Need help: Dumb boost leak detector question
#1
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
#3
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
#4
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#7
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#8
#9
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).
#10
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
#12
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