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Main Bearing differences
Posted: April 29th, 2009, 7:00 am
by lafrad
I'm interested in finding the differences between the main bearings throughout the years...
What makes the early 4.2L bearings different than the recent 4.0L bearings?
Anyone have pictures?
Re: Main Bearing differences
Posted: April 29th, 2009, 8:32 pm
by rradford9
Position of the locating tangs. On the 4.2L and the '87-'90 4.0's the locating tangs are offset. In the '91+ 4.0L's the locating tangs are offset. I have a set of 4.2 mains that I didn't use. You want me to take a picture of them?
Re: Main Bearing differences
Posted: April 30th, 2009, 7:21 am
by lafrad
that would be great!
Re: Main Bearing differences
Posted: August 12th, 2009, 6:15 pm
by lafrad
Doh!
Looks like we lost some momentum here.
360 Oiling:
I'm looking to get a set of bearings where the "Oiling Shell" has the same tang location as the "main cap" on a 1999 4.0L block. THis way, you can install 2 "oiling shells" for each main bearing and get oil pressure to the rod for 360* of crankshaft rotation. If it is something as easy as "buy a set of 4.2L main bearings and mix/match" I would LOVE it. 360 oiling means 360* of oil pressure on the rod, and 360* of oil slinging off each rod to throw at the camshaft.