105 series 1HZ Big End Bearings

Hi David
Dont know if there any different ,but i can remember changing the bearings in a 60 series petrol engine a few years ago , each bearing was actually a different size, wouldnt have known this only the fella that sold me the bearings told me , so if i were you i'd make a few enquiries first .......cheers .....DAVE

Hi David
Firstly, are the numbers you are talking about on the bearing shells or are they on the caps and rods?
The factory fitted shells are are selective fit and may have a range of numbers on them, from 1 though to 9 I think.
The after market shells are a standard and about middle of the selective range.
This will not be a problem.
The numbers on the rods and caps if any should match. Do not mix them up.
Ray

Hi David,
Not sure of your methods & I hope I am not advocating how to suck eggs but here is my $2 worth! are you checking the journal diameters of each throw on the crank & mains as well with a micrometer and compare to OEM specs or the last known grind size and the closed bore of each big end & main without bearing sleeves.!. You will probably find a range of dimensions by comparison.
There are upper & lower limits of journal sizes & bearing housing bores & the accepted degrees of ovality also. There is an upper & lower limit to ultimate clearances and excessive clearances are not worth the effort as subsequent short life is invited.
As you may know there are undersize bearings for a re-ground crank & big ends & mains can be closed & honed. Cranks should also have deflection readings done to establish correct axial alignment.
cheers

The original ones are slightly different or graded and are minute differences in sizes. If you buy genuine you ask for these individual sizes. Sounds like you have aftermarket ones which are all the same size but should not make a difference. Just curious as to why you are changing them anyway. You should have to change them for hundreds of thousands of kilometres if the vehicle has been serviced corectly. If you are replacing them because a knock has developed I would be measuring up corectly each journal as there may be some more damage to consider.

The numbers on the bearing correspond to thousanths of a millimeter difference in diameter on the crank journals....my recommendation to you is pull them carefully, clean and look at them, put back in...and if you have removed the harmonic balancer to drop the crank, work out a way to do the nut back up to 540nm......you will need a balancer holder, and a 2 meter length of pipe to do it correctly.....they have a tendancy of falling off if you dont do it back up tight...tight tight.
This is usually followed by much folding stuff leaving your account, as the crank nose wears away
Andrew