Hi i have this 1275 head that was given to me but not sure if its fixable. Below is a photo of the two grooves on the exhaust side. Could a machine shop fix this?
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| Is this head repairable? https://www.ausmini.com/forums/viewtopic.php?f=2&t=80516 |
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| Author: | 1380 K [ Thu Feb 28, 2013 7:55 pm ] |
| Post subject: | Is this head repairable? |
Hi i have this 1275 head that was given to me but not sure if its fixable. Below is a photo of the two grooves on the exhaust side. Could a machine shop fix this?
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| Author: | Kennomini [ Thu Feb 28, 2013 8:42 pm ] |
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I don't know much about heads but to me it looks like the exhaust is missing it's insert, maybe those two groves were how they removed the insert... |
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| Author: | TheMiniMan [ Thu Feb 28, 2013 8:53 pm ] |
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I`d say the insert came loose & was smashed into the chamber to make the dents & yes i`d reckon that`s an easy fix the inserts these days differ from the old days, so maybe a little more interferance-fit will make it stay in there |
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| Author: | drmini in aust [ Thu Feb 28, 2013 9:01 pm ] |
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Yep it's fixable, just make or choose an oversized insert. I once had an inlet port seat on an old 12G1316 head rusted right out in 1 spot, was grooved about 2mm deep (had been sitting around outside somewhere, with water in). I made a BIG insert from 4140 to suit, machined the head out and GR shrink fitted it. All good. |
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| Author: | 1380 K [ Thu Feb 28, 2013 9:13 pm ] |
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Awesome. Cheers guys |
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| Author: | goodie [ Wed Mar 06, 2013 11:14 am ] |
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What about this one Matt , Doc  
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| Author: | drmini in aust [ Wed Mar 06, 2013 11:20 am ] |
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It is worth a go, put it on a mill and bore the exhaust side out until cleaned up- then select/make an insert & fit it. Then, recut all the the inlet seats for M2S valves. Where the chamber has been nibbled away could be filled up with some nickel bronze (gas welded when hot, before fitting the insert). [edit] whether worth all this attention though is a moot point, as I just sold a good bare 940 head for $150. Here's the one I prepared earlier.... I got the head for nix because the PO thought it was terminal. You can see the BIG inlet insert on #3, 2nd from left. 
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| Author: | GR [ Wed Mar 06, 2013 7:34 pm ] |
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HI 1380K /Goodie 998 Both heads can be fixed eazy.i just fixed one that had droped a valve that had a lot more damage that, if you want them fixed give me a ring. Graham Russell |
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| Author: | 1380 K [ Wed Mar 06, 2013 7:49 pm ] |
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Hi graham. I plan to get this one done by you, just saving up some money. Your machining me up a inlet for my hif ATM. |
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| Author: | goodie [ Wed Mar 06, 2013 9:41 pm ] |
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Sorry to hog your thread 1380 K , but i thought i'd throw mine in here as a comparison. I was given this head when my brother picked up a Torana off a bloke , i didn't take too much notice at first , but then had a better look at and thought it was cactus. I have hung onto it rather than just toss it , i suppose hoping that someone might tell me it was repairable . Thanks for your input Doc & GR , handy to know that it is salvageable . |
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| Author: | simon k [ Thu Mar 07, 2013 12:39 pm ] |
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how about this one? it's my MK2 S head 
that's the rest of the valve sitting in the guide there... 
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| Author: | 1380 K [ Thu Mar 07, 2013 12:45 pm ] |
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No worries goodie |
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| Author: | drmini in aust [ Thu Mar 07, 2013 1:19 pm ] |
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simon k wrote: how about this one? it's my MK2 S head
that's the rest of the valve sitting in the guide there... I've seen GR fix much worse damage than that. 
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