Coolant leaking from Head Gaskets- Fresh Build - Before First Start - 3000GT/Stealth International Message Center
3000GT/Stealth International 3000GT/Stealth International
 

Auto Insurance

» Featured Product
Wheel & Tire Center

Go Back   3000GT/Stealth International Message Center > Modifications and Technical Support > Engine - Turbo

3SI.org is the premier Mitsubishi 3000GT Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 01-22-2013, 08:55 PM   #1 (permalink)
Forum Member
 
Joeshorty's Avatar
 
Join Date: Oct 2009
Drives: 91' Stealth TT
Joeshorty is an unknown quantity at this point
Feedback Score: 1 reviews
Default Coolant leaking from Head Gaskets- Fresh Build - Before First Start

Okay, the title says it all.

I had just built this motor and spent a week figuring out what was blowing my ECI fuse and just figured that out tonight. Well when I was under the car I noticed coolant... The car has not even fired up for its first time and there is coolant, WTF?

The only originating location looks to be the head gaskets (both heads have coolant along the gaskets). There is coolant drops in various areas below the gaskets, but nothing above.

Now the heads were surfaced so that shouldn't be an issue. They were torqued down to 76 ft-lbs then to 83 ft-lbs then taken down to 0 and then torqued back to 83 ft-lbs. And it was done in the order that the picture below shows:



The only thing is that I did not use the OEM head gaskets ( I know I know, I should have, regardless). I had purchased everything before I found out OEM gaskets are the best. None the less I still used MLS gaskets that were in the kit from 3SX: Link to Gasket Kit

But I have trouble believing that is the real issue. Has anyone else experienced this problem? What are your thoughts and what should I do? The only reason I would start the car i just to quickly check if it is in fact leaking from the heads.. But that may be a bad idea..


Edit: Here is a thread I posted a couple of weeks ago. It has pics of motor work and a list of parts. First Start - Suggestions for Break-In?
__________________


Last edited by Joeshorty; 01-22-2013 at 09:00 PM.
Joeshorty is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 01-22-2013, 09:16 PM   #2 (permalink)
Forum Member
 
Escape-Performance's Avatar
 
Join Date: Aug 2010
Location: Vermont
Drives: lots
Escape-Performance is an unknown quantity at this point
Feedback Score: 11 reviews
Default Re: Coolant leaking from Head Gaskets- Fresh Build - Before First Start

I have had the same problem more than once with those head gaskets. I switched to the felpro mls and have not had that problems on any other engines since. There are a few threads out there with people having the same problems. You are not alone.
You can try draining the coolant and re-torquing the heads down to 100ftlbs. Small leaks have been fixed this way but if you are leaking along the whole seam of both heads I wouldn't recommend trying this. Also make sure that you run a thread chaser down the bolt holes in the block whenever you take the head bolts out. Then clean the holes out and blow them clean.
__________________
Single Holset HX52 with custom quick spool valve

Last edited by Escape-Performance; 01-22-2013 at 09:24 PM.
Escape-Performance is offline   Reply With Quote Quick reply to this message
Old 01-22-2013, 10:04 PM   #3 (permalink)
Forum Member
 
Joeshorty's Avatar
 
Join Date: Oct 2009
Drives: 91' Stealth TT
Joeshorty is an unknown quantity at this point
Feedback Score: 1 reviews
Default Re: Coolant leaking from Head Gaskets- Fresh Build - Before First Start

Quote:
Originally Posted by Escape-Performance View Post
I have had the same problem more than once with those head gaskets. I switched to the felpro mls and have not had that problems on any other engines since. There are a few threads out there with people having the same problems. You are not alone.
You can try draining the coolant and re-torquing the heads down to 100ftlbs. Small leaks have been fixed this way but if you are leaking along the whole seam of both heads I wouldn't recommend trying this. Also make sure that you run a thread chaser down the bolt holes in the block whenever you take the head bolts out. Then clean the holes out and blow them clean.
Thanks for the quick response.

