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OMG so shiny! · by **Dell'Orto** » Wed May 04, 2011 10:44 pm

Finally gotten around to measuring the main bearing journals after fitting ARP main studs to my gen 2 3SGTE...with an internal micrometer I come up with about .18mm out of round. Is this acceptable or do I need to get it align bored now?

no grip · by **Akane** » Thu May 05, 2011 12:04 am

manual in garage, do not want to grab it. Check BGB online?

by **Mr Ree** » Thu May 05, 2011 12:15 am

Ovality...what a great word

OMG so shiny! · by **Dell'Orto** » Thu May 05, 2011 12:24 am

Journals is also quite funny when you type it lots.

Kenny - where is the BGB?

no grip · by **Akane** » Thu May 05, 2011 1:21 am

Dell'Orto wrote:Journals is also quite funny when you type it lots.

Kenny - where is the BGB?

all over the webz says google

http://www.google.co.nz/search?q=mr2+bg ... =firefox-a

by **fivebob** » Thu May 05, 2011 3:44 pm

You don't usually measure the journals for OOR because they don't wear, it's the bearing shells that wear.

The cranks is what should be measured for OOR and the limit is ~ 0.02mm

by **Bazda** » Thu May 05, 2011 4:16 pm

Did you torque it up to toyota spec values or the ARP spec which is much more?

by **Burning Angel** » Thu May 05, 2011 4:56 pm

.18 seems huge to me, i assume you mean bearing housing rather than journal.

i would think you'd want it around 0.02-0.04mm

OMG so shiny! · by **Dell'Orto** » Thu May 05, 2011 7:20 pm

Bazda wrote:Did you torque it up to toyota spec values or the ARP spec which is much more?

ARP as per instructions. It does say in the instructions to check for ovality afterwards.
fivebob - ARP say to check the journals after torquing them up, as the studs pull them in much tighter.
And yes, .18 is huge according to an engine reconditioner today, will have to get it honed. Or flag studs and go back to bolts.

Decisions decisions.....

by **Bazda** » Thu May 05, 2011 8:16 pm

Torque it up to the stock specs.

I think ARP studs say something like 60ft lbs.

I usually do them up to 45-50ft lbs to keep the journal bore round.
Never had an issue doing this.

OMG so shiny! · by **Dell'Orto** » Thu May 05, 2011 8:32 pm

Oh yeah, could do...stock setting is only 58nm. Might try that tonight and see what happens

OMG so shiny! · by **Dell'Orto** » Tue May 10, 2011 12:14 am

So, flagged the studs, went back to the bolts...however, upon quadruple checking, number 2 is out of spec, by a reasonable margin. Is it safe to use a single .25 u/s bearing, or do I need to get the rest ground to match?

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Max journal ovality?

Max journal ovality?

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