What bearings do I need. ?

FROSTY Insano Dub Head

744 posts · joined May 2009 · 6 Jun 2010, 3:48 pm

#783208

I pulled down my 1776 to find the slight knock (one of the rod bolts loose) so i have pulled the rest of it apart and just some normal (little) wear to the bearings so while its down I'm going to replace them without a machine, but what size?
Crank mains measure 54.70mm (+/- .01 on the three)
Crank Rods 54.70mm on all four
Case Mains measure 65.92mm ( no pounding on center main)
Thanks
Jason

matberry Moderator Go hard or go home

8,114 posts · joined Mar 2006 · 6 Jun 2010, 9:02 pm

#783321

Mate.....what are you measuring with???

Basically, the mains on the ID (crank) go down in .25mm increments, on the OD (case or back), go up in .5mm increments, rod journals are the same as main journals, .25mm increments.

So your 54.70 is probably 54.75 (1st undersize), and 65.92 must be 66mm which is +1mm on the back.

If this is correct, your after, mains; +1, -.25 and big end are -.25.

Hope this helps. 🙂

Matt Berry Motorsports...air cooled advice, repairs and mods Ph 0408 704 662
OFF-ROAD,CIRCUIT,DRAG,STREET,ENDURANCE

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 · 7 Jun 2010, 8:05 am

#783360

so while its down I'm going to replace them without a machine, but what size?

you just carnt simply replace the bearings without a measure

what if the crank is out of round or on max wear size

you will be wasting yr time effort and money

I read it on FACEBOOK so it must be true

http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630

http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099

http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603

http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409

dangerous 23 Windows of Awesome

5,901 posts · joined Jan 2005 · 7 Jun 2010, 3:11 pm

#783411

Bring your crank and rods over dude, and i will measure for you.

westi wrote:That's mad Alan.

FROSTY Insano Dub Head

744 posts · joined May 2009 · 7 Jun 2010, 5:00 pm

#783424

Thanks Matt, i think i was sqeezing the calipers too hard when reading them. Better still I'll drop over to Dave's to sort out.

Hey Dave, I'll pick up the guards too.

grumble Son of Jim - Creator of Good

2,672 posts · joined Jun 2008 · 7 Jun 2010, 8:18 pm

#783470

Good decision.My opinion is that this is what the forum is about.ie helping each other. good luck.Cheers Les

dangerous 23 Windows of Awesome

5,901 posts · joined Jan 2005 · 8 Jun 2010, 5:23 am

#783528

FROSTY wrote:Thanks Matt, i think i was sqeezing the calipers too hard when reading them. Better still I'll drop over to Dave's to sort out.

Hey Dave, I'll pick up the guards too.

See you then.

westi wrote:That's mad Alan.

FROSTY Insano Dub Head

744 posts · joined May 2009 · 9 Jun 2010, 4:00 pm

#783804

Yep, needs a re-grind, I was hoping to do the cheap fix but not to be. I will have to wait till July 1st and get the tax return done fast.

vw54 Administrator Always Waiting 4 Friday

16,723 posts · joined Aug 2002 · 9 Jun 2010, 7:09 pm

#783842

I was hoping to do the cheap fix but not to be.

Volkswagen n the word CHEAP dont mix

I am glad u didnt waste money just putting bearings in n not measuring on yar muffin man

I read it on FACEBOOK so it must be true

http://forums.aussieveedubbers.com/viewtopic.php?tid=91278&page=1#pid848630

http://forums.aussieveedubbers.com/viewtopic.php?tid=63561&page=1#pid624099

http://forums.aussieveedubbers.com/viewtopic.php?tid=4832&page=1#pid452603

http://forums.aussieveedubbers.com/viewtopic.php?tid=60650&page=1#pid574409