A follow up to "oil starvation issues" thread

[HP HUNTER]

Originally Posted by Mike Taylor 3601

Have you had crank wet magged,cracked crank will flex and wipe mains out.
Wet magnaflux uses black light to see cracks.
I mag EVERY crank that comes through the shop,is figured in price of polishing or grinding,
you may mag a dozen and all be good and then next dozen have 6 or 8 cracked.
Mike Taylor 3601

Listen to this post.

[kansas stocker]

Are you positive that you had .003 on all mains? Have a circle track friend that had exactly the same results that you have had with the same little m block. His engine builder missed it twice and now he has a new builder.
Pete

[joespanova]

Originally Posted by kansas stocker

Are you positive that you had .003 on all mains? Have a circle track friend that had exactly the same results that you have had with the same little m block. His engine builder missed it twice and now he has a new builder.
Pete

I am 100% positive. I am the "builder" . I am a "machinist" of 40 years and use the most accurate currently available gauges used in our shop ( aircraft ).

[joespanova]

[joespanova]

[joespanova]

[joespanova]

SO ........there ya have it.
Disgusting isnt it.........

[joespanova]

Originally Posted by HP HUNTER

Listen to this post.

We refer to "wet mag" as an FPI process in aviation.
Fluorescent penetrant inspection (FPI )
I've never heard it referred as "wet mag".......but I believe that's what you or Mike mean.
And yes , I have the option of using traditional mag or FPI.

[Mike Taylor 3601]

Originally Posted by joespanova

We refer to "wet mag" as an FPI process in aviation.
Fluorescent penetrant inspection (FPI )
I've never heard it referred as "wet mag".......but I believe that's what you or Mike mean.
And yes , I have the option of using traditional mag or FPI.

wet mag is FPI when translated from hillbilly. Use the FPI on crankshaft.
If I didn't know anything about this crank and came into my shop,my first guess is it's cracked and would be surprised if it isn't.
I can't tell in picture but has the radius been ground less than original. Been reground and radius reduced? Normally BRC or any aftermarket crank would have 1/8 (.125'') radius at the least,can't tell about crank in picture,but rod bearing doesn't look like it would clear a .125'' radius,looks like it doesn't have the chamfer or narrowed to clear, if radius has been reduced that weakens crank.
Mike Taylor 3601
Mike Taylor 3601

[pmrphil]

I do see that the crank is burned only on one side, and not where the oil hole is. If it wasn't bent or cracked before, it's at least one or the other now. I don't recall if you said you had it checked for straight/cracks before.