If it is just the gaskets that makes me feel better. Those are at least changeable at low cost. There are about 2 places on each head. The coolant has been in the car for about 1 week and it is a pretty slow leak. I may just torque them to 100 ft-lbs and see how it does. I really hate doing timing with the motor in the car.
Joeshorty is offline   Reply With Quote Quick reply to this message
Old 01-22-2013, 10:23 PM   #4 (permalink)
Forum Member
 
Escape-Performance's Avatar
 
Join Date: Aug 2010
Location: Vermont
Drives: lots
Escape-Performance is an unknown quantity at this point
Feedback Score: 11 reviews
Default Re: Coolant leaking from Head Gaskets- Fresh Build - Before First Start

just keep in mind that it can be other things. This was my personal experience that I know a few other members have shared. Seeing how both heads are leaking I would believe it is your problems as well. Some will advise to run the engine before re-torquing some will not. On some older cars the factory spec is to run the car up to temp before the final torque on the head bolts. Bmw did this, you only put 40 ft/lbs to the bolts before you ran the engine.
Escape-Performance is offline   Reply With Quote Quick reply to this message
Old 01-22-2013, 10:35 PM   #5 (permalink)
Forum Member
 
Joeshorty's Avatar
 
Join Date: Oct 2009
Drives: 91' Stealth TT
Joeshorty is an unknown quantity at this point
Feedback Score: 1 reviews
Default Re: Coolant leaking from Head Gaskets- Fresh Build - Before First Start

Quote:
Originally Posted by Escape-Performance View Post
just keep in mind that it can be other things. This was my personal experience that I know a few other members have shared. Seeing how both heads are leaking I would believe it is your problems as well. Some will advise to run the engine before re-torquing some will not. On some older cars the factory spec is to run the car up to temp before the final torque on the head bolts. Bmw did this, you only put 40 ft/lbs to the bolts before you ran the engine.
Yeah, my first thought was oh great are the heads cracked but they looked fine when I installed them and I doubt both would be right out the machine shop.

I had planned to re-torque after its first warm up before I even saw this leak. So since the leak isn't real bad on either head from what I can tell, Maybe i'll do the 100 ft-lbs after the first warm up while monitoring everything.
Joeshorty is offline   Reply With Quote Quick reply to this message
Old 01-23-2013, 01:22 AM   #6 (permalink)
Wheee! 2 wheels is fun!
 
speedy25's Avatar
 
Join Date: Dec 2006
Location: NE oHIo
Drives: Various Japanese
speedy25 Level 1speedy25 Level 1speedy25 Level 1
Feedback Score: 7 reviews
Default Re: Coolant leaking from Head Gaskets- Fresh Build - Before First Start

Quote:
Originally Posted by Escape-Performance View Post
make sure that you run a thread chaser down the bolt holes in the block whenever you take the head bolts out. Then clean the holes out and blow them clean.
This is an important and often overlooked step. If you dont have clean threads and nothing in the hole you wont get even torque. Its easy for liquid or gasket bits to end up in these holes and have the bolts "bottom out" before proper clamping occurs. Instead of just going to 100'#, pull the bolt out and make sure the bottom of the hole is clean.

-SP
speedy25 is offline   Reply With Quote Quick reply to this message
Old 01-23-2013, 12:43 PM   #7 (permalink)
Forum Member
 
Joeshorty's Avatar
 
Join Date: Oct 2009
Drives: 91' Stealth TT
Joeshorty is an unknown quantity at this point
Feedback Score: 1 reviews
Default Re: Coolant leaking from Head Gaskets- Fresh Build - Before First Start

Quote:
Originally Posted by speedy25 View Post
This is an important and often overlooked step. If you dont have clean threads and nothing in the hole you wont get even torque. Its easy for liquid or gasket bits to end up in these holes and have the bolts "bottom out" before proper clamping occurs. Instead of just going to 100'#, pull the bolt out and make sure the bottom of the hole is clean.

