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04-18-2009, 01:54 AM | #1 |
Scooby Newbie
Member#: 145656
Join Date: Apr 2007
Chapter/Region:
SCIC
Location: Riverside
Vehicle:2005 sti black |
headgasket blown? opinions needed
Well to start off i just finished building my motor in my 05 sti a couple weeks ago and now im just working the bugs out of it. Had to fix a couple minor things but now its this. Iv had to drive it back and forth to the tuner too many times fixing one thing after the next.
Here is what is happening. Tuner said the car is making around 300whp which is nothing close to which it should be at. Car idles perfect sounds good and runs strong all the way through. Since he is not seeing the expected numbers he first thought it was the larger tmic that i had which wasnt flowing well so i swapped it back out for the stock sti tmic. This made the problem worst and now he is saying that i have a water leak and water is getting inside the cylinders. I dont see any condensation in the cap and the oil doesnt look milky or anything. Im pretty much stuck at this point in what to do. Not sure if i should tear down the motor or if the problem is something else. Dont want to waste a bunch of time and money Opinions? Current mods: Stock pistons and rods 12mm oil pump ap fuel rails pe 850cc walbro pump TGV deletes ebay tmic tial bov 3 way ebc BC 280 cams BC valve springs and retainers TD06-20g 3in inlet and 8cm exhaust ported iwg header/up-pipe invidia catless tbe injen cai perrin inlet
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Last edited by nuppy; 04-18-2009 at 02:03 AM. Reason: edit mods |
04-18-2009, 03:20 AM | #2 |
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Chapter/Region:
VIC
Location: Vancouver, BC
Vehicle:'07 SWP STi Instagram | arthurlam89 |
How much boost?
Do a compression/leakdown test. Doesn't seem like your tuner knows what he's talking about. |
04-18-2009, 03:31 AM | #3 |
Scooby Specialist
Member#: 154549
Join Date: Jul 2007
Location: Reno, NV
Vehicle:2006 DOM 3 Powered WHITE/ EQ Tuned 350Whp |
who built the motor??
what was used in the rebuild- was everything replaced with stock parts and brand new gaskets all around? |
04-18-2009, 05:27 AM | #4 |
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Join Date: Mar 2004
Chapter/Region:
South East
Location: Charlotte, NC
Vehicle:06 OBS |
Did you use ARP studs? The nuts have been know to loosen on them.
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04-19-2009, 04:07 AM | #5 |
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SCIC
Location: socal
Vehicle:2002 wrx psm |
Im certain he used ARP studs
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04-19-2009, 02:43 PM | #6 |
Scooby Newbie
Member#: 145656
Join Date: Apr 2007
Chapter/Region:
SCIC
Location: Riverside
Vehicle:2005 sti black |
Sorry for the delay but i built the motor. It has brand new pistons and rods and a new crank since the other one was trashed.
It has arp studs but i really dont think they would just come loose like that. |
04-19-2009, 02:43 PM | #7 |
Scooby Newbie
Member#: 145656
Join Date: Apr 2007
Chapter/Region:
SCIC
Location: Riverside
Vehicle:2005 sti black |
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04-19-2009, 02:49 PM | #8 |
Scooby Specialist
Member#: 137168
Join Date: Jan 2007
Chapter/Region:
South East
Location: ummm..... Andrewtech ftmfw!
Vehicle:06 Built SGM WRX 35r, PPG, 280's, PSS9. |
Damn sucks man, does it smoke at all? My car smoked a lot when my gasket was blown.
Btw, you have any vids of your car at idle. |
04-19-2009, 02:57 PM | #9 |
Scooby Newbie
Member#: 145656
Join Date: Apr 2007
Chapter/Region:
SCIC
Location: Riverside
Vehicle:2005 sti black |
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04-19-2009, 04:16 PM | #10 |
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Member#: 9351
Join Date: Aug 2001
Location: Last Minute Motorsports
Vehicle:2006 trailblazer SS black |
Look it your coolant resivor. Have a friend rev up the engine. If you see bubbles then your have a head gasket leak.
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04-19-2009, 11:05 PM | #11 |
Scooby Newbie
Member#: 145656
Join Date: Apr 2007
Chapter/Region:
SCIC
Location: Riverside
Vehicle:2005 sti black |
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04-21-2009, 01:59 AM | #12 |
Scooby Newbie
Member#: 145656
Join Date: Apr 2007
Chapter/Region:
SCIC
Location: Riverside
Vehicle:2005 sti black |
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04-21-2009, 05:42 PM | #13 |
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Member#: 172501
Join Date: Feb 2008
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You also need to check the motor hot. You may not have a leak that comes through the coolant anyways, it could be the other way around. But it doesnt sound like a head gasket, as you are not loosing coolant (or are you?) and you are not overheating.. only low power.
Check your EWG. what spring do you have in there? |
04-22-2009, 02:11 AM | #14 | |
Scooby Newbie
Member#: 145656
Join Date: Apr 2007
Chapter/Region:
SCIC
Location: Riverside
Vehicle:2005 sti black |
Quote:
Im not loosing coolant and I dont think i am loosing power but the dyno shows otherwise. The motor feels like it is running strong and making power. Any sort of way its the dyno? Im running a ported internal wastegate |
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04-23-2009, 06:44 AM | #15 |
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Vehicle:2002 WRX WAGON DARK BLUE |
It wouldn't hurt to pull your plugs and look for any type of burnt water residue or sitting water droplets. If you see a residue or droplets, pull that head, check your gasket. Your might have a tourqing problem. If your heads, gaskets and plugs check out check to ensure your cams are the proper ones. You say you have 280's, go back through the specs and check your lift. Ensure you dont have any mismatch parts, that all that you have put into your car are meant to run with each other. These are just basic things I have learned from doing sbc's for the last 15yrs.
Last edited by modog88; 04-23-2009 at 06:45 AM. Reason: mispelling |
04-23-2009, 06:27 PM | #16 |
Scooby Specialist
Member#: 172501
Join Date: Feb 2008
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some dyno's will vary quite a bit. 20-30hp isnt uncommon. but before you pull the heads off or check the studs, I'd run a leak down test...
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04-24-2009, 01:42 PM | #17 | |
Scooby Newbie
Member#: 145656
Join Date: Apr 2007
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SCIC
Location: Riverside
Vehicle:2005 sti black |
Quote:
Going to check the plugs again when i get back home. They sent me the wrong cams before so i know for a fact that i got it right this time. Checked and made sure everything was secured correctly. Going to run over everything again and do a leak down test. Hopefully this tells me what the problem is. |
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04-24-2009, 02:05 PM | #18 |
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E. Canada
Location: Ontario
Vehicle:2003 WRX Sonic yellow |
look below!!!
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04-24-2009, 02:06 PM | #19 | |
Scooby Specialist
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Join Date: Jul 2008
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E. Canada
Location: Ontario
Vehicle:2003 WRX Sonic yellow |
Quote:
If there is a head gasket failure present you will not see water residue, i have neaver heard of this. Your spark plug is expose to some outragous amount of heat and share that with some coolant (Steam effect) will quickly wash out anything you had for carbon everywhere!!!! You will see a plug that looks brand spanking new like the day you put it in if there is coolent present. Try installing a presure gauge on your rad cap and and run your motor up for a while and see if the coolent presure increases more then it should. |
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04-27-2009, 05:23 PM | #20 |
Scooby Specialist
Member#: 172501
Join Date: Feb 2008
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I've never seen it on a spark plug, but hey, what do I know. I have seen it on the valve though. It turns green.
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