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Home > Help Needed / General Tech Chat > marks on cam bearings

Toad

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27 Posts
Member #: 10162
Member

West Sussex

5th Jan, 2015 at 12:56:32pm

A couple of weeks ago I collected my block from the machine shop where I had some work done including the fitting of new cam bearings. This weekend after collecting all the parts I needed for the build, I was going to start assembling the engine. It was only when I was giving it the once over I noticed these marks on the cam bearings, what are your thoughts?
Sorry about the bad pictures.







Thanks in advance,


stevieturbo

3594 Posts
Member #: 655
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Northern Ireland

5th Jan, 2015 at 01:11:39pm

If there are any raised lumps, smooth them with some wet/dry

Then try the cam, if it turns smoothly I wouldnt worry about it

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will


Toad

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27 Posts
Member #: 10162
Member

West Sussex

5th Jan, 2015 at 01:30:53pm

Cheers, I don't remember feeling any lumps but I'll be to check again.

Thanks again


Joe C

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12307 Posts
Member #: 565
Carlos Fandango

Burnham-on-Crouch, Essex

5th Jan, 2015 at 01:56:38pm

as above, jsut check for tight spots. the cam should turn with finger and thumb.

On 28th Aug, 2011 Kean said:
At the risk of being sigged...

Joe, do you have a photo of your tool?



http://www.turbominis.co.uk/forums/index.p...9064&lastpost=1

https://joe1977.imgbb.com/



wil_h

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Betwix Harrogate and York

5th Jan, 2015 at 02:54:50pm

Nowt wrong with them

Fastest 998 mini in the world? 13.05 1/4 mile 106mph



On 2nd Jan, 2013 fastcarl said:
the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.


Toad

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27 Posts
Member #: 10162
Member

West Sussex

5th Jan, 2015 at 06:42:28pm

Thanks guys, I just wanted to make sure and get others opinions.


minimole23

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Wiltshire

5th Jan, 2015 at 08:29:37pm

Look good to me

On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding

slater

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Suffolk / Birmingham

5th Jan, 2015 at 09:05:10pm

Fitting cam bearings is good old fashioned 'fitting'.

Stick the cam in and see if it turns freely. If it does no problem, if its tight and you need more then your fingers to turn you need to get your bearing scraper out! You scrape the high spots on the bearings until it runs freely. Theres a bit of skill to it but not too hard. Hopefully the guy who fitted them has done it for you!

Turbo This..

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Previously josh4444

Australia, brisbane

6th Jan, 2015 at 10:18:59am

i had doubts about similar marks on mine was told it was fine so long as its nice and free and all seams well so far remember the cam only turns half crank speed so not that bad in reality

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