Stock Vortec Rockers?
Junior Member
Joined: Oct 2015
Posts: 322
From: Louisiana
Today I pulled the old 4.3 from my Blazer and installed the reman'd GM longblock I bought. I noticed the rockers on the new engine are different than any I remember seeing. They look similar to LS1 rockers. My stockers look like this:
Which is what pulls up when I search for replacement Vortec rockers. PN 12599650
This is what came on the new long block:
Do those look correct?
Which is what pulls up when I search for replacement Vortec rockers. PN 12599650
This is what came on the new long block:
Do those look correct?
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Junior Member
Joined: Mar 2007
Posts: 401
From: Shreveport, LA
I don't think that's correct. My truck is a 2001 and came with roller trunnion rockers, as pictured. It couldn't have been the only one. Still, my point was the style(LS1 style) of rocker was different. Until that point, I had never seen those on a V6. Only the 4.8/5.3/5.7/6.0/etc... That's what I was asking about. Sorry if I wasn't clear about it.
Starting Member
Joined: Jul 2018
Posts: 1
Today I pulled the old 4.3 from my Blazer and installed the reman'd GM longblock I bought. I noticed the rockers on the new engine are different than any I remember seeing. They look similar to LS1 rockers. My stockers look like this:
Which is what pulls up when I search for replacement Vortec rockers. PN 12599650
This is what came on the new long block:
Do those look correct?
Which is what pulls up when I search for replacement Vortec rockers. PN 12599650
This is what came on the new long block:
Do those look correct?
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Joined: Oct 2014
Posts: 4,334
From: North Central Indiana
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Junior Member
Joined: Mar 2007
Posts: 401
From: Shreveport, LA
That's incorrect. My 2001 had roller fulcrum rockers, as pictured. It wasn't the only one. Afaik, that started around 1996.
Last edited by midnightbluS10; Jan 30, 2020 at 04:29 AM.
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