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Location:
Sydney
Registered:
September 2004
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4agte TVIS removal/disabling
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Sun, 03 July 2005 10:08
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Hey all. Well i'm trying to work out how to go about removing the TVIS from my 4age in preparation for the head to be port matched but im having a bit of difficulty in choosing which way to go for.
From the searching i've done (YES i did search  ), it seems i have 1 of 3 options.
1. Remove the entire butterfly plate and replace it with a spacer (More machining  )
2. Just remove the plate and bolt the manifold directly onto the head with gaskets and gasket sealant
3. Keep the plate and just remove the butterflies
Can anyone comment on what they've done to get rid of the TVIS? Just leaving it in as is is NOT an option either (i know 1ggte's had them stock) because i'll be running 272 degree cams making them more of a hinderance than a help anyways.
I need to take the manifold on tuesday to get it port matched so i need an answer kinda quick. Thanks guys!
Eddie.
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: 4agte TVIS removal/disabling
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Sun, 03 July 2005 10:48
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i have done both 2 & 3.
with my 1st 4agte (4agze based) i removed the t-vis plate and used the gasket that goes either side of it sandwiched together and bolted the inlet manifold on.
on the current 4agte (4age based) i have used the t-vis plate, but removed the butterfly plates and center rod/s and used some JB weld to block the center holes the rod went through.
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Location:
Sydney
Registered:
September 2004
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Re: 4agte TVIS removal/disabling
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Sun, 03 July 2005 11:14
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Thanks for that. Do you just cut rod and the butterflies fall out or is there something more complex to it? Ever think of cutting out the centre part between the 2 holes in the one port on the tvis plate? Wouldn't this be better?
Eddie.
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: 4agte TVIS removal/disabling
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Sun, 03 July 2005 11:51
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there are 2 small screws on each butterly plate, undo them and the butterfly plates fall off the rod/s. by memory (its was ages ago when i did it) there was a small circlip/s that held the rod into the 2 halves of the t-vis plate.
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Ever think of cutting out the centre part between the 2 holes in the one port on the tvis plate? Wouldn't this be better?
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good point. i spose getting to it with a die grinder and taking out the center section where the butterfly plates where would have to benifit air flow i would think. not something i did, i didnt have a die grinder when i did it.
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Location:
Sydney
Registered:
September 2004
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: 4agte TVIS removal/disabling
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Sun, 03 July 2005 12:26
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mine ran fine bolted straight up, though i used both gaskets from either side of the t-vis plate as it looked to me there was small air gaps where the round ports of the inlet manifold dipped in the middle of the oval ports on the head.
the bolts/studs on the 4agze head are too short for the 4age inlet manifold w/t-vis plate. one of main reasons why i just bolted it straight up with the 2 gaskets together w/out the t-vis plate. i was too lazy to try and get the 2 end studs from my 4age head, i did have to use some washers though.
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Location:
Perth, WA
Registered:
February 2003
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Re: 4agte TVIS removal/disabling
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Mon, 04 July 2005 10:25
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Hey.
I have just come apon this problem too after getting my bigport head. I can see just a really small gap..
Anyway does anyone know the part number for the 2 gaskets i need? or the name?
Thanks.
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Location:
Bundaberg, Qld.
Registered:
May 2002
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Re: 4agte TVIS removal/disabling
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Mon, 04 July 2005 11:04
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i work in spare parts and couldnt source it, they all had smallport inlet gaskets. the first time i reused the original gaskets that i pulled off my 4age (sprayed them with Hylomar).
when i went to get a new one i had to get it from toyota, cant remember the part # though sorry.
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Location:
Sydney
Registered:
September 2004
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Re: 4agte TVIS removal/disabling
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Mon, 04 July 2005 15:17
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Manifold to TVIS: 17171-16011
TVIS to head: 17177-16011
Eddie.
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