vortec question please help

[cheddak5]

ok i was wondering if vortec heads and intake just bolt on or if there is any modifications needed

 

[bronc3buster842001]

They bolt right on. I think you have to have a bypass hose from the water pump to the intake as the vortec heads dont have the hole in them.

 

[cheddak5]

thank you im very new to the new mechanic stuff

 

[76zimmer]

YOu do need to have the vortec rocker arms (self aligning), and valve covers too (center bolt). And definitely need that bypass hose on the water pump. Are you using used heads or new?
I used a kit from Scoggin Dickey, that included everything (except that bypass hose)
You should use new head gaskets of course, and I used the silicone RTV for the intake gaskets where the intake and block mate.

 

[bronc3buster842001]

Why couldn't someone drill the bypass hole in the heads.

 

[cheddak5]

thanks for all the help i dont even know where im going to get any of it

 

[K5dreamer]

you also need a vortec intake manifold. old style manifolds wont fit.

 

[cheddak5]

ok this is getting confusing i will see how it goes

 

[K5dreamer]

the water bypass is a new one on me, i know the vortec heads do not have an EGR port, so if its on an emissions controlled engine you need to get the parts for that. but to my knowledge all you need are the heads, intake, and hardware. could be wrong about the water bypass though.

 

[Capt.D]

you also need a vortec intake manifold. old style manifolds wont fit.

He said heads and intake.....

 

[Cornfield creations]

Bypass hose needed. Ask me how I know

 

[K5dreamer]

He said heads and intake.....

reading and posting quick, im at work trying not to get caught getting my ck5 fix.

 

[76zimmer]

Bypass hose needed. Ask me how I know

My experience confirms this also.

OK Chedda what exactly are we working on here. I put this combo on my 1980 Block and it worked out awesome.

check this out:

http://sdparts.com/catalog/engine-components/cylinder-heads/sdpc-vortec-cylinder-heads-and-head-kits

 

[phreddei166]

Bypass hose needed. Ask me how I know

Anyone have a pic of bypass hose hooked up ? From water pump to where ? And how do you know ?

 

[76zimmer]

It goes from the port on top of the water pump, to the port on the front of the intake manifold.

 

[cheddak5]

OK I want to use this setup on my 87 GMC with a 350 I don't know much about it

 

[Cornfield creations]

Here is a pic of my bypass hose. On the non-vortec heads they have a internal coolant bypass from the intake to the block. The blocks have them, but the vortec heads do not. So you MUST run a bypass hose. Otherwise you will be ripping your hair out trying to figure out why your temp is high and spiking into the red almost instantly when running normally. I went through a 1 year battle with this because no one knew about that issue. The dealership replaced head gaskets thinking they were installed wrong.

Plus It ruined 3 water pumps, a brand new heater core, and a new radiator because of the excessive pressure built up in the system, and suddenly unloading.