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Author Topic: Part number ID required.  (Read 2057 times)
FB_MAD
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« on: February 18, 2008, 10:45:48 PM »
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Need an ID for a set of pistons I have here.

Stamped into top of piston is 7430515 and B9.

I've got a feeling they are standard HD 149 High Compression pistons however my '48 to HD GMH Master Parts Cattledog doesn't list the number nor does it give it as a superceded number.

Anyone know??

Cheers,

Terry.
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FB_MAD
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« Reply #1 on: March 05, 2008, 10:21:45 PM »
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Not having much luck here Undecided Undecided Undecided

Does anyone have a HR or HK GMH Master Parts book they could look up these piston numbers for me please.

Part number 7430515 ( same as in previous post) .

They are in a 149 which has a 3 7/16th bore and are flat top pistons with this number stamped into them and look to be genuine Holden pistons.

A standard 149 has 3 1/4 inch bore so they are a fair bit oversize.I suspect they are an oversize 161 piston ( hence the HR/HK parts book info request to search for the number ) and I am interested to see exactly what pistons they are.

From my calculations my 149 is around 167 cubes now with these pistons and 3 inch stroke.

Any constructive help appreciated,

Terry.
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fc4me
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« Reply #2 on: March 05, 2008, 10:46:27 PM »
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Hi my books got them down as HR 161 plus .040 hope it helps
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« Reply #3 on: March 05, 2008, 10:58:09 PM »
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Thanks for that FC4me, very much appreciated and confirms what I thought.

I'd say my 149 would have some very thin bore wall thickness after being overbored to fit 161 pistons in her but she's obviously happy as the rebore was  done by a previous owner a while back by the looks of it and its had some miles on it with those pistons by the looks and still runs OK.

Cheers,

Terry.
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