I think I blew my head gasket (Help me diagnose)

Reply Subscribe

Thread Tools

Search this Thread

06-17-2010, 03:06 PM

#21

Braineack

Boost Czar

iTrader: (62)

Join Date: May 2005

Location: Chantilly, VA

Posts: 79,508

Total Cats: 4,080

Quote:

Originally Posted by Braineack

Where is it spraying fluid from!?

Quote:

Originally Posted by Braineack

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

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?

06-17-2010, 03:13 PM

#22

wittyworks

Senior Member

iTrader: (6)

Join Date: May 2009

Location: San Francisco

Posts: 983

Total Cats: 23

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.

06-17-2010, 03:21 PM

#23

chicksdigmiatas

Elite Member

iTrader: (11)

Join Date: Apr 2008

Location: Texas, 'Murica

Posts: 2,497

Total Cats: 0

I cant wait to hear where you found the boost leak.

06-17-2010, 03:23 PM

#24

levnubhin

Elite Member

iTrader: (30)

Join Date: Aug 2007

Location: Va Beach

Posts: 7,329

Total Cats: 12

Quote:

Originally Posted by levnubhin

Check them heater hoses.

Quote:

Originally Posted by miataspeed2005

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

06-17-2010, 03:54 PM

#25

miataspeed2005

Senior Member

Thread Starter

iTrader: (3)

Join Date: Jul 2005

Location: Connect-I-Cut

Posts: 1,404

Total Cats: 0

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

06-17-2010, 03:59 PM

#26

Newbsauce

Elite Member

iTrader: (2)

Join Date: Jul 2006

Location: NoVA

Posts: 2,299

Total Cats: 2

What is the stock PSI on the wastegate? My vote is the MBC failed and your running a stock 10 PSI gate.

06-17-2010, 04:06 PM

#27

miataspeed2005

Senior Member

Thread Starter

iTrader: (3)

Join Date: Jul 2005

Location: Connect-I-Cut

Posts: 1,404

Total Cats: 0

Probably 8-10 psi, it came from a t28.

06-17-2010, 04:13 PM

#28

Cspence

Elite Member

iTrader: (11)

Join Date: Jun 2007

Location: Meriden, CT

Posts: 2,065

Total Cats: 1

Quote:

Originally Posted by miataspeed2005

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

06-17-2010, 05:37 PM

#29

miataspeed2005

Senior Member

Thread Starter

iTrader: (3)

Join Date: Jul 2005

Location: Connect-I-Cut

Posts: 1,404

Total Cats: 0

^^^^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.