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68Rusty
PostPosted: Wed Dec 12, 2012 7:40 pm 
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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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drmini in aust
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PostPosted: 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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68Rusty
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PostPosted: 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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drmini in aust
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PostPosted: Wed Dec 12, 2012 8:26 pm 
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what head are you using

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68Rusty
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PostPosted: 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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drmini in aust
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PostPosted: 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. :wink:

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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68Rusty
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PostPosted: 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.

Image

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drmini in aust
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PostPosted: 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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