Need help - stripped mtec spring - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

stueck9356 · 02-20-2014, 07:40 PM

I did something bad. I feel like I did something VERY bad. The passenger side of the transmission has a 27mm bolt that unscrews to put that mtec shifter spring in. I stripped the threads that screws into. On the transmission. HELPPPP

Pictures:

AdrianG · 02-20-2014, 08:08 PM

It doesn't look that bad... Get someone who isn't hamfisted to chase out the threads and then remember this every time you screw something in for the rest of your life.

Mine was the spark plug on my first dirt bike, I was 6.

- AdrianG

Calum · 02-20-2014, 08:09 PM

Get a set of jewelers files, a full bag of patience, and comfortable. Leave the spring out for now. Carefully clean up the bad thread, ensuring EVERY piece of debris is pulled out of the transmission. Use the files to smooth the valley of the thread until the bolt can screw in properly. For an experience wrencher this would only take about 15 minutes. As I'm sure you'll be much slower learning, expect it to take a while.

Calum · 02-20-2014, 08:10 PM

Quote:

Originally Posted by AdrianG

It doesn't look that bad... Get someone who isn't hamfisted to chase out the threads and then remember this every time you screw something in for the rest of your life.

Mine was the spark plug on my first dirt bike, I was 6.

- AdrianG

Not a bad idea, until you realize that person will be dumping debris into the transmission.

roddy · 02-20-2014, 08:13 PM

How deep does the bolt go? Is it just the 1st thread or two that are messed up?
If not, http://www.helicoil.com.sg/HeliCoil-...-Inserts.shtml

AdrianG · 02-20-2014, 08:14 PM

Yeah, the file idea is a better way to go. Maybe put a magnet nearby to try and avoid getting filings in the trans. Change the fluid afterwards as well, the drain plug has a magnet on it too which should help

- AdrianG

roddy · 02-20-2014, 08:17 PM

Quote:

Originally Posted by Calum

Not a bad idea, until you realize that person will be dumping debris into the transmission.

Using some thick grease on the thread chaser/tap and going slowly will keep that under control.

jamesm · 02-20-2014, 08:26 PM

Don't feel too bad about it, everyone learns that lesson. For me it was a dirtbike as well. Luckily kx80 heads are cheap enough I just saved up lawn mowing money and bought another lol. Just be more careful next time, and don't try to force anything.

roddy · 02-20-2014, 08:27 PM

I gotta get me one of those aluminum magnets! (J/K)

Calum · 02-20-2014, 08:28 PM

Quote:

Originally Posted by jamesm

Don't feel too bad about it, everyone learns that lesson. For me it was a dirtbike as well. Luckily kx80 heads are cheap enough I just saved up lawn mowing money and bought another lol. Just be more careful next time, and don't try to force anything.

Mine was a $30K fuel pump for a gas turbine...

Calum · 02-20-2014, 08:29 PM

Quote:

Originally Posted by roddy

Using some thick grease on the thread chaser/tap and going slowly will keep that under control.

Maybe. I'd still rather use a small file.

stueck9356 · 02-20-2014, 08:41 PM

It is just the first few threads. The bolt is perfectly fine. cleaned out any shavings on the hole and bolt and tried to thread back in, it catches for one spin then just drops out again.

I might try the thread chaser. Have to find one big enough though. The opening is at an awkward angle too and I don't want to make it worse tomorrow!

humfrz · 02-20-2014, 08:44 PM

Quote:

Originally Posted by stueck9356

I did something bad. I feel like I did something VERY bad. .........

Yes, you are a very, very BAD boy!

Just goop it up with sealant, center the plug ..... slam it in with a BFH (Big F****** Hammer)...... tighten it down and sell the car.

Seriously, I'd "borrow" a tap and chase the threads.

humfrz

roddy · 02-20-2014, 08:47 PM

Quote:

Originally Posted by Calum

Mine was a $30K fuel pump for a gas turbine...

Ouch!

I've never tried files...I do have some small ones, but never really considered it. It would sure be a lot less money than a tap that large.

