Need help: Dumb boost leak detector question
Thread Starter
|
Fleet Mechanic
Joined: Aug 2010
Posts: 1,458
Likes: 156
From: Sedalia, CO
Need help: Dumb boost leak detector question
When testing for a boost leak, with the tester plumbed in after the CCV (toward the turbo) I still get tons of air out the CCV, even on a warm motor. Why is that? The motor is in great shape, with little blowby shown by the oil cap test.
I know I have boost leak (higher EGT's, much lower boost and more smoke with the new ported housing wheel than before), but I'll never be able to find it/them with the CCV preventing pressurization.
Mark
I know I have boost leak (higher EGT's, much lower boost and more smoke with the new ported housing wheel than before), but I'll never be able to find it/them with the CCV preventing pressurization.
Mark
Thread Starter
|
Fleet Mechanic
Joined: Aug 2010
Posts: 1,458
Likes: 156
From: Sedalia, CO
I can get about 14psi, and it bleeds down through the CCV. Maybe that's good enough, as I can't find any soapy bubbles anywhere else. I did find one obvious leak, at the fitting for the plastic boost gauge tube. (I despise gauges that use these tubes, and would never buy another one.)
I've never done a compression test on this thing in the 11+ years I've had it, but I suppose I should. I'd think if compression were that bad, the upside down oil cap would come off the filler tube pretty quick, and it doesn't.
Mark
I've never done a compression test on this thing in the 11+ years I've had it, but I suppose I should. I'd think if compression were that bad, the upside down oil cap would come off the filler tube pretty quick, and it doesn't.
Mark
Laughing Gas
Joined: Nov 2013
Posts: 868
Likes: 1
From: SoCal
There's gonna be some air coming out of the CCV, but you said there was a "ton" of air. How long does it take for the pressure to bleed off after you stop the air flow? When I did mine, I took it to 20psi and it would leak down in about 5 seconds or so.
Thread Starter
|
Fleet Mechanic
Joined: Aug 2010
Posts: 1,458
Likes: 156
From: Sedalia, CO
And another little piece of me dies... I did have a boost leak from that infernal gauge, but the real problem was the wastegate arm incorrectly oriented, and holding the gate open. [sigh]
Mark
Mark
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
I have to ask... are you putting the boost leak detector straight on the turbo inlet boot, or are you going through the tee to the CCV?
Trending Topics
Thread Starter
|
Fleet Mechanic
Joined: Aug 2010
Posts: 1,458
Likes: 156
From: Sedalia, CO
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
No accusation... just being thorough. A lot of puff in the CCV? I guess the next test would be to pop the VCs and the glow plugs, then do a compression test. One quickie test would be to rotate the engine one cylinder at a time by puffing each GP hole with air through a rubber nozzle. I've done that, and it's kinduh cool. This was how I found a loose injector the first time - it popped up (bolt out).
Thread Starter
|
Fleet Mechanic
Joined: Aug 2010
Posts: 1,458
Likes: 156
From: Sedalia, CO
No worries - not taken as such. I think what I'm seeing is normal, but not what I expected. My naïve expectation was that the intake side of these things is a closed system, and that's just not the case, else there'd be no need for a CCV. I was able to bring it up to 14psi with no bubbles anywhere, so I think any boost leaks have been fixed. 29psi on my boost gauge seems to confirm that, so I think I'm good.
Mark
Mark
Thread Starter
|
Fleet Mechanic
Joined: Aug 2010
Posts: 1,458
Likes: 156
From: Sedalia, CO
Mark
Thread
Thread Starter
Forum
Replies
Last Post
GSDogs
1994.5 - 1997 7.3L Power Stroke Diesel
34
Jun 28, 2022 09:25 PM
Oldanvilyoungsmith
1999 - 2003 7.3L Power Stroke Diesel
19
Apr 27, 2017 07:16 AM
brichert
1999 - 2003 7.3L Power Stroke Diesel
12
Sep 24, 2016 05:35 PM