Turbo SVT with possible blow by? - Ford Focus Forum, Ford Focus ST Forum
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Ford Focus Forum, Ford Focus ST Forum > Ford Focus Tech Discussions > General Forced Induction

General Forced Induction The place to chat about turbochargers, superchargers nitrous systems and custom engine fabrications.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 08-02-2012, 10:55 AM   #1
drostedrummer89
I <3 my SVT
 
drostedrummer89's Avatar
 
Join Date: Sep 2009
Fan#: 69059
Location: Royal Oak, MI
What I Drive: 2002 Sonic SVT

Posts: 1,761
Points 5,154, Level 46
Points: 5,154, Level: 46 Points: 5,154, Level: 46 Points: 5,154, Level: 46
Level Up 2% Completed
Level up: 2% Level up: 2% Level up: 2%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 8 drostedrummer89 Good Standing Member
Buy-Sell-Trade Rating: (10)
Turbo SVT with possible blow by?

I have been helping my friend Trevor (FocusOnTheD) with his ongoing issues in his fully built turbo svt. it doesn't build boost from a roll until nearly 4,000 rpm, and oil is spraying out of the dipstick tube due to the crankcase being pressurized, and we can't figure out why. We have done compression tests, leakdown tests, and none can completely point to a definate cause. He is going to send it to a professional speed shop if we can't figure it out.

The car was tuned on 13 psi and 18 psi, he doesn't even bother running high boost anymore, for fear that something's going to blow.

leakdown test:
cyl 1: 7% loss through valvecover hole
cyl 2: 10% loss through valvecover hole
cyl 3: 20+% loss through intake tube, also felt lots of air exiting thru cyl 4 spark plug hole when we pressurized cyl 3.
cyl 4:10% loss through valve coverhole

anything under 10% is considered within spec, right? The numbers did not change when we added oil to each cylinder and retested. is there any way a bad headgasket could be causing air to escape into an oil pressure or return hole? we checked cam bucket clearance on cylinder 3 to see if incorrect buckets were holding valves open, they were all at .006". could this mean bent valves?


Mods:
forged low compression pistons, forged rods
arp head studs
arp mains, billet caps
turbonetics t3 super 60 (freshly rebuilt by Turbonetics)
Tuned by tom

any advice is appreciated!
Matt


__________________
Droste Drummer. Droste like Frosty.

00" Red ZX3: Volant, ported throttle body, titanium wrapped SVT header, 2.5" exhaust, Magnaflow res/muffler, FR UDP, Mac cam gears, Lowered 2", Koni's.
drostedrummer89 is online now  
    Reply With Quote
Old 08-02-2012, 12:48 PM   #2
1turbofocus
FF Affiliate
 
1turbofocus's Avatar
 
Join Date: Oct 2003
Fan#: 1123
Location: Belmont, NC
What I Drive: 2000 ZX3 / 2002 SVT Turbocharged

Posts: 21,916
Points 50,442, Level 100
Points: 50,442, Level: 100 Points: 50,442, Level: 100 Points: 50,442, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 25%
Activity: 25% Activity: 25% Activity: 25%
FF Reputation: 154 1turbofocus Excellent Standing Member 1turbofocus Excellent Standing Member
Buy-Sell-Trade Rating: (28)
What about the pcv ?

Tom
__________________
Focus-Power: Your #1 Source for Ford Focus Speed, Tuning & Performance!

Customer Support
AIM: hpdyno
Email: hpdyno@aol.com
Phone: 704-249-3745
Site: focus-power.com

Elder 1turbofocus
1turbofocus is offline  
    Reply With Quote
Old 08-02-2012, 02:10 PM   #3
ZXthrizzle05
TURBO ZX3
 
ZXthrizzle05's Avatar
 
Join Date: Jun 2005
Fan#: 24434
Location: Marysville, WA
What I Drive: 2007 mazda 3 I sport, TURBO ZX3

