[Supras] Bare bones NA from hell

Mon Oct 15 11:43:01 CDT 2007

Alright here is the breakdown and the numbers for the bearing id.  First off the bearing should have a # on the outside but if you have the same case as I did you cannot read this #.  So use the #s on the crank and rod to determine what bearings you need.  There will be numbers on the crank on the counter weight and numbers on the rod cap on side near bolt.  The ones on crank will be either 0, 1 or 2, on the rod it will be 1 2 or 3.  now there are 2 sets of #s on the crank there will be a set of 7 and a set of 6 the 6 are the rod bearings teh 7 are the crank bearings.  Add the #s together for each rod beaing an refrence chart.  You can also use the chart to get the # you need as you have to order according to bearing # not size, except oversize. Hopefully this chart does not get scewed in transfer.

Mark      /     Big end inner diameter     /crank pin diameter     /  Bearing center wall thickness
0          /                -                       / 60.007-60.012       /                  -
1          /          64.024-64.036           / 60.001-60.006        /     1.988-1.991
2          /          64.031-64.042           / 59.994-60.000        /     1.992-1.994
3          /          64.037-64.042           /         -                  /     1.995-1.997    
4          /               -                        /         -                  /     1.998-2.000
5          /               -                        /         -                  /     2.001-2.003
os .25   /          64.022-64.064           /   59.730-59.740      /     2.123-2.133

I also have the crank specs and thrust bearing and better pics of where marks are but will need to email them to anyone who needs them.  You should plastigage all bearing to make sure there is no clearance and add that to bearing thickness to double check.
Also if i rember correctly the block has the #s to add to the crank # on the block for main bearings, the ones for bearing 1-4 are between cyls 1 and 2 on the oil pan mating surface on the block and 5-7 are between cyls 4 and 5.  Email me if you need more info.

> From: supras-request at supras.com> Subject: Supras Digest, Vol 47, Issue 14> To: supras at supras.com> Date: Sat, 13 Oct 2007 12:00:00 -0500> > Send Supras mailing list submissions to> supras at supras.com> > To subscribe or unsubscribe via the World Wide Web, visit> http://supras.com/mailman/listinfo/supras_supras.com> or, via email, send a message with subject or body 'help' to> supras-request at supras.com> > You can reach the person managing the list at> supras-owner at supras.com> > When replying, please edit your Subject line so it is more specific> than "Re: Contents of Supras digest..."> > > Today's Topics:> > 1. Bare bones NA from hell (Bill)> > > ----------------------------------------------------------------------> > Message: 1> Date: Fri, 12 Oct 2007 19:08:49 -0400> From: "Bill" <bwright1818 at comcast.net>> Subject: [Supras] Bare bones NA from hell> To: <supras at supras.com>> Message-ID: <000f01c80d24$d989f560$6401a8c0 at paulaxp>> Content-Type: text/plain; charset="iso-8859-1"> > Well, my little buddy the '90 NA engine has been taken apart down to the bare block. Guess I have to do some reading about how Toyota does main and crank bearings. All I know is American; but I have a rough idea of the difference, from Yamaha outboards.> > The head came back from the machine shop with a BEAUTIFUL finish. They said they had to remove .023", because not only was the previous finish done with a belt sander, there was a deeper crevice where the same someone had tried to remove more stock with a wheel of some sort.> > Now the block is there, too, to be decked. It has erosion from blow-by around the gasket's fire rings.> > Found a screwdriver hole though the front seal. Five correct flywheel bolts plus one odd ball. Bent belt tensioner pulley. Bent pulley bracket. Two broken piston rings, yet no ridge. Does anyone know how they might identify oversize bores and pistons? Might be a reman engine. There are a lot of weird numbers stamped on the deck and oil pan gasket surfaces. All "twos." Thanks for your support (and sympathy. Ha ha.)> > Bill> > > > ------------------------------> > _______________________________________________> Supras mailing list> Supras at supras.com> http://supras.com/mailman/listinfo/supras_supras.com> > > End of Supras Digest, Vol 47, Issue 14> **************************************
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