-SP
Alright will do. I don't have a thead chaser, i'm assuming I can just get one at autozone. Do you know what size it would be?
Joeshorty is offline   Reply With Quote Quick reply to this message
Old 01-23-2013, 12:57 PM   #8 (permalink)
Drunk as a lord
 
Forest Gump's Avatar
 
Join Date: Nov 2004
Location: Cape Girardeau Mo
Drives: 1995 Stealth TT
Forest Gump Level 2Forest Gump Level 2Forest Gump Level 2Forest Gump Level 2Forest Gump Level 2Forest Gump Level 2
Feedback Score: 103 reviews
Default Re: Coolant leaking from Head Gaskets- Fresh Build - Before First Start

fyi the spec for turbos is 90, not 83, but I am sure that is not the problem.

I guess you didn't install the gaskets upside down, did you?
__________________

Pampena 3.5 Stroker, TiAL DR750s, ETS FMIC, FIC 1050s, Walbro 416/485, E85, Chrome ECU, 85mm MAF, Dejon intake pipes, Tial QR, DN Precats, Tanabe Medallion Touring, 3sx Single Pass Rad, Samco Hoses, Stoptechs,, Tein S-Techs, Bilstein HDs, Southbend FE Clutch, 300M O/S, Billet T-Case, 5 Speed Trans
Forest Gump is offline   Reply With Quote Quick reply to this message
Old 01-23-2013, 04:07 PM   #9 (permalink)
Forum Member
 
Joeshorty's Avatar
 
Join Date: Oct 2009
Drives: 91' Stealth TT
Joeshorty is an unknown quantity at this point
Feedback Score: 1 reviews
Default Re: Coolant leaking from Head Gaskets- Fresh Build - Before First Start

Quote:
Originally Posted by Forest Gump View Post
fyi the spec for turbos is 90, not 83, but I am sure that is not the problem.

I guess you didn't install the gaskets upside down, did you?
Ah, I did not know that, thank you.

That was my friends first thought but I remember I tried it each way and it only lined up perfectly one way. And I compared the fit to the OEM gasket, so I don't believe they are upside down.

Thanks again everyone for the input.
Joeshorty is offline   Reply With Quote Quick reply to this message
Old 01-24-2013, 02:52 AM   #10 (permalink)
Twin Turbo
 
GTOJOE's Avatar
 
Join Date: May 2008
Location: Melbourne, Australia
Drives: 1990 GTO TT
GTOJOE is an unknown quantity at this point
Feedback Score: 6 reviews
Default Re: Coolant leaking from Head Gaskets- Fresh Build - Before First Start

Hmmm I an also running the same 3sx MLS head gasket and I have noticed coolant on uh trans but couldn't find where it was coming from. I hope I don't have the same issue. Going to buy a pressure tester now.

Sent from my GT-I9300 using AutoGuide App
__________________
1990 JDM GTO TT with Vi-PEC plug-in V44 EMS, TD04-13T's, 3SX Downpipe, MP Hi-flow cat, ARC SMIC's, Aeromotive Stealth 340LPH pump, Fuelab 515 FPR, Ninja Performance 75amp hotwire kit, oohnoo fuel loop & rail adapters, Nylon braided ethanol fuel line, NGK AFX Wideband, K&N FIPK, Iridium plugs, Turbo XS racing BOV, 3SX poly mounts, Custom 280km/h speedo.

Waiting install
Injector Dynamics 725cc, HKS Twin Spark DLI.

Helpful stuff
How to convert a JDM 180km/h speedo to 280km/h

Understanding MAF part numbers and compatibility
GTOJOE is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

  3000GT/Stealth International Message Center > Modifications and Technical Support > Engine - Turbo

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the 3000GT/Stealth International Message Center forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Free email addresses do not work(yahoo, hotmail, gmail,...)
We are currently being blocked by AOL so any AOL based address may not work(aol.com, aim.com, netscape.net, cs.com)
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On


Powered by vBadvanced CMPS v3.2.2

All times are GMT -5. The time now is 12:53 AM.




Garage Plus vBulletin Plugins by Drive Thru Online, Inc.

Search Engine Optimization by vBSEO 3.3.2