I think I done blown somethin up ^_^ - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


DIY Turbo Discussion greddy on a 1.8? homebrew kit?

Reply
 
 
 
LinkBack Thread Tools
Old 09-21-2009, 06:19 PM   #1
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,206
Total Cats: 2,587
Default I think I done blown somethin up ^_^

So friday night I go out for some driving after getting the exhaust on. Car feels absolutely wonderful, pulls like a freight train, tune is pretty good (low 11's in boost) no knock that I noticed
BUT
I did notice a very faint coolant smell every now and then.

I've been having coolant leak problems as described in
This thread

A couple days before doing the exhaust install the coolant leak just STOPPED Ok great right?


Well fast forward back to friday night:

I get on it a few times, everything is cool. Line up to race with a gtx turbo swapped festiva, get him by about 6 cars maybe more, when I let off I notice a small puff of steam coming out of the back
OH ****

So I begin to pull over, when the car just dies. Right after it dies steam just GUSHES out from under the hood. So bad I can't see anything.
Pop hood.
The coolant line going from the turbo has broken/snapped off and coolant is spewing from the turbo.

OK no big deal, I wait for it to cool off, and loop the tube back into the engine bypassing the turbo.

Try to start it: no bueno. Steam is coming from every where and it wont start. So I leave the car overnight. Come pick it up on a tow truck the next morning. Crank the car just for *****: IT STARTS

Steam is coming from everywhere, and it idles like crap but it started up and drove onto the flat bed.

SOOOO

Today I did a compression test:
120
115
120
0 <---****

Looking into spark plug holes everything looks intact, there are no holes in block, the coolant is not mixed with oil (or at least it doesn't look like it. Oil level is normal.

So what do yall think? Headgasket or am I fuxorzed?
Please help. I seriously need input
TIA
-Vlad
18psi is offline   Reply With Quote
Old 09-21-2009, 06:25 PM   #2
Senior Member
iTrader: (18)
 
Join Date: May 2008
Location: Big Bear Ca
Posts: 990
Total Cats: 8
Default

Bummer!
dstn2bdoa is offline   Reply With Quote
Old 09-21-2009, 06:28 PM   #3
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

HG more likely fo sho. Similar thing happened to me years ago before I built the motor Tom has now. I got on it hard (na mind you) and it was enough of a sudden pressure increase to rupture one of the coolant lines coming off of the front water neck. All of the coolant in my motor exited that 1/4" hole in all of 15seconds. I'm sure there is an old thread. I was actually able to gimp it another full 5 miles pegged on hot to get to a parking lot (I was on the interstate). My idle was funny and car wasn't pulling normal vac. Somehow the pistons and cyls were fine. HG was toast, also had to have the head resurfaced.
neogenesis2004 is offline   Reply With Quote
Old 09-21-2009, 06:30 PM   #4
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,206
Total Cats: 2,587
Default

I hope its just headgasket. It shut right off after the coolant started gushing so I hope it didn't warp anything. The temp gauge read "normal" the whole time. Never pegged.
18psi is offline   Reply With Quote
Old 09-21-2009, 06:33 PM   #5
Senior Member
iTrader: (6)
 
tyson87's Avatar
 
Join Date: Aug 2008
Location: West Palm Beach, FL
Posts: 1,023
Total Cats: 1
Default

leakdown test?
the tester is 30$ at harbor freight
tyson87 is offline   Reply With Quote
Old 09-21-2009, 06:35 PM   #6
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,206
Total Cats: 2,587
Default

/\ That is my next step. Getting one from a friend tonight.
18psi is offline   Reply With Quote
Old 09-21-2009, 06:43 PM   #7
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

Quote:
Originally Posted by 18psi View Post
I hope its just headgasket. It shut right off after the coolant started gushing so I hope it didn't warp anything. The temp gauge read "normal" the whole time. Never pegged.
Here is the issue with that train of thought. The temp gauge is at the back of the head. When you lose coolant the water level in the block drops. If there is no coolant in the head for the temp gauge to read it will not rise to the level of the temperature of the head. It will in fact not peg to hot until the head temp is well over whatever hot is on the gauge.

With compression results like your I see a few cases.

A) Head has cracks.
B) Head is warped like ****.
C) HG is fucked 6 ways from sunday.
D) You pistons expanded into the cylinder walls and fucked up your pistons.
E) A combo of the above.
neogenesis2004 is offline   Reply With Quote
Old 09-21-2009, 07:12 PM   #8
Ben
Supporting Vendor
iTrader: (33)
 
Ben's Avatar
 
Join Date: Jul 2006
Location: atlanta-ish
Posts: 12,689
Total Cats: 99
Default

Not sure what a leakdown test is going to do for you. Save that money and start pulling stuff apart.

If you are super lucky, all you will need to check/deck the head and a headgasket.

It honestly sounds worse than that though, and you might need to be looking for an engine assembly.

