Scat Crankshaft block interference - Subtitle “why can’t anything be easy"

[frnkeore]

Let me add:

Take the picture of this, to the machine shop and he will know, just what your problem is and just what to do.

[My427stang]

I would certainly ask the machinist, but I would not necessarily turn it round again.  Everyone has a technique, but a chamfer like Frank says, working the high spot just enough to miss, etc.  This isn't a huge deal, my gut says that it skipped a minor machining process.  The one I had was a quick and easy fix

[mikeelikee]

is this crank offset improperly?

[blykins]

is this crank offset improperly?

The lip of the seal actually rides toward the front of the engine so the knurls are not misplaced.

[DuckRyder]

It is at the machine shop...

[DuckRyder]

Things you’d rather not hear your machinist (or Doctor) say:

"It was really bad"

[My427stang]

Things you’d rather not hear your machinist (or Doctor) say:

"It was really bad"

Certainly when things are measured in thousandths it was likely off by tenths, but despite it being shoddy and not right, the slinger isn't a critical dimension like a journal.  When you get it back you should be off to the races. 

FYI - Although I have always liked FM bearings and generally start with them for the rods, I have found them loose lately.  When you check your rod clearances, if you don't like them, consider a set of narrowed Clevites.  I strayed from Clevite a long time ago, but their numbers seem to be coming in better than the FMs on the BBC stuff

[DuckRyder]

I have the crank back, though I haven’t pulled it out and re-cleaned it yet.

I’m hoping Sunday for getting back to work on it.

They had a factory 390 (or 360) crank in the shop so he made the oil slinger identical to the OE crank except that it turned out slightly smaller in OD, I’m fairly confident it should be fine from here on.

I have Clevite for the mains, but still King for the rods, if for some reason they come out off on clearance, I’ll try the Clevite.

I will give SCAT the credit on the crank that the mains and rods were all very concentric I checked all of that, just haven’t gotten around to the rods themselves.

Edit To Add: Big props to Scotts Machine Shop in Fayetteville GA for fixing this and fairly quickly. Theses guys always do a good job if you need something in the ATL area.