Pinto crank sprocket orientation?

[EricP]

I’m swapping over my oil pan and pump to a refreshed Elite engine I bought. It was refreshed by someone other than Elite. I’m putting the crank sprocket that drives the timing belt on. The manual I have says put the chamfer IN toward the crank. But the one that came off the Elite engine had the chamfer facing out and is clearly marked with paint “IN” on the non-chamfer side. It doesn’t change the alignment of the other drive sprockets and the chamfer is only about 1/16” so I’m not sure it matters... BUT...

[EricP]

Chamfer out...

[BeerBudgetRacing]

I put the chamfer in - and you scared me.

Vizards book "how to rebuild your 1.3/1.6/2.0 OHC Ford"
p137 "chamfered side toward the block"

Whew !

Makes sense. The front belt guide needs more surface to be bound.

[DaveW]

Is there a radius on the crank where that seats? Usually a chamfer is made to accommodate that sort of thing.

[EricP]

I put the chamfer in - and you scared me.

Vizards book "how to rebuild your 1.3/1.6/2.0 OHC Ford"
p137 "chamfered side toward the block"

Whew !

Makes sense. The front belt guide needs more surface to be bound.

That is the exact book I looked at too. I’m guessing the rebuilder mislabeled the flat side “IN”.

[EricP]

Is there a radius on the crank where that seats? Usually a chamfer is made to accommodate that sort of thing.

It isn’t notched but the chamfer does match the radius of the crank where they meet.

[tlracer]

Chamfer inward, so the pulley doesn't chafe the crankshaft oil seal.

[DaveW]

That is the exact book I looked at too. I’m guessing the rebuilder mislabeled the flat side “IN”.

It isn’t notched but the chamfer does match the radius of the crank where they meet.

You answered your own question - chamfer towards the crank.