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Why forge a 6G75?
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Administrator
Posted 7/8/2011 19:12 (#13467)
Subject: Why forge a 6G75?



Frequent flyer Gold

Posts: 1092
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Location: An island off southern Tasmania.		These photos from another site by a user called Joey shows it all.

The stock conrods are risky above 6 psi and the pistons just fall apart unless forged.





(piston crack from edge.JPG)



(piston crack.JPG)



(con rod failed.JPG)



(damaged bottom end.JPG)



(damaged oil pan.JPG)



Attachments
----------------
Attachments piston crack from edge.JPG (99KB - 742 downloads)
Attachments piston crack.JPG (109KB - 762 downloads)
Attachments con rod failed.JPG (118KB - 680 downloads)
Attachments damaged bottom end.JPG (116KB - 768 downloads)
Attachments damaged oil pan.JPG (89KB - 672 downloads)
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Administrator
Posted 7/8/2013 10:25 (#15468 - in reply to #13467)
Subject: Re: Why forge a 6G75?



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Posts: 1092
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Location: An island off southern Tasmania.		The main weakness in the 6G75 is bolt stretch on the center 8 main bearing bolts.
They have been shown to stretch by several millimetres in worst cases.

You MUST replace the bolts when replacing bearings.
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wsbtt
Posted 11/8/2013 18:19 (#15473 - in reply to #15468)
Subject: Re: Why forge a 6G75?



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Posts: 421
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Location: Brisbane,qld		Ill be doing that on my 6G75 build,cheers
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Administrator
Posted 11/8/2013 21:43 (#15476 - in reply to #13467)
Subject: Re: Why forge a 6G75?



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Posts: 1092
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Location: An island off southern Tasmania.		The bolts used in my build require a professional install, they are 1.5mm greater diameter so need to be drilled and tapped.

Engine has to be on the bench.

only do the inner 8 bolts as there isn't enough material in the block to do the outside 8 bolts.
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wsbtt
Posted 11/8/2013 22:06 (#15478 - in reply to #15476)
Subject: Re: Why forge a 6G75?



Frequent flyer Gold

Posts: 421
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Location: Brisbane,qld		Thats in your forged engine, yeah?, so are the ARP anygood then?
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Administrator
Posted 12/8/2013 13:02 (#15479 - in reply to #13467)
Subject: Re: Why forge a 6G75?



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Posts: 1092
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Location: An island off southern Tasmania.		Here are the locations of the 8 bolts.



(6G75 bolts.JPG)



Attachments
----------------
Attachments 6G75 bolts.JPG (206KB - 1652 downloads)
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