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304 Bolt size

CALMAN

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What is the bolt size of the Crankshaft bolt that holds the pulley on? The bolt at front of motor.
 

Smitty

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To remove it (or tighten) you need a 15/16"


and a very good rattle gun.... or long breaker bar
These mothers are very tight!... the Holden repair manual
says tighten to 200nm MINIMUM
 

Deuce

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and a very good rattle gun.... or long breaker bar
These mothers are very tight!... the Holden repair manual
says tighten to 200nm MINIMUM
Agreed.
My rattle gun is rated high enough, but didn't budge it. In the end I locked the flex plate and used a BIG breaker bar.
 

Smitty

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Agreed.
My rattle gun is rated high enough, but didn't budge it. In the end I locked the flex plate and used a BIG breaker bar.

ditto... I keep a 1.2m long bar just for these mothers :D
 

shane_3800

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They're not very tight even my old worn out shinanno rattle gun can break them loose. People that have issues is likely an air supply issue to the rattle gun. Any new electric gun like SP, Milwaukee, snap-on ect should knock these out with ease anything made 2017 and earlier is hit and miss.
 

Smitty

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Isn't that commonly called a pipe?:rolleyes:

.. with a 1/2' square drive end? ..... naaah !
big mother..... breaker bar :)
 

Smitty

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They're not very tight even my old worn out shinanno rattle gun can break them loose. People that have issues is likely an air supply issue to the rattle gun. Any new electric gun like SP, Milwaukee, snap-on ect should knock these out with ease anything made 2017 and earlier is hit and miss.

not VERY tight??? bwahahahahahahaaaaa

I have had 2 blokes (one being me) pulling hanging off my 900mm long bar*
trying to undo one of those bolts (on a HJ 308 that had never been off)
Lots of noise grunting and swearing before we heard the crack and the bar moved




*Over the years I have purchased 3 long bars.. 600mm,900mm and 1200mm
 
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