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Old 04-17-2011, 03:13 PM   #1
Gordonr1973
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LS Experts --- What are these holes for??

I'm at a loss for remembering what bolted into these holes?

Was it just a plug for these holes in the rear of the heads?

Thanks!
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Old 04-17-2011, 03:33 PM   #2
usmcchevy
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Re: LS Experts --- What are these holes for??

Steam vent. Some years have the rear holes blocked off and just use the front others use them all.
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Old 04-17-2011, 03:43 PM   #3
Clyde65
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Re: LS Experts --- What are these holes for??

WHat he said^^^^^^^

tube
http://paceperformance.com/i-6485108...nder-head.html

bolt
http://paceperformance.com/i-6333072...tube-bolt.html
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Old 04-17-2011, 04:09 PM   #4
68GMCCustom
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Re: LS Experts --- What are these holes for??

those don't looked plugged....so your missing a piece of tubing (steel?) that connects the 2 holes or the 2 heads ...and then one side has a nipple on it for a hose to connect to the cooling system.
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Old 04-17-2011, 05:19 PM   #5
Gordonr1973
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Re: LS Experts --- What are these holes for??

You guys are absolutely right --- I had plugs in these rear holes and a steam line in the front.

I found an old pic of it.

Thanks for the responses!!!
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Last edited by Gordonr1973; 04-17-2011 at 05:21 PM.
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Old 04-17-2011, 05:24 PM   #6
Gordonr1973
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Re: LS Experts --- What are these holes for??

Circled
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