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| Whats a crack test worth? https://www.ausmini.com/forums/viewtopic.php?f=2&t=90429 |
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| Author: | simonw [ Wed Sep 02, 2015 7:40 pm ] |
| Post subject: | Whats a crack test worth? |
Going to need a crank or 2 tested and wanted to know the average rate. Also is it possible to test a block to see how close the water jacket comes to the bore? this is with reference to offset boring and finding an appropriate block.... am i barking up the wrong tree..? Many thanks |
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| Author: | 69k1100 [ Wed Sep 02, 2015 7:55 pm ] |
| Post subject: | Re: Whats a crack test worth? |
I was quoted 50 here in Adelaide but I think that included hot tanking so possibly a little cheaper if your cranks are shiney and clean? AFIK you can x-ray blocks in the hunt for cracks and wall thickness but I have no idea who can carry out this sort of work for you. |
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| Author: | drmini in aust [ Wed Sep 02, 2015 7:59 pm ] |
| Post subject: | Re: Whats a crack test worth? |
My local crank grinder charged $50 last time. I think his is a black light fluorescent method. There are other methods: 1. a `ping' test. Stand crank on end on the floor and tap the top and 2 middle webs sharply with a small spanner. Each should `ring' for a few seconds. Turn crank on end and do the other one. If it sounds flat, it's probably cracked next to that web. I have someone's 1098 crank with this problem. 2. Dyecheck test (Rocol): a. Spray crank all over with step 1 cleaner. Wipe dry with clean rag. b. Spray crankpins and mains with step 2 red dye. Leave sit for 10 mins or so. Hose off and dry. c. Spray crankpins and mains with step 3 white powder/developer. Let dry, couple of minutes. Any cracks will show as red lines in the white powder. This test is pretty good. It confirmed the cracked crank mentioned above. |
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| Author: | simonw [ Thu Sep 03, 2015 10:00 am ] |
| Post subject: | Re: Whats a crack test worth? |
Thanks doc and 69 .. Will see what the local uses and charges . |
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| Author: | TK [ Thu Sep 03, 2015 10:59 am ] |
| Post subject: | Re: Whats a crack test worth? |
http://www.chiltonengineering.com.au/ |
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| Author: | simonw [ Thu Sep 03, 2015 11:03 am ] |
| Post subject: | Whats a crack test worth? |
Thanks TK , I know dave does engineering work ... Just haven't asked him yet haha ! |
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| Author: | simonw [ Thu Sep 03, 2015 11:04 am ] |
| Post subject: | Re: Whats a crack test worth? |
What have you have you done there |
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| Author: | MG Rocket [ Thu Sep 03, 2015 11:06 am ] |
| Post subject: | Re: Whats a crack test worth? |
I think I paid about $75 for a mini crank. I think the process was called Magnaflux. |
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| Author: | TK [ Thu Sep 03, 2015 12:15 pm ] |
| Post subject: | Re: Whats a crack test worth? |
Crank crack tests, block boring. Dave is very knowledgable. He knows Minis. Top bloke. |
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