TGV Deletes

[metros]

For those of you with more experience in the subaru world. I've purchased the motive composite TGV deletes. These come with rubber o-ring style gaskets instead of the typical OEM style gasket.

I've read that these are finicky with sealing and sometimes will not seal. Should I stick with the rubber o-ring style gaskets and hope for the best or switch to OEM style gaskets?






BTW, this thread is not for debating TGV deletes. It's been beaten to death on subaru sites. Just looking for some input on the gaskets.

[Samiam1017]

I'm using a 2.5i intake and needed composite 19mm spacers. They recommend factory gaskets so that's what I'm useing

[Ironhydroxide]

If I had a granite flat big enough to surface the manifold, I'd do that making sure it's flat and it should seal great. If not, I'd use the stock gaskets.

[Samiam1017]

I have an extra set I can sell ya if you need them. Pm me an offer

[CptTripps]

I thought you needed to use the rubber seals, as the composite seals that we normally use won't seal properly. The ones used for metal TGVs are meant to be crushed, and you don't want to put too much torque on the composite housings.

Full Disclosure: My engine builder did mine. I only know this because the new seals I provided came back in the "you don't need this stuff" box.

[Mechie3]

The composite TGV's have different torque specs (lower) than OEM. The OEM gaskets won't work.

[longislandwrx]

where did you read about the o-rings not sealing well?

[metros]

Someone made a comment about them on my nasioc build thread. Now I'm second guessing them.

Sounds like I should stick with the plan to use the rubber o rings.

[Samiam1017]

I bought my composite spacers from out front motorsports and they said use factory gaskets on both sides

[Scargo]

Wuh-oh! If I may suggest to the OP, if you have the ability to check for flatness I would do that... on all parts. An O-ring type of seal needs to be compressed a decent amount, so uneven surfaces might inhibit that. You can always add Permatex silicone gasket maker or Loctite 5910 Black Maxx Silicone. Then stop fretting.

[metros]

Good tip on checking the gasket surface area.

To the others - there is a difference between spacers and tgv deletes. I'm specifically talking about the tgv deletes.

[Scargo]

Good tip on checking the gasket surface area.

To the others - there is a difference between spacers and tgv deletes. ... Correct. Spacers are used by some to give more room for oversized CAI's or to provide an insulator between the head and the intake manifold. Some think an excessive amount of heat is being transmitted to the manifold from the heads. Those stupid Subaru engineers/those smart aftermarket entrepreneurs... They require one more gasket. If you use a super-thick spacer you might consider it a tuning tool as it lengthens the runners!
On my STi, I put in an aluminum KS Tech MegaMAF (73mm Big MAF CAI) without spacers. A composite TGV delete body is another way you can control heat getting to the manifold (if you buy into the premise that it is a serious problem).
There are custom faux TGVs, modified ones and you can also send yours in to have them "fixed". I modified my own TGVs.

[wleehendrick]

There are custom faux TGVs, modified ones and you can also send yours in to have them "fixed". [/FONT][/COLOR]I modified my own TGVs.

I went with GrimmSpeed TGV deletes (they used OEM parts on a core/return basis); I also bypassed the phenolic gasket/spacer.

http://thefactoryfiveforum.com/attachment.php?attachmentid=30785&d=1404235421

Plus, mine were P&P's by Elvis... that should make my EJ sing!

http://www.messentools.com/images/emoticones/music/www.MessenTools.com-Music-big-02.gif

30785

[mekohler]

I used the o rings and so far so good on the carting I have done so far.

[Harley818]

I bought the Zerolift phenolic TGV deletes and they came with Orings.
I thought they were good for better airflow and less heat transfer - both good benefits.
This is the first I heard there may be a problem with sealing, but provided the surfaces are flat, and the o-ring grooves designed to the correct depth, they should work correctly.
With the confusion over the phenolic spacers and TGV's, perhaps that's the problem? I can see that adding a thick spacer without adequate flatness or adequate clamping pressure, that it could cause issues.

I'm going with the orings. I'll let you know in a month or so when I fire up the engine if its an issue.