# Rebuild 1999 5.7 chevy Vortex **URL:** \ **Category:** Maintenance/Repairs\ **Created:** [August 11, 2013, 6:57pm UTC](https://community.cartalk.com/t/rebuild-1999-5-7-chevy-vortex/80851 "2013-08-11T18:57:51Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![Thunder1234](https://avatars.discourse-cdn.com/v4/letter/t/8baadc/32.png) [@Thunder1234](https://community.cartalk.com/u/Thunder1234)\ **Post date:** [August 11, 2013, 6:57pm UTC](https://community.cartalk.com/t/rebuild-1999-5-7-chevy-vortex/80851/1 "2013-08-11T18:57:51Z")
Well I just set the timing on my rebuilt chevy 5.7 1999 suburban. It still runs sluggish when I accelerate and idles nice when it’d parked. I rebuilt the whole part part of engine. This is what I did notice when I cleaned under the lower intake manifold where the fuel injectors plug in. Here is a attached picture. Let me know what you think… ---
**Author:** ![db4690](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/db4690/32/2583_2.png) [@db4690](https://community.cartalk.com/u/db4690)\ **Post date:** [August 11, 2013, 8:04pm UTC](https://community.cartalk.com/t/rebuild-1999-5-7-chevy-vortex/80851/2 "2013-08-11T20:04:10Z")
@@Thunder1234 You’re talking about the pitting, I presume . . . It’s a factory aluminum intake, I presume . . . Do NOT machine the intake to remove the pitting. Only remove any traces of old gasket. A scraper and/or a brass brush will suffice. As for reassembly, you may want to put on a SMALL amount of rtv on the pitted areas. This is only to help the new gaskets seal. FWIW . . . this is a very common situation on aluminum manifolds