and the stamping so the shop could ID the motor in case of warranty return.

Bob
tufcj