HELP!!! Pulled out threads on block while installing coolant crossover pipe. Options?

duck_tape187 · 09-28-2012, 01:38 AM

While installing coolant crossover pipe on my engine (2.5) after head gasket job, one of the bolts wouldn't get tight and when I removed it the threads from the block came with it. What are my options here? Motor is out of the car and I'm now at a stand still on my build.

Any advice would be great!

Thanks,

Chris

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jrodm12 · 09-28-2012, 01:43 AM

Retap it and helicoil all u can do. Maybe put a stud there if all else fails.

duck_tape187 · 09-28-2012, 01:49 AM

Anyone ever use this? permatex thread repair

DHRDAN · 09-28-2012, 02:52 AM

get a real machinist to re-tap it......it's not the end of the world... but it suuuuuuuuucks.

A real machinist and get it done no probs.

mechatricity · 09-28-2012, 09:44 AM

Quote:

Originally Posted by duck_tape187

Anyone ever use this? permatex thread repair

Interesting... Everything else permatex makes is top notch, this might be worth a shot if you're desperate.

EdgeAutosport.com · 09-28-2012, 09:47 AM

I would just play it safe and re-tap with helicoil. Better to do it right now rather than taking the chance that you may have to do it again...

bouncing_soulz · 09-28-2012, 09:51 AM

helicoil.

it is what it is... it sucks... but oh well.

duck_tape187 · 09-28-2012, 11:49 AM

Well, I've decided to go the helicoil route. Does anyone know the thread pitch of these bolts? I'm guessing 1.0 pitch but i dont have a pitch gauge. and the 1.0 nut I threaded it into felt a little loose. Also I wasn't able to even find a 1.25 helicoil set, so my guess it that it's 1.0 pitch

SubieWolfSti · 09-29-2012, 01:23 PM

Go to NAPA auto parts, thats where i got mine. They are pricey but thats one place in case you cant find them in your regular auto parts stores

gutie04 · 09-29-2012, 05:02 PM

Any auto parts or hardware store can tell you what the thread pitch is. Just make sure to get the right depth Helicoil or practice at the 2 coils one hole method a few times because it can be a biotch.

UK-Wagon · 09-29-2012, 05:06 PM

its a 6mm bolt, cant remember the pitch though. I want to say its 1.25 though, if i was at the shop today I could tell you, but im not.

you didnt need to take the crossover off to do the HG's though..... unless you were just changing the seals for good measure. Still sucks

Hondaslayer · 09-29-2012, 05:10 PM

M6x1.25

Happens pretty frequently and a helicoil will work fine. If you want to be a baller you can get some of those pimptastic threadserts, but I'm always leery about drilling into the block.

duck_tape187 · 09-29-2012, 08:06 PM

Quote:

Originally Posted by UK-Wagon

its a 6mm bolt, cant remember the pitch though. I want to say its 1.25 though, if i was at the shop today I could tell you, but im not.

you didnt need to take the crossover off to do the HG's though..... unless you were just changing the seals for good measure. Still sucks

I was changing the seals under the crossover pipe.

I did drill it out and helicoil it and it worked good. Thanks everyone for the help!

09-28-2012, 01:38 AM	#1
duck_tape187 Scooby Newbie Member#: 176517 Join Date: Apr 2008 Chapter/Region: MWSOC Location: NE Iowa Vehicle: 2004 STi JBP	HELP!!! Pulled out threads on block while installing coolant crossover pipe. Options? While installing coolant crossover pipe on my engine (2.5) after head gasket job, one of the bolts wouldn't get tight and when I removed it the threads from the block came with it. What are my options here? Motor is out of the car and I'm now at a stand still on my build. Any advice would be great! Thanks, Chris * Registered users of the site do not see these ads.

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09-28-2012, 01:43 AM	#2
jrodm12 Scooby Newbie Member#: 296705 Join Date: Oct 2011 Chapter/Region: NWIC Location: Wa Vehicle: 05 STI Black	Retap it and helicoil all u can do. Maybe put a stud there if all else fails.

09-28-2012, 01:49 AM	#3
duck_tape187 Scooby Newbie Member#: 176517 Join Date: Apr 2008 Chapter/Region: MWSOC Location: NE Iowa Vehicle: 2004 STi JBP	Anyone ever use this? permatex thread repair

09-28-2012, 02:52 AM	#4
DHRDAN Scooby Specialist Member#: 204358 Join Date: Feb 2009 Chapter/Region: SCIC Location: Santa Paula, CA. Vehicle: 01 2.5RS W/ EJ257 Black	get a real machinist to re-tap it......it's not the end of the world... but it suuuuuuuuucks. A real machinist and get it done no probs.

09-28-2012, 09:47 AM	#6
EdgeAutosport.com NASIOC Vendor Member#: 329319 Join Date: Aug 2012 Location: Denver, CO	I would just play it safe and re-tap with helicoil. Better to do it right now rather than taking the chance that you may have to do it again...

09-28-2012, 09:51 AM	#7
bouncing_soulz Scooby Newbie Member#: 175427 Join Date: Mar 2008 Chapter/Region: South East Location: Greensboro, NC Vehicle: 2005 STi Aspen White	helicoil. it is what it is... it sucks... but oh well.

09-28-2012, 11:49 AM	#8
duck_tape187 Scooby Newbie Member#: 176517 Join Date: Apr 2008 Chapter/Region: MWSOC Location: NE Iowa Vehicle: 2004 STi JBP	Well, I've decided to go the helicoil route. Does anyone know the thread pitch of these bolts? I'm guessing 1.0 pitch but i dont have a pitch gauge. and the 1.0 nut I threaded it into felt a little loose. Also I wasn't able to even find a 1.25 helicoil set, so my guess it that it's 1.0 pitch

09-29-2012, 01:23 PM	#9
SubieWolfSti Scooby Newbie Member#: 331579 Join Date: Sep 2012 Chapter/Region: SCIC Location: California Vehicle: 2006 Impreza WRX STi Gray	Go to NAPA auto parts, thats where i got mine. They are pricey but thats one place in case you cant find them in your regular auto parts stores

09-29-2012, 05:02 PM	#10
gutie04 Scooby Newbie Member#: 219717 Join Date: Aug 2009 Chapter/Region: South East Location: Jax, FL Riverside/Avondale Vehicle: 05 FXT Dom2.5R 4EAT FTW!!!!	Any auto parts or hardware store can tell you what the thread pitch is. Just make sure to get the right depth Helicoil or practice at the 2 coils one hole method a few times because it can be a biotch.

09-29-2012, 05:06 PM	#11
UK-Wagon Scooby Specialist Member#: 232430 Join Date: Dec 2009 Chapter/Region: RMIC Location: On the Left side Vehicle: 555 I haz 5 Subarus GC8/GF/SG/GD sedan & wag	its a 6mm bolt, cant remember the pitch though. I want to say its 1.25 though, if i was at the shop today I could tell you, but im not. you didnt need to take the crossover off to do the HG's though..... unless you were just changing the seals for good measure. Still sucks

09-29-2012, 05:10 PM	#12
Hondaslayer Brain Stew Moderator Member#: 4562 Join Date: Feb 2001 Chapter/Region: NWIC Location: Auburn, WA Vehicle: 1998 Forester,lifted 1975 VW Westfalia tin top	M6x1.25 Happens pretty frequently and a helicoil will work fine. If you want to be a baller you can get some of those pimptastic threadserts, but I'm always leery about drilling into the block.