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+--- Thread: Scrap block? (/showthread.php?tid=3847)
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Scrap block? - Howard Wright - 03-02-2020
Hi All
I thought I’d got quite a good block for the special and have gone ahead with a light skim and rebore.
However now I’ve got it home I have found this crack emanating from the centre stud hole to the water passage. It looks quite old in that the edges are slightly corroded so it’s probably been there for some time. There are no cracks between the stud and the cylinders which have been bored to 57.25mm in preparation for Tony’s slipper pistons.
I will be using a standard cam and valve springs but a Ricardo head.
Is the block Scrap? Or is it worth chancing it given the lack of cracks to the cylinders?
Cheers
Howard
RE: Scrap block? - leaf200 - 03-02-2020
Hi,
I would challenge you to find a block without a crack there.
It will be fine
RE: Scrap block? - Howard Wright - 03-02-2020
Hi Leaf
Phew! thanks for that, having just forked out on the rebore I was a bit anxious!
Cheers
Howard
RE: Scrap block? - steve anderson - 03-02-2020
You can get it repaired , mine was the same , been repaired for years of hard racing , no problem .. STEVE
RE: Scrap block? - Chris KC - 03-02-2020
This question has been aired before on the forum and I think the consensus was
- if you have a block that isn't cracked, use that one
- but plenty of people are driving around with cracks here
- probably only cause for concern if it starts heading for the bores; and then only if unlined.
RE: Scrap block? - Terrytuned - 03-02-2020
Howard don't worry my block has the same crack and has not got any worse in 20yrs of competition a rebore and several sets of pistons. When fitting the head gasket seal with a thin coat of Loctite copper silicon gasket sealer and you won't have a problem. Terry.
RE: Scrap block? - Zetomagneto - 03-02-2020
Hi Howard, I agree will all other posters on this one.most blocks I have seen are cracked in that position, I wouldn't bother getting it repaired.
Gene
RE: Scrap block? - Howard Wright - 03-02-2020
Thanks Everyone
I’m mighty reassured. Strange I’ve built two engines before and neither had a crack in the block like that. Must have been very lucky
.Cheers
Howard
RE: Scrap block? - Tony Betts - 03-02-2020
hi howard.
it scrap, throw it away.
ONLY KIDDING.
ive just got back in from collecting 7 reconditioned blocks from steve flake.
and i can remember seeing at least 5 are cracked in the same place.
ive been getting blocks reconditioned for my customers for nearly 30 years now. and yes most blocks have this crack.
none of them had further problems.
what i would do though, as the block is freshly bored. is to check the bores again after a week. to see if there are any poorus spots half way down the bores. they come up as little black dots.
porocity can come through at any bore size, and isnt always obvious when the bores are freshly bored, and nice and shinny.
i dont say this to worry you. its just easier to do any checks before an engine goes together. rather than second guessing when something goes wrong.
tony
RE: Scrap block? - David Witton - 03-02-2020
Howard, FWIW, I had a similar crack repaired by Surelock Castings. Various Austin sages advised against wasting my money. Nevertheless it was repaired about 10 years ago and is still holding out.