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CamZH
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Toodyay, WA
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July 2002
 
Main Bearing wear Mon, 13 January 2003 07:55 Go to next message
Hey Guys,
i decided to have a little look see at the 18R-GU while its out...
the main bearings look pretty good to me...
opinions?
http://members.optushome.com.au/manjuice/main%20cap.jpg
http://members.optushome.com.au/manjuice/main%20journal.jpg

thanks,
CamZH
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ed_ma61
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Lost in the K hole
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May 2002
Re: Main Bearing wear Tue, 14 January 2003 02:37 Go to previous messageGo to next message
looks good, but i'd be wanting to mic the whole lot anyway

cheers
ed
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Jason
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Canberra
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December 2002
   
Re: Main Bearing wear Tue, 14 January 2003 04:47 Go to previous messageGo to next message
Looks good Cam, how many k's has that engine done?
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CamZH
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July 2002
 
Re: Main Bearing wear Tue, 14 January 2003 08:10 Go to previous messageGo to next message
Quote:

looks good, but i'd be wanting to mic the whole lot anyway



WTF does that mean??

Jason, i have no idea how many K's its done.
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gianttomato
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Re: Main Bearing wear Tue, 14 January 2003 09:55 Go to previous messageGo to next message
It means he'd like to measure it all and make sure it's all within tolerances.
The bearing (photo 1) looks brand new. I presume photo 2 is the crank journal. There appear to be grooves on the journal....this might just be oil or it may be an actual groove/ridge. If the latter is the case then the crank needs to be machined. If you can feel it, it needs to be ground - you'll need new undersize bearings.
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CamZH
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Re: Main Bearing wear Tue, 14 January 2003 10:17 Go to previous messageGo to next message
Hi GT,
the journal feels very smooth.
I have only taken this 1 cap off.

CamZH
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gianttomato
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Re: Main Bearing wear Tue, 14 January 2003 11:11 Go to previous messageGo to next message
Ok that's good. Last thing you might want to do is check the clearances with a bit of Plastguage. Remember to remove all traces of the Plastiguage before reassembling the motor.
Cheers Dave.
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allencr
Regular


Location:
tallahassee FL usOFa
Registered:
May 2002
Re: Main Bearing wear Tue, 14 January 2003 20:44 Go to previous messageGo to next message
IMHO i think gianttomato's got it right - it's a new bearing - never been run or run very little.
look at those flakes around the dowel in the block - next to the locating tab - i believe those are from pushing the new insert in and to top it off, they didn't even clean up before bolting the cap back on. those flakes are crushed & flattened right? it wouldn't have lasted very long!!

"mic" - short for micrometer

****************
CamZH, the flat surface on the block that the caps are bolted on in the second picture, the surface that HAS TO BE perfectly flat & clean- those shiny spots that are around the bolt hole look to me like bits that have been scraped off of the back of the bearing. i've only gotten them when i've replaced bearings with the crank in place/not removed.

i can be wrong!


[Updated on: Thu, 16 January 2003 15:15]

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Rala
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Location:
Perth, WA
Registered:
October 2002
 
Re: Main Bearing wear Wed, 15 January 2003 01:18 Go to previous messageGo to next message
Hey guys,
this motor was running... so its not a brand new bearing...

I dont really understand what your talking about with those flakes...

CamZH
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CamZH
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I supported Toymods

Location:
Toodyay, WA
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July 2002
 
Re: Main Bearing wear Wed, 15 January 2003 01:19 Go to previous messageGo to next message
ack!
i've done it again!

*note to self* Look at who is logged in next time! Freak

CamZH
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allencr
Regular


Location:
tallahassee FL usOFa
Registered:
May 2002
Re: Main Bearing wear Thu, 16 January 2003 15:33 Go to previous message
x
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