T-vis gone bad, engine damaged

JDM GT Four, ST185RC and ST205.

T-vis gone bad, engine damaged

Postby Gert » Fri Jun 01, 2018 6:51 am

Hi, Little note from me, I am not often here, just drive the car.

Just for info: last week, butterfly from cilinder 3 came loose. So the screws and valve went walking through the runners and every piston is having a little damage.

It appears that the T-vis rod from 3+4 came loose, causing the valves to judder or I don't know how you call it.
The screws from cilinder 4 were already loose too.

Anyway, the engine is open again. In 2000 I rebuilded the engine and since then I drove about 85.000 kms.
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Re: T-vis gone bad, engine damaged

Postby FC Zach » Fri Jun 01, 2018 7:04 am

Ouch! ! Only that many miles?! Wasn't even broken in yet!
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Re: T-vis gone bad, engine damaged

Postby Gert » Fri Jun 01, 2018 7:19 am

Hmm, the T-vis itselfe is from 1990 and lasted 273.826 kms.
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Re: T-vis gone bad, engine damaged

Postby FC Zach » Fri Jun 01, 2018 8:09 am

That's assuming it hasn't been messed with. . . Aren't the screw ends deformed? I believe so, that shouldn't have happened.
1992 Toyota Celica AllTrac
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1976 Hercules W2000, oil injected
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Re: T-vis gone bad, engine damaged

Postby underscore » Fri Jun 08, 2018 8:05 pm

They're supposed to be, we were going to weld/braze the ones on my engine when rebuilding it to ensure they couldn't come out and found they are deformed so it should be impossible for them to come out unless someone took them out.
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Re: T-vis gone bad, engine damaged

Postby Gert » Mon Jun 18, 2018 1:13 pm

Yeah, should be. Anyway, they came out. Two are rock solid, but the other two are (coming) loose.

Image

But, as suspected, the turbo is damaged too. Any good ideas on that one? ATS turbo perhaps.
I live in Europe, so not much possibilities here.
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Re: T-vis gone bad, engine damaged

Postby underscore » Mon Jun 18, 2018 9:14 pm

Can you get closeups of the ends of the loose ones? And what year is the motor? I wonder if Toyota only starting deforming the ends partway through production.
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Re: T-vis gone bad, engine damaged

Postby Gert » Wed Jul 04, 2018 2:02 pm

Okay, sorry, took some time, but I have some pics.

The butterfly screws are deformed, but in the end, if the rod is coming loose, they are going.
Here a pic from a good one:

Image

And these from cilinder 4. You can see that the screws are coming loose and the butterfly is already on his way to destruction...

Image


Image

The car is made in Japan in 1990.
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Re: T-vis gone bad, engine damaged

Postby Gert » Wed Jul 04, 2018 2:28 pm

And a little movie from the T-vis:

https://youtu.be/UvjDRutDr78
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Re: T-vis gone bad, engine damaged

Postby underscore » Thu Jul 05, 2018 1:54 am

Interesting, I seem to recall mine being deformed differently.
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Build thread http://www.alltrac.net/phpBB2/viewtopic.php?f=44&t=44216
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Re: T-vis gone bad, engine damaged

Postby Gert » Thu Jul 05, 2018 5:11 am

underscore wrote:Interesting, I seem to recall mine being deformed differently.


Just bougth a spare one yesterday = exactly the same.!
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Re: T-vis gone bad, engine damaged

Postby underscore » Thu Jul 05, 2018 11:29 pm

I'll dig out my spare one and take a look, I didn't think to take a picture of the one in the car when the engine was apart unfortunately.
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Re: T-vis gone bad, engine damaged

Postby Gert » Wed Jul 18, 2018 5:34 am

Parts are coming together:

T-vis:

Image

Valves, bearings, etc:

Image

CT27 is on the way. :D
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Re: T-vis gone bad, engine damaged

Postby 88gt4DE » Fri Aug 03, 2018 6:08 pm

Same thing happened to me after my rebuild .... dump those damn things :x
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Re: T-vis gone bad, engine damaged

Postby Gert » Tue Aug 28, 2018 11:45 am

Head is back.

Image

Image

Image

Image

Image

Cleaned, flowed and optimized. This together with 264's and the CT27 should work well, I hope.
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