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Cracked S block
Posted: Thu Apr 14, 2011 1:03 pm
by andy1071
I have been looking at a few 1071 S blocks, and it seems quite common that they crack horizontally along the block, between the tappet chest and cylinders.
Has anyone else come across this? Or am I just lucky
-It did seem that they were cracked in-line with the end of the machining from the cam follower bores. -Makes me think that I will carefully blend out these areas when I come to build my engine.
/Andrew
Re: Cracked S block
Posted: Thu Apr 14, 2011 2:38 pm
by dutchacme
I know of a 1293 race engine for a german historic racer which cracked during a dyno session in the same way. The crack was not noticed, once in the car the mechanic expereinced a mysterious water loss. A devil to find.
wim
970 racer
Re: Cracked S block
Posted: Thu Apr 14, 2011 7:45 pm
by Toby
Any pics of the cracks Andy? Will have to check my block as well then
Re: Cracked S block
Posted: Fri Apr 15, 2011 8:02 am
by andy1071
Sorry no pictures, I'm afraid.
The worst one was cracked from side to side (cylinder 1 to cylinder 4) more or less in the middle of the tappet chest. -It was very obvious
I have also seen cracks around the threaded boss for the tappet cover bolt (as though somebody had over tightened the cover bolt -it must of been REALLY tight!)
Re: Cracked S block
Posted: Tue Apr 19, 2011 7:32 am
by 251 ENG
May be something to do with your cold weather
Re: Cracked S block
Posted: Tue Apr 19, 2011 9:56 am
by andy1071
It's lovely weather over here in sunny Sweden (well, today anyway....)