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andrew stephenson Offline
#1 Posted : Thursday, 5 January 2012 7:49:18 PM(UTC)
andrew stephenson

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COULD ANY ONE HELP TO ID A CRANK I THINK IT MAY BE STEEL.
PART NO 742000 STAMPED ON IT THANKS ANDREW
adam PERTH Offline
#2 Posted : Friday, 6 January 2012 12:08:56 AM(UTC)
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dunno about part numbers, but look at the crank snout, if its been ground down from factory its cast, steel ones ahave a thin line.

also hit it with a steel object, if it resonates for a long time with a high pitched frequency its a steel crank.
Old holdens brought on the spot, quick decision, cash paid.
greenhj Offline
#3 Posted : Friday, 6 January 2012 3:00:56 AM(UTC)
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was there ever a steel 308/304 crank?




11.34@121mph NA
now being rebuilt with less cam, much less comp, and enough turbo to smash a holden block to bits..
petaus Offline
#4 Posted : Friday, 6 January 2012 3:54:20 AM(UTC)
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it,s the other way aroun steel has a wide forged line, cast is normally a thin parting line, i think the 308 were nodular cast iron.
castellan Offline
#5 Posted : Friday, 6 January 2012 4:27:22 AM(UTC)
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Well my early E189 18/5/69 308 HP crank rang like a bell with a lighter colour to the HQ 308 crank, the HP rods same colour as the crank and had massive forging lines, don't think the crank was steel but it must be like the 351 crank in the HO as it is supposed to ring as well.
andrew stephenson Offline
#6 Posted : Friday, 6 January 2012 6:39:56 PM(UTC)
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quote:
Originally posted by adam PERTH
dunno about part numbers, but look at the crank snout, if its been ground down from factory its cast, steel ones ahave a thin line.

also hit it with a steel object, if it resonates for a long time with a high pitched frequency its a steel crank.
andrew stephenson Offline
#7 Posted : Friday, 6 January 2012 6:47:05 PM(UTC)
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[quote]Originally posted by andrew stephenson
COULD ANY ONE HELP TO ID A CRANK I THINK IT MAY BE STEEL.
PART NO 742000 STAMPED ON IT THANKS
thanks guys for all your info idid what you said and its STEEL is it worth anything $ i dont need 6 cylinder cranks as my hz 2 ton is a 308 stroked up thanks again ANDY S
adam PERTH Offline
#8 Posted : Sunday, 8 January 2012 1:52:17 AM(UTC)
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quote:
Originally posted by petaus
it,s the other way aroun steel has a wide forged line, cast is normally a thin parting line, i think the 308 were nodular cast iron.


yes petaus you are correct i typed it around the wrong way.
Old holdens brought on the spot, quick decision, cash paid.
castellan Offline
#9 Posted : Monday, 9 January 2012 3:09:51 AM(UTC)
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As far as 308 cranks go don't the red motor in the Group A VK get an heaver crank.
_Yoda Offline
#10 Posted : Sunday, 7 July 2019 9:30:47 PM(UTC)
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Originally Posted by: castellan Go to Quoted Post
As far as 308 cranks go don't the red motor in the Group A VK get an heaver crank.


no... the GMH ECS No: 90886 ref :VK558 issued 26/2/85
states the crankshaft is.... as per LV2/M21

that is... std LV2 (304 ) engine crank

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