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Home > General Chat > Anyone seen this before ? cracked under centre main | |||||||
510 Posts Member #: 1592 Smart Guy! mainland europe near ze germans |
6th Oct, 2014 at 08:31:14pm
It is not mine, but was posted on a vintage race forum. As folks here have broken just about everything I thought it might be a good place to ask
That sir, is not rust, it is the progressive mass reduction system
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![]() 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
6th Oct, 2014 at 08:33:17pm
ah!
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/ |
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940 Posts Member #: 1424 Post Whore Carnforth, Lancs |
6th Oct, 2014 at 08:33:29pm
Presumably exactly why the blocks without that hole in the casting are in demand. |
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4309 Posts Member #: 1321 Post Whore Wiltshire |
6th Oct, 2014 at 08:36:44pm
Still a substantial piece of iron to crack. Always wondered if there was truth in the block failing round that area story. On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding |
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![]() 9812 Posts Member #: 332 Resident Cylinder Head Modifier Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem |
6th Oct, 2014 at 09:11:56pm
yes seen this a few times on hi output reving ......" none ballanced engine "
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![]() 2094 Posts Member #: 9894 Post Whore Dorking |
6th Oct, 2014 at 09:13:02pm
exactly why i'm looking for an A+ block! |
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510 Posts Member #: 1592 Smart Guy! mainland europe near ze germans |
6th Oct, 2014 at 09:25:45pm
I'm puzzled as to where the crack initiated.
That sir, is not rust, it is the progressive mass reduction system
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![]() 12307 Posts Member #: 565 Carlos Fandango Burnham-on-Crouch, Essex |
6th Oct, 2014 at 09:26:53pm
casting mark stress risers in that hole above the centre main,
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/ |
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![]() 270 Posts Member #: 69 Senior Member Coventry |
10th Oct, 2014 at 08:36:30am
crack will start from a rough spot, some flashing, and then propagate for some time, probably before even it was tuned, grinding it all smooth and polishing it stops it starting but on a 35 year plus block not worth the effort if it was prone to it then it will have initiated by now and grinding polishing once it has started wont help at all.. |
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![]() 5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
10th Oct, 2014 at 02:33:55pm
I agree that if the crack has already initiated it may be pointless trying to prevent it propagating - too much metal may have to be removed to get to the end of it which just weakens things further - but don't assume all early blocks will have had the crack initiate.
Schrödinger's cat - so which one am I ??? |
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![]() 11046 Posts Member #: 965 Post Whore Preston On The Brook |
10th Oct, 2014 at 07:37:21pm
The hole is not all bad. There is a certain profesional engine builder that introduces holes like that for a specific reason. They are the fastest engines on the grid!
On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be... So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'... On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........ |
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![]() 16540 Posts Member #: 4241 King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner Rotherham, South Yorkshire |
10th Oct, 2014 at 07:59:30pm
DP On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it ![]() |
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![]() 270 Posts Member #: 69 Senior Member Coventry |
15th Oct, 2014 at 04:05:53pm
you know you want to google it but not on a work PC. Agreed hole lightening all good but foundrymen at morris works didnt go for a high class casting in that area hence the issue, its the rough finish/sand inclusions that cause the problem.. |
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