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| Imp piston 1275 head gasket? https://www.ausmini.com/forums/viewtopic.php?f=2&t=79523 |
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| Author: | 68Rusty [ Wed Dec 12, 2012 7:40 pm ] |
| Post subject: | Imp piston 1275 head gasket? |
Anyone know which head gasket I can use for this? I need to run 2 of them to allow valve clearance. The 1275 gasket I have doesn't line up correctly with the far water jacket ports, everything else seems fine just two water jacket ports. I have been thinking of getting some copper and water cutting one the thickness I want to? Any experience here appreciated 
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| Author: | drmini in aust [ Wed Dec 12, 2012 8:07 pm ] |
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A 1275 gasket lines up OK if you use a 1275 head, as you say it won't work on a smallbore head. If I were you I'd try 2x ACL Monotorque gaskets first, they have a pretty good fire ring and might work OK. Back in the 60s when we used to bore 1098s to 66.5mm, a smallbore gasket worked OK. |
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| Author: | 68Rusty [ Wed Dec 12, 2012 8:19 pm ] |
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drmini in aust wrote: A 1275 gasket lines up OK if you use a 1275 head, as you say it won't work on a smallbore head.
If I were you I'd try 2x ACL Monotorque gaskets first, they have a pretty good fire ring and might work OK. Back in the 60s when we used to bore 1098s to 66.5mm, a smallbore gasket worked OK. Thanks Kevin, It seemed that two of the water ports in the block didn't line up properly with the 1275 head gasket? I only quickly had a look tonight but I will look again and maybe take a photo to explain what I am looking at. |
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| Author: | drmini in aust [ Wed Dec 12, 2012 8:26 pm ] |
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what head are you using |
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| Author: | 68Rusty [ Wed Dec 12, 2012 9:13 pm ] |
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drmini in aust wrote: what head are you using
1100s 12G940 with cooper S exhaust valves. |
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| Author: | drmini in aust [ Wed Dec 12, 2012 9:32 pm ] |
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1275 gasket should work fine then, as not all the water holes at the ends in the smallbore block are used with the 1275 head. 
Just check how the gasket sits over the row of small holes along the front of the block. Sometimes they need plugging and redrilling smaller. |
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| Author: | 68Rusty [ Fri Dec 14, 2012 4:22 pm ] |
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This is how it looks placed on block. All the front holes appear to line up ok. 
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| Author: | drmini in aust [ Fri Dec 14, 2012 4:50 pm ] |
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Put the 2 studs in that locate the gasket (there's 2 holes are smaller) and have another look. If you are then still worried about that water hole in the block, take a round file to chamfer it, or touch it with a die grinder. |
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