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243 head question

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Old Jan 20, 2011 | 08:48 PM
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Default 243 head question
Do they have the same accessory threads etc for the power steering pump and whatever else mounts to them as my stock 99 LS1 853 heads?
Are 243's LS6 heads?
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Old Jan 20, 2011 | 08:51 PM
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Yes and yes
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Old Jan 20, 2011 | 08:57 PM
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Thanks!
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Old Jan 20, 2011 | 10:27 PM
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No problem. Now go make some powaa
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Old Jan 20, 2011 | 11:15 PM
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Dont forget to switch over the rear passenger side plug and front driver side sensor to your new ls6 heads.
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Old Jan 20, 2011 | 11:35 PM
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Originally Posted by masterz28
Dont forget to switch over the rear passenger side plug and front driver side sensor to your new ls6 heads.
what plug on the passenger side, i am picking up a set of 243's and i know the sensor (coolant sensor) on the drivers side front but what is the plug on the passenger side rear? any pics?
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Old Jan 21, 2011 | 01:33 AM
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Originally Posted by trans_am7935
what plug on the passenger side, i am picking up a set of 243's and i know the sensor (coolant sensor) on the drivers side front but what is the plug on the passenger side rear? any pics?
Yeah its this little guy...

http://www.ls1howto.com/howto/fbody/...2/IMAGE006.jpg

I didnt know about it either when i switched from 853 to 243s. I forgot to take it out and got scared when i filled up my radiator. It needs a alan to key it in.
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Old Jan 21, 2011 | 06:25 AM
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Originally Posted by masterz28
Yeah its this little guy...

http://www.ls1howto.com/howto/fbody/...2/IMAGE006.jpg

I didnt know about it either when i switched from 853 to 243s. I forgot to take it out and got scared when i filled up my radiator. It needs a alan to key it in.
Great info; thanks man!
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Old Jan 21, 2011 | 12:16 PM
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now is that with all heads or only when switching to 243 heads?
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Old Jan 27, 2011 | 08:48 PM
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Any difference in internal flow design or design improvements with say an earlier 243 head and a 2010 silverado 243 head?
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Old Jan 27, 2011 | 09:04 PM
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Do the truck 243 heads and car 243 heads have the same accessory thread locations (power steering pump, dipstick bolt, etc)?
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Old Jan 27, 2011 | 09:30 PM
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Yes everything is the same, all bolts and ports. Improvements from earlier head to late heads, I woudnt think so unless they have a different name to it.
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