|
05-12-2020, 01:58 PM
|
#1 |
|
Registered User
Join Date: May 2015
Location: Texas
Posts: 18
|
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 |
|
|
|
05-12-2020, 08:13 PM
|
#2 |
|
Moderator
 
Join Date: Oct 2008
Location: Wentworth, NH
Posts: 4,977
|
Re: 2004 Head Swap
The 243 heads do flow better but the larger combustion chambers won't do your compression ratio any favors.
__________________
1959 M35A2 LDT465-1D SOLD 1967 Dodge W200 B383, NP420/NP201 SOLD 1969 Dodge Polara 500 B383, A833 SOLD 1972 Ford F250 FE390, NP435/NP205 SOLD 1976 Chevy K20, 6.5L, NV4500/NP208 SOLD 1986 M1008 CUCV SOLD 2000 GMC C2500, TD6.5L, NV4500 2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263 2009 Impala SS LS4 V8 RTFM... GM Parts Books, GM Schematics, GM service manuals, and GM training materials...
And please let us know if and how your repairs were successful. |
|
|
|
|
05-15-2020, 05:48 PM
|
#3 |
|
driving is in my blood
Join Date: Dec 1999
Location: Mesa AZ
Posts: 5,748
|
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.
__________________
-78 c10 short/step: 388cid, M20, 5/5 drop, lots more. Playtoy and first vehicle. -98 c1500 x-cab: 5.7L, 17" rims, 5/6 drop, flowmaster, helper bags,NBS rear disk brakes. -02 Suburban 4x4: leveled front -CBR600F4i, CBR600RR, CBR1000RR, and standup skis DISCLAIMER: I cant spell for the life of me. |
|
|
|
 |
| Bookmarks |
| Thread Tools | |
| Display Modes | |
|
|
Linear Mode
