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05-12-2020, 01:58 PM
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#1 |
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Registered User
Join Date: May 2015
Location: Texas
Posts: 18
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2004 Head Swap
I have a 2004 Vortec 5.3L LM7 Truck engine with 862 heads. I found a set of rebuilt 243 heads, can i swap these heads with no issues ? The 243's have a larger intake valve and larger CC.
Thanks Craig |
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05-12-2020, 08:13 PM
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#2 |
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Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,915
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Re: 2004 Head Swap
The 243 heads do flow better but the larger combustion chambers won't do your compression ratio any favors.
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And please let us know if and how your repairs were successful. |
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05-15-2020, 05:48 PM
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#3 |
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driving is in my blood
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,692
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Re: 2004 Head Swap
Depends on what you call issues. Yes they will go on and work. With the tiny oem cam the higher flow probably won't help anything but the loss of compression will hurt.
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