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Old 6th January 2016, 08:44 AM   #1 (permalink)
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cracked engine block

Have been looking over my engine block getting ready to build up and have found a crack on one of the water ports to the stud hole. Will I get away with this or is the block scrap ?
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Old 8th January 2016, 11:00 AM   #2 (permalink)
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Hi Mark

If it was me, personally i wouldn't risk it. It would always be in the back of your mind if you were to use the block.
you can pick blocks up from many traders on here for a relatively small amount, if you get the option go for an early R32 GTR block as they do not go porous as the casting process was different and stronger.

Regards James
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Old 8th January 2016, 11:24 AM   #3 (permalink)
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^^^ definitely 100%

you can't expect a good build on shoddy foundations
also you cant tell how deep the crack goes, at the very least it's a stress point and won't get any better

sort the problem now while it's all out in front of you rather than having to tear it all down again later when it causes problems. Probably cheaper in the long run too.
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Old 8th January 2016, 01:54 PM   #4 (permalink)
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i would not risk build this engine and after the first full throttle you have a probleme,
then you have to do the same job again
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Old 8th January 2016, 02:09 PM   #5 (permalink)
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Couple of blocks in the for sale section worth a look....

And mod the oil gallery on the head while you're at it...I got stung with that one once which really annoyed me as the engine had been apart once in its life already.
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Old 11th January 2016, 09:23 PM   #6 (permalink)
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I was wanting to build the block to stand 1000 just so then I know it will cope if I ever wanted more. Am thinking in mined just to get a full built engine and strip that down .. but then that may have a crack . It was a full built bottom end and its all scrap know

Have just striped the head ready to fit a oil drain in the back and fitting new cams valve springs and may be valves .. Not shore what standard valves take ?
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Old 10th April 2017, 09:32 AM   #7 (permalink)
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Quote:
Originally Posted by Jayman View Post
Hi Mark

If it was me, personally i wouldn't risk it. It would always be in the back of your mind if you were to use the block.
you can pick blocks up from many traders on here for a relatively small amount, if you get the option go for an early R32 GTR block as they do not go porous as the casting process was different and stronger.

Regards James
Sorry to hijack this thread but in relation to this, how can you identify which version the block is? Is it certain part numbers? Where are the numbers printed?
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Old 10th April 2017, 11:14 AM   #8 (permalink)
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code is cast on the block

OSU - Standard
24U - Stronger N1 block which can also be bought seperately


For completeness there is also a RRR Block which is the strogest but these cost really silly money (if you can find one)
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Old 10th April 2017, 11:29 AM   #9 (permalink)
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Anyone got a link to a thread that shows how to go about doing the 'oil gallery' mod as mentioned by Alex C? I'had a good search and come up short with any solid info on this.
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Old 10th April 2017, 05:01 PM   #10 (permalink)
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Oil mods

https://youtu.be/E1sacK_wCio

https://youtu.be/M_3prtDBQOc
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Old 11th April 2017, 12:04 AM   #11 (permalink)
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Couple of interesting vids there thanks , but i'm really looking for info on the mod where an external line is routed around the head to circumnavigate the internal water/oil ways, due to a crack developing?
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