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gasket sealing on ported heads
Posted: Sat Nov 14, 2009 4:54 pm
by Teesdale_landrover
I was thinking of investing in a set of ported heads on a n/a 3.9
the ones i have seen the gasket face on the inlet ports is tiny
I was wondering how likely it is to have problems
I will not tolerate any less than 100% reliability
opinions appreciated
Re: gasket sealing on ported heads
Posted: Sat Nov 14, 2009 5:26 pm
by sidecar
Teesdale_landrover wrote:I was thinking of investing in a set of ported heads on a n/a 3.9
the ones i have seen the gasket face on the inlet ports is tiny
I was wondering how likely it is to have problems
I will not tolerate any less than 100% reliability
opinions appreciated
My heads have been ported, I port matched the tin valley gasket myself, I then used a very thin smear of silicon sealant on both sides of the gasket. The silicon was left to cure for a few hours before the manifold was fitted.
I'm pleased to report that it has been 100% reliable!
Posted: Sun Nov 15, 2009 9:55 am
by Eliot
are you talking about the gasket face between adjacent ports?
This is very thin, but from what I can picture in my mind it only leads to the same big hole (the plenum) so it doesn't matter?
Posted: Sun Nov 15, 2009 10:00 am
by sidecar
Eliot wrote:are you talking about the gasket face between adjacent ports?
This is very thin, but from what I can picture in my mind it only leads to the same big hole (the plenum) so it doesn't matter?
Good thinking!
Your statement is true even for the eddy 180 manifold as the two outers from one bank and the two inners from the other bank are fed from the same part of the manifold.
Posted: Sun Nov 15, 2009 12:58 pm
by Teesdale_landrover
Eliot wrote:are you talking about the gasket face between adjacent ports?
This is very thin, but from what I can picture in my mind it only leads to the same big hole (the plenum) so it doesn't matter?
no i was thinking about the outer edges of the ports,
it seems i dont have anything to worry about
Posted: Sun Nov 15, 2009 1:02 pm
by sidecar
Teesdale_landrover wrote:Eliot wrote:are you talking about the gasket face between adjacent ports?
This is very thin, but from what I can picture in my mind it only leads to the same big hole (the plenum) so it doesn't matter?
no i was thinking about the outer edges of the ports,
it seems i dont have anything to worry about
Bear in mind that if you get the ported heads you really should port match the manifold. You can do this yourself but it will take you about two days in total.