Let the taredown begin.
Ben is offline   Reply With Quote
Old 09-21-2009, 07:16 PM   #9
Elite Member
iTrader: (13)
 
Join Date: Dec 2006
Location: Taos, New mexico
Posts: 5,704
Total Cats: 237
Default

Sorry to hear that, vlad.. How much boost were you running?
Fireindc is offline   Reply With Quote
Old 09-21-2009, 07:17 PM   #10
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,206
Total Cats: 2,587
Default

Running 11.5-12psi. Nothing drastic. Didn't beat on it much at all. Timing was only a few degrees higher than the base map timing we were provided with which is conservative as hell. At peak boost it was left alone. Only increased down low and up top. No knock as far as the adaptronic and knock sensor could report. No audible detonation.

I'm hoping its just headgasket. If not then forged internals here I come
18psi is offline   Reply With Quote
Old 09-21-2009, 07:24 PM   #11
Elite Member
iTrader: (13)
 
Join Date: Dec 2006
Location: Taos, New mexico
Posts: 5,704
Total Cats: 237
Default

Lol, at least you are taking it well. If it is in fact blown, than it is a great excuse for a motor build.

Still.. without detonation, and with the other threads on strange coolant smells/leaks, it kind of sounds like the HG might have been on its way out for a little while now.
Fireindc is offline   Reply With Quote
Old 09-21-2009, 07:25 PM   #12
Senior Member
iTrader: (5)
 
Join Date: Jan 2008
Location: Central, TX / Bay area, CA
Posts: 1,272
Total Cats: 3
Default

If you had a 0 on #4 to be honest sounds like you either pulled a pin out of a piston so its not moving, ripped the rod cap off, dropped a valve or burnt a large hole in the piston, 0 is very hard to achieve!
Gotpsi? is offline   Reply With Quote
Old 09-21-2009, 07:28 PM   #13
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

Out of the 4 things you just mentioned. The first 2 would be a guaranteed hole in the block.
neogenesis2004 is offline   Reply With Quote
Old 09-21-2009, 07:29 PM   #14
Senior Member
iTrader: (5)
 
Join Date: Jan 2008
Location: Central, TX / Bay area, CA
Posts: 1,272
Total Cats: 3
Default

Ive seen them both with out holes in the block, but LOTS of obvious knocking.
Gotpsi? is offline   Reply With Quote
Old 09-21-2009, 07:48 PM   #15
Murderator
Thread Starter
iTrader: (76)
 
18psi's Avatar
 
Join Date: Apr 2008
Posts: 36,206
Total Cats: 2,587
Default

Well the cylinder does move up and down. Looking through the spark plug hole looks intact. Even though it idles like **** and steams, there is no audible knock.


And about 0 I'm a bit off: its more like 10-20
18psi is offline   Reply With Quote
Old 09-21-2009, 07:51 PM   #16
Senior Member
iTrader: (5)
 
Join Date: Jan 2008
Location: Central, TX / Bay area, CA
Posts: 1,272
Total Cats: 3
Default

I have not herd of this on dohc motors but a flatened cam lobe, and I mean flat will cause a almost 0. or a failed lifter on a push rod motor, I dont know what a failed lifter would do on one of these engines though.
Gotpsi? is offline   Reply With Quote
Old 09-21-2009, 07:52 PM   #17
Senior Member
iTrader: (5)
 
Join Date: Jan 2008
Location: Central, TX / Bay area, CA
Posts: 1,272
Total Cats: 3
Default

Is there any visible damage to the top of the piston?
Gotpsi? is offline   Reply With Quote
Old 09-21-2009, 07:54 PM   #18
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

You are making crazy diagnosis now. Consider the circumstances:

-Motor was running great
-clt line burst
-slightly overheated
-wouldnt start afterward
-sat overnight
-started and runs rough with no knock

His lobe did not wear down to 0.... Use your brain, please.
neogenesis2004 is offline   Reply With Quote
Old 09-21-2009, 08:04 PM   #19
Junior Member
 
Join Date: May 2007
Location: Atlanta
Posts: 384
Total Cats: 39
Default



Taking bets yet? My money is on valve. HG is logical, but when my valve went it was a full 2 days after I had romped on it hard, accelerate past some slower traffic and there it went (though without the drama of a smoke show).
gooflophaze is offline   Reply With Quote
Old 09-21-2009, 08:13 PM   #20
Elite Member
iTrader: (12)
 
Join Date: Aug 2006
Location: Central-ish VA
Posts: 4,449
Total Cats: 16
Default

Seeing that all 4 cylinders are low on compression I will put my money on HG. I'll PM everyone my paypal later.
neogenesis2004 is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Toyota Pickup Engine Swap B.S. Monk Build Threads 24 12-11-2016 03:21 PM
elesjuan's mediocre 95 Miata adventure (google fiber edition) elesjuan Build Threads 8 02-16-2016 09:36 PM
WTB HPDE miata - Texas Voltwings Cars for sale/trade 0 09-27-2015 07:40 PM
another noob kr307 Meet and Greet 1 09-26-2015 11:33 AM
Noobie first post p51ofaces Meet and Greet 6 09-17-2015 10:08 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 09:16 AM.