Posts: 8,453
Points 50,141, Level 100
Points: 50,141, Level: 100 Points: 50,141, Level: 100 Points: 50,141, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 10%
Activity: 10% Activity: 10% Activity: 10%
FF Reputation: 6 ZXthrizzle05 Good Standing Member
Buy-Sell-Trade Rating: (11)
I used to have an issue with boost being built up. Turns out I didn't install the wastegate valve seal. So I put it in and it builds great. Also with my pcv it vents to the atmosphere. Wether or not any oil is spewing out of my dipstick I don't know but tiny bit does come out of the pcv sometimes.
__________________
FF MODERATOR
RISE AGAIN EGGYOLK302 WHP 274 WTQ ZETEC CREW #271
RIFF CREW
ZXthrizzle05 is offline  
    Reply With Quote
Old 08-02-2012, 04:36 PM   #4
drostedrummer89
I <3 my SVT
 
drostedrummer89's Avatar
 
Join Date: Sep 2009
Fan#: 69059
Location: Royal Oak, MI
What I Drive: 2002 Sonic SVT

Posts: 1,761
Points 5,154, Level 46
Points: 5,154, Level: 46 Points: 5,154, Level: 46 Points: 5,154, Level: 46
Level Up 2% Completed
Level up: 2% Level up: 2% Level up: 2%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 8 drostedrummer89 Good Standing Member
Buy-Sell-Trade Rating: (10)
wastegate is functioning, it has been repaired and is opening and closing at desired pressure.

tom, this is the car you have been helping us datalog. you helped us with pcv, it has a catchcan which is also spraying oil. pcv mod has been done.

there are only 20k on built motor. didn't know a fully built focus engine had such a short shelf life. we're wondering if rings weren't installed properly.

Matt
__________________
Droste Drummer. Droste like Frosty.

00" Red ZX3: Volant, ported throttle body, titanium wrapped SVT header, 2.5" exhaust, Magnaflow res/muffler, FR UDP, Mac cam gears, Lowered 2", Koni's.
drostedrummer89 is online now  
    Reply With Quote
Old 08-02-2012, 04:48 PM   #5
1turbofocus
FF Affiliate
 
1turbofocus's Avatar
 
Join Date: Oct 2003
Fan#: 1123
Location: Belmont, NC
What I Drive: 2000 ZX3 / 2002 SVT Turbocharged

Posts: 21,916
Points 50,442, Level 100
Points: 50,442, Level: 100 Points: 50,442, Level: 100 Points: 50,442, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 25%
Activity: 25% Activity: 25% Activity: 25%
FF Reputation: 154 1turbofocus Excellent Standing Member 1turbofocus Excellent Standing Member
Buy-Sell-Trade Rating: (28)
So the valve cover is 1/2 inch hose and open , pcv is at lease 3/8 and also open and not going to the intake manifold ?

20% is high , did adding oil help any to lower the # ?

Tom
__________________
Focus-Power: Your #1 Source for Ford Focus Speed, Tuning & Performance!

Customer Support
AIM: hpdyno
Email: hpdyno@aol.com
Phone: 704-249-3745
Site: focus-power.com

Elder 1turbofocus
1turbofocus is offline  
    Reply With Quote
Old 08-02-2012, 06:34 PM   #6
drostedrummer89
I <3 my SVT
 
drostedrummer89's Avatar
 
Join Date: Sep 2009
Fan#: 69059
Location: Royal Oak, MI
What I Drive: 2002 Sonic SVT

Posts: 1,761
Points 5,154, Level 46
Points: 5,154, Level: 46 Points: 5,154, Level: 46 Points: 5,154, Level: 46
Level Up 2% Completed
Level up: 2% Level up: 2% Level up: 2%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 8 drostedrummer89 Good Standing Member
Buy-Sell-Trade Rating: (10)
Right. No the oil did not help significantly. It did help it smoke significantly after startup, figures.

How in the world could pressure testing cyl 3 result in cyl 4 blowing out air? Cracked block? Cracked head? Blown head gasket?

Matt
Posted via FF Mobile
drostedrummer89 is online now  
    Reply With Quote
Old 08-03-2012, 07:40 AM   #7
1turbofocus
FF Affiliate
 
1turbofocus's Avatar
 
Join Date: Oct 2003
Fan#: 1123
Location: Belmont, NC
What I Drive: 2000 ZX3 / 2002 SVT Turbocharged

Posts: 21,916
Points 50,442, Level 100
Points: 50,442, Level: 100 Points: 50,442, Level: 100 Points: 50,442, Level: 100
Level Up 0% Completed
Level up: 0% Level up: 0% Level up: 0%
Forum Activity 25%
Activity: 25% Activity: 25% Activity: 25%
FF Reputation: 154 1turbofocus Excellent Standing Member 1turbofocus Excellent Standing Member
Buy-Sell-Trade Rating: (28)
Quote:
Originally Posted by drostedrummer89 View Post
Right. No the oil did not help significantly. It did help it smoke significantly after startup, figures.

