The Ford Barn

Tony G · 10-17-2010, 10:36 AM

I took apart a Model A engine this week that someone let rain get into the oil pan. After disassembly I found all of the bearings near perfect and the fit was great. The only damage is on the center main journal. Where the oil feed hole lines up from the block there's a small shallow 1/4 inch rust spot with shallow line following the bearing grove imprinted on the crank journal.Could the spot be ground below flush and then polished ?

Thanks for any input.

TG

JoeWay · 10-17-2010, 10:51 AM

No need to grind--just clean off the rust. So long as nothing is sticking up above the original surface, you should be fine as it sounds like only a very small area is affected.

Joe

J Franklin · 10-17-2010, 11:14 AM

A machine shop can polish the journal if you can't there are fine emery cloths and finishing sandpapers available

Patrick L. · 10-17-2010, 01:20 PM

I agree,, clean it up with some emery paper and see what it looks like.. Its surprising what these bearings can tolerate..

Jazzjr · 10-18-2010, 12:02 AM

Sponsored Links (Register now to hide all advertisements)

The correct thing to use when you try to clean up the rust spot off the Crank is called Crocus Cloth. Go to any automoive machine shop, and ask for it !! They will probly give you a piece when you tell them that you are using it on a Model A. Sand Paper or Emery Cloth could scratch the Journal.

10-17-2010, 10:36 AM	#1
Tony G Member Join Date: May 2010 Location: NewHampshire Posts: 52	Main Bearing I took apart a Model A engine this week that someone let rain get into the oil pan. After disassembly I found all of the bearings near perfect and the fit was great. The only damage is on the center main journal. Where the oil feed hole lines up from the block there's a small shallow 1/4 inch rust spot with shallow line following the bearing grove imprinted on the crank journal.Could the spot be ground below flush and then polished ? Thanks for any input. TG

10-17-2010, 10:51 AM	#2
JoeWay Senior Member Join Date: May 2010 Location: Quincy CA Posts: 752	Re: Main Bearing No need to grind--just clean off the rust. So long as nothing is sticking up above the original surface, you should be fine as it sounds like only a very small area is affected. Joe __________________ 1929 Tudor since 1962 Feather River A's

10-17-2010, 11:14 AM	#3
J Franklin Senior Member Join Date: May 2010 Location: Oregon Posts: 5,959	Re: Main Bearing A machine shop can polish the journal if you can't there are fine emery cloths and finishing sandpapers available

10-17-2010, 01:20 PM	#4
Patrick L. Senior Member Join Date: May 2010 Location: Largo Florida Posts: 7,225	Re: Main Bearing I agree,, clean it up with some emery paper and see what it looks like.. Its surprising what these bearings can tolerate..

10-18-2010, 12:02 AM	#5
Jazzjr Senior Member Join Date: May 2010 Location: Crown Point, NY and Punta Gorda, FL. Posts: 259	Re: Main Bearing Sponsored Links (Register now to hide all advertisements) The correct thing to use when you try to clean up the rust spot off the Crank is called Crocus Cloth. Go to any automoive machine shop, and ask for it !! They will probly give you a piece when you tell them that you are using it on a Model A. Sand Paper or Emery Cloth could scratch the Journal.