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 Posted: May 13, 2017 08:46PM
Total posts: 8611
Last post: May 14, 2017
Member since:Oct 27, 2000

Should anybody need them, I have some stock of NOS 998-1098 cam bearings in -.010" and -.020" journal sizes.
New in BMC boxes.

Price AUS$50/set, + postage. AFAIK, these undersize ones are NLA now.

Kevin G

1360 power- Morris 1300 auto block, S crank & rods, Russell Engineering RE282 sprint cam, over 125HP at crank, 86.6HP at the wheels @7000+.

 Posted: May 13, 2017 08:24PM
TK
Total posts: 1043
Last post: May 13, 2017
Member since:May 13, 2002
Make sure that they are fitted correctly, you don't want a rocker cover full of oil. :)

 Posted: May 13, 2017 02:12PM
Total posts: 8611
Last post: May 14, 2017
Member since:Oct 27, 2000
Quote:
Originally Posted by velopackrat
Isn't yours a small bore motor?  The small bore bearings are different but maybe only the third bearing on the cam gear end is larger?
I can measure 1275 bearings if it helps.
The 1275 third bearing is same diameters but wider. You can use the small bore one in a 1275 if you press it flush with inside of block. 1275 auto blocks use this bearing as their oil pump recess is deeper.
Full circle bearings are easier to fit than the cut edge ones. The latter are easily damaged during assembly.
I take mine to my local engine builder (Graham Russell), he has the correct mandrels to fit them.

Kevin G

1360 power- Morris 1300 auto block, S crank & rods, Russell Engineering RE282 sprint cam, over 125HP at crank, 86.6HP at the wheels @7000+.

 Posted: May 10, 2017 02:26PM
Total posts: 41
Last post: May 29, 2017
Member since:Jul 25, 2016
No worries - I got them all out. 1 1/4", 1 1/2" and 1 3/4".  The threaded rod worked great with the right size fender washers but I had to get a bit medieval on the back one to start it moving. Yes it is a small bore (MG1100) motor.
I also took a micrometer to my mains and big end bearings and all are in spec for +020".
Time to put the parts orders in. It is a bit of a pain that not all the parts I need are available in one place but at least they are available
Thanks for your help,
Steve

 Posted: May 10, 2017 01:39PM
Total posts: 216
Last post: May 12, 2017
Member since:Jun 26, 2012
US
Isn't yours a small bore motor?  The small bore bearings are different but maybe only the third bearing on the cam gear end is larger?
I can measure 1275 bearings if it helps.

 Posted: May 10, 2017 12:05PM
Total posts: 41
Last post: May 29, 2017
Member since:Jul 25, 2016
I have rigged up a decent pull/push tool to get them out but my problem is finding the correct sized washers/sockets to fit over the bearing. Any idea what the sizes are?
Steve

 Posted: May 10, 2017 11:47AM
Total posts: 216
Last post: May 12, 2017
Member since:Jun 26, 2012
US
Hi Steve,

It's possible to MacGyver up some cam bearing pullers with all-thread, sockets, washers, chunks of tailpipe tubing, etc.  And I've done this with success.  Seriously, I made my pullers on my lathe...  

But if you have a local machine shop, call them for a quote first.  Much less pain to haul the block to them with the new bearings and camshaft, have them do the work and be done with it.

BTW, kudos to you for diving in and doing your motor and gearbox!

 Posted: May 10, 2017 11:31AM
Total posts: 41
Last post: May 29, 2017
Member since:Jul 25, 2016
One of my cam bearings looked worn so I decided to replace the three of them. I did manage to get the center one out with a lot of applied violence which destroyed the bearing but left the housing unmarked. Is there a special tool for bearing removal or is it destruction? I plan to press the new ones in using a steel plate and handy harmonic balancer removal tool after freezing the new shells overnight.

I have not yet ordered the bearings - any comment on full circle Vs. the "open" type

Many thanks for your help
Steve