I think I blew my head gasket (Help me diagnose) - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


General Miata Chat A place to talk about anything Miata

Reply
 
 
 
LinkBack Thread Tools
Old 06-17-2010, 04:06 PM   #21
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

Quote:
Originally Posted by Braineack View Post
Where is it spraying fluid from!?
Quote:
Originally Posted by Braineack View Post
find it, then post about how you had to replace a rubber cap or hose or whatnot and how your gasket is fine.
Quote:
Originally Posted by miataspeed2005 View Post
Found it! It's the heater hose all the way in the back of the head, there's a tiny hole and it sprays when I rev it... But why is my boost so low?




boost, dunno what's controlling it?
Braineack is offline   Reply With Quote
Old 06-17-2010, 04:13 PM   #22
Senior Member
iTrader: (6)
 
Join Date: May 2009
Location: San Francisco
Posts: 989
Total Cats: 23
Default

i think you should fix the smoke problem first, then work on the boost problem. Maybe while fixing the first, you find whats causing the low boost.
wittyworks is offline   Reply With Quote
Old 06-17-2010, 04:21 PM   #23
I'm Miserable!
iTrader: (11)
 
Join Date: Apr 2008
Location: Texas, 'Murica
Posts: 2,505
Total Cats: 7
Default

I cant wait to hear where you found the boost leak.
chicksdigmiatas is offline   Reply With Quote
Old 06-17-2010, 04:23 PM   #24
Elite Member
iTrader: (30)
 
Join Date: Aug 2007
Location: Va Beach
Posts: 7,282
Total Cats: 0
Default

Quote:
Originally Posted by levnubhin View Post
Check them heater hoses.
Quote:
Originally Posted by miataspeed2005 View Post
Found it! It's the heater hose all the way in the back of the head, there's a tiny hole and it sprays when I rev it... But why is my boost so low?
I'm ******* awesome. I love diagnosing **** from 1300 miles away lol.
__________________
Best Car Insurance | Auto Protection Today | FREE Trade-In Quote
levnubhin is offline   Reply With Quote
Old 06-17-2010, 04:54 PM   #25
Senior Member
Thread Starter
iTrader: (3)
 
Join Date: Jul 2005
Location: Connect-I-Cut
Posts: 1,431
Total Cats: 0
Default

One down, one more to go... It's a mbc contolling the boost, all my couplers are good, pipes are good, wastegate moves fine, bov is good, turbo is good, mbc hoses good... Maybe my hallman mbc went to ****? Can't think anything else, both laptop and gauge recorded boost at 10psi
miataspeed2005 is offline   Reply With Quote
Old 06-17-2010, 04:59 PM   #26
Elite Member
iTrader: (2)
 
Newbsauce's Avatar
 
Join Date: Jul 2006
Location: NoVA
Posts: 2,304
Total Cats: 2
Default

What is the stock PSI on the wastegate? My vote is the MBC failed and your running a stock 10 PSI gate.
Newbsauce is offline   Reply With Quote
Old 06-17-2010, 05:06 PM   #27
Senior Member
Thread Starter
iTrader: (3)
 
Join Date: Jul 2005
Location: Connect-I-Cut
Posts: 1,431
Total Cats: 0
Default

Probably 8-10 psi, it came from a t28.
miataspeed2005 is offline   Reply With Quote
Old 06-17-2010, 05:13 PM   #28
Elite Member
iTrader: (11)
 
Join Date: Jun 2007
Location: Meriden, CT
Posts: 2,072
Total Cats: 1
Default

Quote:
Originally Posted by miataspeed2005 View Post
Found it! It's the heater hose all the way in the back of the head, there's a tiny hole and it sprays when I rev it... But why is my boost so low?
Try adjusting your mbc and see if your boost changes (in either direction)...maybe the mechanism inside is stuck or something. If your couplers / clamps are good, your wg is good, then it has to be something stupid like the mbc not functioning properly....There's only so many things that can affect boost...

See all that tearing up this morning over nuthin
Cspence is offline   Reply With Quote
Old 06-17-2010, 06:37 PM   #29
Senior Member
Thread Starter
iTrader: (3)
 
Join Date: Jul 2005
Location: Connect-I-Cut
Posts: 1,431
Total Cats: 0
Default

^^^^yeah I think I'm gonna take the mbc apart and clean it.... Chris you were shaking so much this morning cause you were afraid to help me do my head gasket, I think I even saw a tear on your eye too.
miataspeed2005 is offline   Reply With Quote
Old 06-17-2010, 07:08 PM   #30
Boost Czar
iTrader: (61)
 
Braineack's Avatar
 
Join Date: May 2005
Location: Chantilly, VA
Posts: 72,872
Total Cats: 1,790
Default

at least the HG is easy.
Braineack is offline   Reply With Quote
Old 06-17-2010, 07:23 PM   #31
Elite Member
iTrader: (30)
 
Join Date: Aug 2007
Location: Va Beach
Posts: 7,282
Total Cats: 0
Default

levnubhin is offline   Reply With Quote
Old 06-17-2010, 11:07 PM   #32
Senior Member
Thread Starter
iTrader: (3)
 
Join Date: Jul 2005
Location: Connect-I-Cut
Posts: 1,431
Total Cats: 0
Default

Yeah I went to napa and payed $15 for the hose and it'll be in tomorrow morning
miataspeed2005 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Project Gemini - Turbo Civic on the Cheap Full_Tilt_Boogie Build Threads 58 Yesterday 10:04 PM
Another Cast Manifold Corky Bell Prefabbed Turbo Kits 18 11-22-2016 10:01 PM
Bad head gasket or ? shooterschmidty Engine Performance 8 09-30-2015 11:28 PM
Another Alternator thread ihiryu General Miata Chat 9 09-28-2015 11:22 AM


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 Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:03 PM.