Pressure Testing block

pablo · Post by **pablo** » Mon Aug 09, 2010 5:41 pm

Just want to know if it is possible to pressure a block.

gary@apt · Post by **gary@apt** » Mon Aug 09, 2010 7:49 pm

normally easy to see a failed part,blocks arnt like heads,

whats up?

Ian200sx · Post by **Ian200sx** » Mon Aug 09, 2010 8:16 pm

yes its possible, google it.
You were really unlucky to have a hole on a standard bore. I can't believe you'd get another 205 block on standard bore fail like that.

pablo · Post by **pablo** » Mon Aug 09, 2010 8:38 pm

gary@apt wrote:normally easy to see a failed part,blocks arnt like heads,

whats up?

We blew a small hole in one of the bores as soon as they were pressurised. Corrosion through the water jacket. The bores were spotless after honing not a mark showing. So would like to pressure test the next one before we build it up. Once bitten and all that.

gary@apt · Post by **gary@apt** » Mon Aug 09, 2010 8:40 pm

mate if you have rust causing a problem to a thin bore you have big issues!!

you much over std size??

pablo · Post by **pablo** » Mon Aug 09, 2010 8:42 pm

Ian200sx wrote:yes its possible, google it.
You were really unlucky to have a hole on a standard bore. I can't believe you'd get another 205 block on standard bore fail like that.

Sods law really and nobodys fault. Everything we did was doubled checked, after the bores were honed Gordon inspected them and so did I when I went over.

Bart · Post by **Bart** » Mon Aug 09, 2010 8:47 pm

gary@apt wrote:mate if you have rust causing a problem to a thin bore you have big issues!!

you much over std size??

its was only bored by 0.25 mate

gary@apt · Post by **gary@apt** » Mon Aug 09, 2010 8:48 pm

ive never had such issue even with rusty blocks in any jap stuff,is it something fords have had before?

pablo · Post by **pablo** » Mon Aug 09, 2010 9:06 pm

Even Gordon had not come across this before. We are srapping that block and starting again with another standard bore sized block. If they are bored out too mich they can become weak which is why we only went 0.25,

ScoobieWRX · Post by **ScoobieWRX** » Mon Aug 09, 2010 9:59 pm

It might be worth getting your next block acid dipped to remove any rust. At least that way you can inspect a spotless clean block and you can see if rust has ever been a problem or is likely to cause a problem. Then go though the job of a re-bore and all the rest of it. A borescope at this point might be a good idea to inspect inside the engine jacket once it's dipped.

Any automotive engineering company that machines will be able to pressure test your block, heads etc... There are a few around in your neck of the woods.

Good luck