O-ringing, studs, standard HG?? Enough? Too much?

[Rallystanza]

Hey Guys,

I am in the process of building my 4AGE turbo for my car.

Through getting the opinions of various people in the industry about my head to block sealing, I have decided to go for an O ringed block, standard Head gasket and ARP head studs instead of bolts.

Now I thought this combination was going to be fine but speaking to another reputable party, I have had some doubt cast on this combination of sealing.

The engine is to be turbo charged running between 20-25psi of boost.

What do you guys think of this?

Suggestions?

Thanks

Jeremy

[jeffro ra28]

Definantly use a copper gasket. O-ringing is best suited to this.

It shouldnt be to hard to find one for the 4age. 20-25psi will be fine with a copper gasket for sure.

[Rallystanza]

Definantly use a copper gasket. O-ringing is best suited to this.

It shouldnt be to hard to find one for the 4age. 20-25psi will be fine with a copper gasket for sure.

Thanks for the advice,

I have one that needs to be reanealed...

What is the downside of using a copper HG, i was turned away from that early in the piece...

Keep em coming

Jeremy

[jeffro ra28]

Well im unsure of the downside in a street application, maybe wear and tear.

But we have been running these in our race engines running 11.1 comp and having 30psi manifold pressure and our engines running 14 - 15.1 comp and they have held up to the task for years. Although the engines are stripped regularly.

[Rallystanza]

What could you see could be wrong with my setup?

The engine is quite modified but will still be used regularly for street and track stuff, and will not be stripped regularly...

So yeah what can you see could be a problem with this?

Thanks

Jeremy

[jeffro ra28]

i see the problem with using the stock gasket. Im assuming its a composite style?
Otherwise everything u have planned seems to be spot-on!

Hopefully someone that has had more experience with general performance street machines will be able to help u, rather than myself who's experience is refined to full on race engines.

[Rallystanza]

Yer I had only doubts in my idea of running with a stock gasket.

Perhaps i will see if i can get myself a multi layer steel gasket...?

Thanks very much for the info.

Regards,

Jez

[cri_ag]

i brought a 4age block that was o-ringed, i dident it was know untill i removed the old head gasket, which was just a standard style HG. It had the o-ring marks on the metal inserts of the gasket so i assume they worked in the same manner they would with a copper gasket.

[Rallystanza]

Thats what i was thinking also....

More suggestions or ideas??

Speaking with another engine builder today, he was saying to steer clear of the stud conversion because it would give too much clamping force and I should have weeker studs that stretch a bit??!!??

Im bloody confused now...

Jeremy

[jeffro ra28]

Studs are far better then bolts.

There is an ARP tech article on them but their website is being updated

Its likely to apply more clamping force with the studs even if you use the same torque specs as u would with the bolts, but the studs are still a good option. Mainly because they do not flog out the thread in the block because off regular dissassembly, but that shouldnt really be a worry with you. They also give many torqueing advantages.

I will be using studs on my N/A 18rg.

[Rallystanza]

Thanks

Just as i thought.

Keep em coming,

Jezza

[takai]

Aye studs on the 4AG are heaps better than the old bolts.
As i may have told you at some point in the past im using a higher comp TRD 0.5mm gasket with the ARP studs and they are fine.
The copper gasket should be better than the stocko due to the construction of the stock gasket, but a multilayered steel should be just as good as the copper.

[ed]

errr, you cant put orings AND a standard gasket together. nor a laminated steel gasket...

...its EITHER orings and a copper gasket, OR just a plain laminated steel, or stock gasket, with NO ring retainer grooves at all

[cri_ag]

errr, you cant put orings AND a standard gasket together. nor a laminated steel gasket...

...its EITHER orings and a copper gasket, OR just a plain laminated steel, or stock gasket, with NO ring retainer grooves at all

thats how my block was when i pulled it apart?




where would one source a multi-layered steel gasket? sorry if this is a bit of a hijack.

[ed]

penrith toyota either has them, or can get them