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Old 04-07-2015, 12:22 PM   #1
monkeyposeur
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Default TGV delete - cut mating surface!!!

I am building a 22T/205 hybrid for my 03 WRX I recently purchased with a burnt valve. Since the intake manifold was off I figured I might as well do TGV deletes.

I started to cut the divider plates out with a hacksaw but my blade was dull so I figured I would cut them out with my trusty sawzall. In retrospect that was a bad idea. As I cut through one plate I nicked the side and cut a slit in the top mating surface. I decided to just try and pry the rest of the plates out with a phillips screwdriver and it worked great!



I'm still going to use it, but I think I should apply some type of sealant on the top of the TGV mating surface of the such as Permatex "The Right Stuff" as well as the mating surface of the intake mani. I might even use some fuel safe sealant on the bottom of the TGV such as Hylomar. I will still use new OEM TGV and intake mani gaskets.

Anyone have any thoughts on my plan or have a better suggestion? Anyone else seal their TGVs with sealant?
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Old 04-07-2015, 01:00 PM   #2
fastnoypi
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fill with some jbweld and sand it flush
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Old 04-07-2015, 01:20 PM   #3
monkeyposeur
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You wouldn't worry about the JB weld working its way loose and causing catastrophic engine failure?
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Old 04-07-2015, 01:30 PM   #4
fastnoypi
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naw, it can withstand more heat than the intake manifold will get to. Clean the area with degreaser or brake cleaner really good before putting the jbweld on and make sure it cures.
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Old 04-08-2015, 02:43 PM   #5
drewmob
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Just leave it. Filler of any kind can and will break loose.
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Old 04-08-2015, 04:09 PM   #6
El Guapo
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Quote:
Originally Posted by drewmob View Post
Just leave it. Filler of any kind can and will break loose.
Really? ? I've got a set of deletes that used jbweld to seal where the rod was at. Previous owner ran them 3 years. I ran them 5 years.
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Old 04-08-2015, 06:00 PM   #7
aperson
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I'd be fearful of JB Weld since it isn't aluminum and could get pushed/fall out since it doesn't expand and contract at the same rate as the aluminum. I did the same exact thing last weekend doing my TGV deletes. Best bet is to either leave it or have it welded. I'm having my cousin's shop weld up the holes and fix my cut. Take it to a shop and it shouldn't be much to fix that. just have them run a bead and then finish the grinding/finishing yourself.
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Old 04-08-2015, 06:31 PM   #8
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properly done, JB weld will be a permanent repair for this issue

there have been millions of repairs done on vehicles and forgotten about using jb weld

I was out in the sticks with a friend and we ran over a stump and a root popped out and poked a hole in the gas tank.....

we figured it out quickly enough and ran the truck up on a log to tilt the gas in the tank away from the hole....

let it dry....cleaned it up......jb welded a quarter over the hole.....sat and drank beer....shot a rabbit....had dinner and drove home

sold that truck 3 or 4 years later.....quarter still stuck tight tot the tank with jb weld
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Old 04-08-2015, 08:42 PM   #9
drewmob
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Default TGV delete - cut mating surface!!!

IMO it only works well sealing between 2 pieces of metal, like using a quarter AND jbw. I bet guapo used a bolt or threaded rod AND jbw. It doesn't work well as a stand alone.

Besides, that cut doesn't need to be sealed so this discussion is irrelevant and off topic.
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Old 04-08-2015, 09:55 PM   #10
Uncle Scotty
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Quote:
Originally Posted by drewmob View Post
IMO it only works well sealing between 2 pieces of metal, like using a quarter AND jbw. I bet guapo used a bolt or threaded rod AND jbw. It doesn't work well as a stand alone.

Besides, that cut doesn't need to be sealed so this discussion is irrelevant and off topic.
that small of an area...properly cleaned....the jb weld would be forever if let cure for a couple days before you messed with it

and getting it smoothed out would take a minute or 2 and done
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Old 04-09-2015, 06:18 AM   #11
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My last sentence is still all that matters.
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Old 04-09-2015, 08:27 AM   #12
fastnoypi
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Quote:
Originally Posted by drewmob View Post
My last sentence is still all that matters.
matters to you??


from JBWelds faq

".... A full cure is reached in 15-24 hours. J-B Weld has a tensile strength of 3960 PSI and sets to a hard bond overnight. It can withstand temperatures up to 550F when fully cured."


A tgv delete will NEVER exceed those temps nor experience those pressure levels. As long as the surface has been prepped and jbweld has cured. It would last.

So no one is confused, we are talking about the jbweld epoxy twin-tube product..not the putty.
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Old 04-09-2015, 08:43 AM   #13
drewmob
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Default TGV delete - cut mating surface!!!

You're right, that flesh wound will clearly be detrimental to performance to the extent that OP should spend time and money to fix it.

Furthermore, you know that OP and anyone else who takes advice from this thread will perform the task precisely correct and complete it in a manner that will never lead to failure.

Look at the original post, read what I said, think about what I said, then respond.

Smh...
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Old 04-09-2015, 09:13 AM   #14
fastnoypi
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OP was asking about using sealants and felt he might use one.
My one suggested solution is just that..one solution.


"Just leave it. Filler of any kind can and will break loose."
If you know how a tgv delete works and what flows through it, there is no worry that jbweld will break loose, especially with such a high tensile strength.

You stated your opinion about leaving it alone. Point noted and everyone moved on but you.
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Old 04-09-2015, 12:32 PM   #15
rdieder
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Quote:
Originally Posted by drewmob View Post
IMO it only works well sealing between 2 pieces of metal, like using a quarter AND jbw. I bet guapo used a bolt or threaded rod AND jbw. It doesn't work well as a stand alone.

Besides, that cut doesn't need to be sealed so this discussion is irrelevant and off topic.
No need to sandwich metal. I used It for some light repairs. It's cheap in a pinch and works.

Last edited by rdieder; 04-09-2015 at 12:37 PM.
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Old 04-09-2015, 11:36 PM   #16
Uncle Scotty
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I have actually repaired a stripped out thread by filling it with jb weld and letting it cure....drilled and tapped it...put the bolt in and all good

it was a hail mary kind of thing that I likely wouldn't do if I had had another choice

but.....it worked....and kept working for a long time thereafter
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