1997 VT - VY - VZ (V6 Inlet Manifold and Plenum)

[1997 VT Calais Series 1]

Hi JC Members,

I have a question regarding the Inlet Manifold and Plenum on a 1997 VT V6 Ecotec.

Are the Inlet Manifold and Plenums on a VT V6 Ecotec the same as the VY V6 Ecotec?

And did the VZ V6 Come out with a V6 Ecotec? And if they did? Are the Inlet Manifolds and Plenum's the same as the 1997 VT V6 Ecotec Inlet Manifold and Plenum?

And can you briefly tell me what the difference is?

Thank you for your help
Regards
1997 VT Calais Series 1

 

[commodore665]

The plenum on the VT and VY are slightly different, the difference being the PCV valve I think , and the VZ did not come with a ecotec , it was released with the Alloytec engine a totally new design and displacement.

 

[1997 VT Calais Series 1]

The plenum on the VT and VY are slightly different, the difference being the PCV valve I think , and the VZ did not come with a ecotec , it was released with the Alloytec engine a totally new design and displacement.

Ahhhhh Ok, that means the gaskets will be different?
Do you know if the gaskets are different for the Inlet manifold to the heads?

 

[commodore665]

Possibly ever so slightly, it would pay to check with an auto parts shop to get the right ones for your car

 

[lout]

if you are replacing the inlet gaskets use the ones from mace
they are far better quality
LIM gaskets mace GSK601
everything else i use holden
New radiator cap 92056367
Lim to plenum vx-vy 92066743
Plenum lid 92061891
Plenum to throttle body 92060972
some part numbers i have forgotten
and the heater outlet o-rings
thermostat and gasket
Replace leaking rocker cover gaskets 25532619 x2
this link shows the different plenum gaskets https://www.ebay.com.au/itm/INLET-I...040096?hash=item3d0b53b460:g:q~YAAOSwEeFVIPcD
a bit of reading for you
https://forums.justcommodores.com.au/threads/vs-vy-series-2-inlet-manifold-gasket-replacement-6hr-includes-pics.187621
https://forums.justcommodores.com.au/threads/how-replace-lower-intake-manifold-gaskets-vs-vy-ecotec.236774