Mixing bearings for clearance

[Chris "drooze" Wertman]

Originally Posted by Rich Biebel

Chris...there is a lot of good info here......I have used this procedure for mixing bearings and it never failed me.....


http://www.enginebearings.com/it_bearinginstall.asp

If you will accept a little advice........Bearing clearance is usually safer on the looser end of a set of specs.......0027" to .0032' is a good range for most engines........

Thanks, I read that earlier and am going to print it out till I have "reflex", Im open, whats the worst that can happen ? At this point weve contributed over 900lbs to the Chineese scrap metal market

Im open to advice, always in the end I weigh it all and the pros and cons, sometimes I make the right decision sometimes not (when not I always say shiiiitttteee, shoulda done X)

Im hearing looser is good and on a motor with 0 run in before it gets flogged, I was just talking with the old man and we decided to target .003 +/- .0002 I think with the coatings that should be "safe" Are you running that across the board (mains and rods ?) Or just rod side ? My gut says a hair tighter on the mains, but well......I think that would be ok across the board.

Im doing my own coatings as usual, so Ive got 2 different coatings that I know and how much 1 is a pretty high build but sick tough, the other a little less durable over the long haul but pretty slick stuff, very very thin, Ive got to mic the cranks a bit better and see which will work better where, Id LIKE to use the Ceramic based but its a pretty high build. Im thinking on the Crank Ill use a moly di, and the bearings a ceramic IF I can clearance wise, already got the "test bearings an parts" set aside......time for the Apron and Cookie sheets ....

Can I have my roller bearings back ?!?