02-20-2014, 07:40 PM	#1
stueck9356 Member Join Date: Oct 2013 Drives: 2015 VW GTI SE Location: Charlotte, NC Posts: 71 Thanks: 6 Thanked 11 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Need help - stripped mtec spring I did something bad. I feel like I did something VERY bad. The passenger side of the transmission has a 27mm bolt that unscrews to put that mtec shifter spring in. I stripped the threads that screws into. On the transmission. HELPPPP Pictures:

02-20-2014, 08:13 PM	#5
roddy Senior Member Join Date: Apr 2012 Drives: '13 Ultramarine Location: Ontario Canada Posts: 2,243 Thanks: 1,476 Thanked 1,165 Times in 685 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	How deep does the bolt go? Is it just the 1st thread or two that are messed up? If not, http://www.helicoil.com.sg/HeliCoil-...-Inserts.shtml __________________ no man with a good car needs to be justified...

02-20-2014, 08:27 PM	#9
roddy Senior Member Join Date: Apr 2012 Drives: '13 Ultramarine Location: Ontario Canada Posts: 2,243 Thanks: 1,476 Thanked 1,165 Times in 685 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	I gotta get me one of those aluminum magnets! (J/K) __________________ no man with a good car needs to be justified...

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02-20-2014, 08:08 PM	#2
AdrianG Generally Well Liked Join Date: Aug 2013 Drives: '08 STi Hatch, '11 Outback 3.6R Location: Ontario Posts: 419 Thanks: 43 Thanked 197 Times in 125 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	It doesn't look that bad... Get someone who isn't hamfisted to chase out the threads and then remember this every time you screw something in for the rest of your life. Mine was the spark plug on my first dirt bike, I was 6. - AdrianG

02-20-2014, 08:09 PM	#3
Calum That Guy Join Date: Dec 2011 Drives: 2013 asphalt FRS MT Location: Halifax, Nova Scotia Posts: 4,865 Thanks: 5,058 Thanked 2,867 Times in 1,499 Posts Mentioned: 82 Post(s) Tagged: 1 Thread(s)	Get a set of jewelers files, a full bag of patience, and comfortable. Leave the spring out for now. Carefully clean up the bad thread, ensuring EVERY piece of debris is pulled out of the transmission. Use the files to smooth the valley of the thread until the bolt can screw in properly. For an experience wrencher this would only take about 15 minutes. As I'm sure you'll be much slower learning, expect it to take a while.

02-20-2014, 08:14 PM	#6
AdrianG Generally Well Liked Join Date: Aug 2013 Drives: '08 STi Hatch, '11 Outback 3.6R Location: Ontario Posts: 419 Thanks: 43 Thanked 197 Times in 125 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Yeah, the file idea is a better way to go. Maybe put a magnet nearby to try and avoid getting filings in the trans. Change the fluid afterwards as well, the drain plug has a magnet on it too which should help - AdrianG

02-20-2014, 08:26 PM	#8
jamesm Banned Join Date: Mar 2013 Drives: 2013 FR-S Location: Orlando, FL Posts: 2,929 Thanks: 1,166 Thanked 2,293 Times in 1,180 Posts Mentioned: 313 Post(s) Tagged: 4 Thread(s)	Don't feel too bad about it, everyone learns that lesson. For me it was a dirtbike as well. Luckily kx80 heads are cheap enough I just saved up lawn mowing money and bought another lol. Just be more careful next time, and don't try to force anything.

02-20-2014, 08:41 PM	#12
stueck9356 Member Join Date: Oct 2013 Drives: 2015 VW GTI SE Location: Charlotte, NC Posts: 71 Thanks: 6 Thanked 11 Times in 9 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	It is just the first few threads. The bolt is perfectly fine. cleaned out any shavings on the hole and bolt and tried to thread back in, it catches for one spin then just drops out again. I might try the thread chaser. Have to find one big enough though. The opening is at an awkward angle too and I don't want to make it worse tomorrow!

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