i am sure i have a small leak somewhere in the charge air system...but i cant damn well find it. has anybody here used those rubber caps with the air hose fitting that goes on the inlet side of the turbo?? what other methods have you used to locate small leaks?? Thanks. -

cap a chunk of PVC pipe and then thread to take an air fitting. you can put a regulator on it too or on your compressor. set it to about 15-20 psi.

BTW, welcome to Diesel Bombers. -

Johnny Cetane's Sig:

2005 Chev CC/SB/4x4/Alli

Vaginas For Life!

test yer air charge system you may have a leak

easy to do just go get ya a 4" rubber boot and a 4" PVC 40 schd cap....tap the cap to accept some 1/4" plumbing to include a gauge and a tire valve nipple ..............get a couple good clamps and clap the thing on yer turbo inlet and charge it up with yer air compressor.

I did this to 11 trucks during a truck rally at my shop and guess what......found leaks on every single truck including mine -

Whitmore's Sig:

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You can always inject a small amount of marvel mystery oil on the intake side of the turbo. -

DangerousDuramax's Sig:

'05 2500HD CC/SB, LT, 2WD, Black
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When I grow up I want to be just like Dr Evil!!! If I don't grow up I want to be just like Whitmore!!!

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They can take your life, freedom, and possessions but they cant take your knowledge or your God.

That dont surprise me. -

say what??? -

Marvel mystery oil white smokes like crazy when burned. It's the best thing to run through and engine to blow it out and for long term storage. If you shoot a little on the intake side of the turbo you will see the smoke come out where the leak is. -

when you pressure test the system does it hurt the truck to have so much air pressure on it without running? How high should I run it up to? I want atleast 40psi back. But my turbo is set to open at 50psi? -

dalton06's Sig:

06 2500 Laramie, Bullydog TripleDog with Outlook Monitor, AEM BruteForce Intake, Silverline 4" Duals, Quadzilla Boost Fooler, BD AUX Lift Pump, Autometer Boost Pyro Tranny Gauges, CFM+ Intake Manifold

test it from the exit side of the turbo also just take the hose off.
you should just build up pressure and hear or use soap and water to see where it's leaking from..

it's probably not a good idea to spool the turbo with out the engine running to provide oil to the bearings. -

bow2no1's Sig:

You can also use a smoke machine. If you invest in one, you can use it for exhaust leaks also. Hook it up, and anywhere you see smoke, you have a leak. You could always pour some smoke in the system, then pressurize it to see if you have a leak under pressure as connectors swell up (and they do...... ALOT under boost) -

Or you can spray it w/ soapy water, It will make bubbles where the leak is. -

Diesel-N-Dust's Sig:

There is nothing wrong with me, I'm not trying to see things your way.
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only when under boost/pressure -

Really? why? -

These threads are the introduction to workin on there first truck for many of the folks readin them, so what may sound like basic common sence at your level of experience may need to be explained for their benefit. -

Uncle Bubba's Sig:

99 Quad Cab, 4wd, Drag Comp W/Pump Wire & Boost Elbow installed, K&N Air Canon, MBRP exhaust, Belt Drive Lift Pump and bottom Bulkhead feed from the tank, Isspro EV Pyrometer, Boost Gauge, Fuel Pressure Gauge, DT Pro Fab Trac Bar, South Bend 13-1.25 Con O Clutch, Ranch Hand Bumper, Borgeson Steering Shaft, Black Silicone Boots, 2" Lift Soft Ride Front Coils, Solenoid High Idle Kit, Bilstein 5100 HD Shocks, Rickson 19.5 Wheels w/Hancoock Rubber, HD Maxx Link Sway Bar Links, Superlift dual front stabilizer, EGR Brakes Front and Back, RV275 Injector's, Blue Chip VP44, Prodigy brake controller, B&W Gooseneck hitch and more I can't remember right now. Not to mention more to come I'm sure.
374.2/846.7 at 30psi

ok sorry bout the sarcasm -