Skip

Just got my crankshaft back from the shop after being drilled, polished, balanced, etc. On inspection, found that there is still quite a bit of metal inside leftover from machining.

How can I properly clean this out?

Current plan is to use air and water.

badcoupe

that and some brake parts cleaner. I usually buy some pipe cleaner brushes at the local smoke shop and run them through the passages as well. Lots of air too!

Tom M'Guinn

I bought a set of dedicated engine cleaning brushes from Summit -- like super pipe-cleaners made for cleaning oil passages and such. You can get all the way into the oil holes of the crank this way -- when used with brakecleen, you can be sure you've got all the junk out.

http://store.summitracing.com/defaul...=egnsearch.asp

Sorry, that link does not point to the product page -- click on Engine Brushes from that menu -- or find product MOR-61820

Skip

thanks for the info and link, guys!

MitchB

Skip -
Which shop did you use to machine your crank?

Skip

Mitch, I had it done through Fordahl Motorsports in Bellevue, WA. He has them cross-drilled 3/16" on #2 and #3 only.

He's done some flow testing and lifetime testing and this seems to work quite well along with a few other minor mods like using the S2 baffle and welding a ring around the oil pickup screen to keep from sucking air.

Greg's a superstar in the Porsche racing community as a crew chief - something about the winning Daytona and Le Mans teams this year and many others ala Alex Jobs and other teams.

Skip

bump for edited reply above

special tool

This is what I mean about some of these ********... imagine being in business and leaving ****ing shavings INSIDE someone's crank - and STILL the guy brags about how ****ing great you are. ONLY IN THE PORSCHE WORLD does this happen, ladies.

I have been in business for more than 15 years, I would rather cut my left nut off than have someone going around telling people I left shavings in their crank.

Skip

That's kinda fair I guess - I was a little bummed when I got it back. That said, I haven't heard from anyone yet who says their crank was plug-n-play either. I think I'd clean it thoroughly even if I didn't see anything.

Tom M'Guinn

For what it's worth, virtually every engine building book says to clean and measure parts when they come back from the machine shop, regardless of assurances and reputations... My recent crank was clean as a whistle, but the block still had some honing paste in the crank area.

special tool

I'd bet $1000 that if Jason was cleaning cranks,it would be clean enough for brain surgery - after you got rid of that packing popcorn, of course.

Skip

Oh no, not with the packing peanuts again. Yours are getting shreader confetti from now on!