How in the world could pressure testing cyl 3 result in cyl 4 blowing out air? Cracked block? Cracked head? Blown head gasket?

Matt
Posted via FF Mobile
My guess would be an open intake valve blowing it into the intake and into cyl 4 , if you have a cracked anything or blown HG you would have 2 dead Cyl and you dont

When you did this test did you have the valve cover off and check to make sure all valves closed on the testing Cyl

Tom
__________________
Focus-Power: Your #1 Source for Ford Focus Speed, Tuning & Performance!

Customer Support
AIM: hpdyno
Email: hpdyno@aol.com
Phone: 704-249-3745
Site: focus-power.com

Elder 1turbofocus
1turbofocus is offline  
    Reply With Quote
Old 08-02-2012, 11:32 PM   #8
Indy'sexclusiveZx3
Focus Addict
 
Join Date: May 2009
Fan#: 65419
Location: Indianapolis, IN
What I Drive: 2013 tuxedo black st

Posts: 569
FF Reputation: 7 Indy'sexclusiveZx3 Good Standing Member
Buy-Sell-Trade Rating: (3)
I vote cracked block
__________________
Parts for sale check out my thread, got a new st need to sale old parts
Indy'sexclusiveZx3 is offline  
    Reply With Quote
Old 08-03-2012, 02:26 AM   #9
Roushturboedzx3
I Fab Too Much
 
Roushturboedzx3's Avatar
 
Join Date: Jan 2007
Fan#: 42814
Location: CLearwater, FL
What I Drive: 2002 Liquid Gray ZX3

Posts: 4,739
Points 14,483, Level 78
Points: 14,483, Level: 78 Points: 14,483, Level: 78 Points: 14,483, Level: 78
Level Up 9% Completed
Level up: 9% Level up: 9% Level up: 9%
Forum Activity 1%
Activity: 1% Activity: 1% Activity: 1%
FF Reputation: 20 Roushturboedzx3 Great Standing Member
Buy-Sell-Trade Rating: (18)
Crack block seems extreme to me. Prob broken ring lands or leaking valves.
__________________
New: 2012 Mustang GT premium
SOLD:RACE GAS 602whp 501tq Pump Gas SAE 454whp
Garrett GT3582r, Topmount, built motor, Ported head,Tuned by Fernando@RacingPartsSolution
I may not be the baddest, but the baddest dont Fu** with me
Roushturboedzx3 is offline  
    Reply With Quote
Old 08-03-2012, 08:30 AM   #10
drostedrummer89
I <3 my SVT
 
drostedrummer89's Avatar
 
Join Date: Sep 2009
Fan#: 69059
Location: Royal Oak, MI
What I Drive: 2002 Sonic SVT

Posts: 1,761
Points 5,154, Level 46
Points: 5,154, Level: 46 Points: 5,154, Level: 46 Points: 5,154, Level: 46
Level Up 2% Completed
Level up: 2% Level up: 2% Level up: 2%
Forum Activity 0%
Activity: 0% Activity: 0% Activity: 0%
FF Reputation: 8 drostedrummer89 Good Standing Member
Buy-Sell-Trade Rating: (10)
Quote:
Originally Posted by Roushturboedzx3 View Post
Prob broken ring lands or leaking valves.
Don't leaking valves only cause air to escape through the intake? There's no way it could pressurize the block, right?

valve cover was off. i have read that sometimes a cracked or warped cylinder head or blown gasket can cause air to exit an ajacent cylinder. I need to redo the test and tap the buckets on cyl 3 to see if the valves snap shut. may also pull the cams.

We are really hoping its in the top end, we don't want to get into a full rebuild.

as a side note, we did the same leakdown test under the same circumstances a few months prior, and we had ALOT of air leaking from valvecover. like over 20% on 2 different cylinders. we were surprised that we didn't get anywhere near the same results. we'll do it a third time and check back.

Matt
__________________
Droste Drummer. Droste like Frosty.

00" Red ZX3: Volant, ported throttle body, titanium wrapped SVT header, 2.5" exhaust, Magnaflow res/muffler, FR UDP, Mac cam gears, Lowered 2", Koni's.
drostedrummer89 is online now  
    Reply With Quote
Reply

Bookmarks & Social Networks

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -5. The time now is 03:22 AM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.